US Patent No: 7,539,474

Number of patents in Portfolio can not be more than 2000

DC offset, re-radiation, and I/Q solutions using universal frequency translation technology

ALSO PUBLISHED AS: 20050143042

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal, and applications thereof are described herein. Reducing or eliminating DC offset voltages and re-radiation generated when down-converting an electromagnetic (EM) signal is also described herein. Down-converting a signal and improving receiver dynamic range is also described herein.

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First Claim

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all claims..

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Patent Owner(s)

Patent OwnerAddressTotal Patents
PARKERVISION, INC.JACKSONVILLE, FL187

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bultman, Michael J Jacksonville, FL 184 5231
Cook, Robert W Switzerland, FL 179 5188
Jensen, Jonathan S Salt Lake City, UT 15 286
Johnson, Martin R Draper, UT 33 371
Looke, Richard C Jacksonville, FL 174 5180
Moses,, Jr Charley D - 69 688
Rawlins, Gregory S Heathrow, FL 245 4917
Rawlins, Michael W Lake Mary, FL 214 4762
Short, Robert T Salt Lake City, UT 40 2028
Sorrels, David F - 1 32
Young, Jamison L Woods Cross, UT 14 286

Cited Art Landscape

Patent Info (Count) # Cites Year
 
AKAMAI TECHNOLOGIES, INC. (87)
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PARKERVISION, INC. (64)
6,049,706 Integrated frequency translation and selectivity 128 1998
6,061,551 Method and system for down-converting electromagnetic signals 137 1998
6,061,555 Method and system for ensuring reception of a communications signal 117 1998
6,091,940 Method and system for frequency up-conversion 117 1998
6,370,371 Applications of universal frequency translation 109 1999
6,560,301 Integrated frequency translation and selectivity with a variety of filter embodiments 89 1999
6,580,902 Frequency translation using optimized switch structures 93 1999
6,687,493 Method and circuit for down-converting a signal using a complementary FET structure for improved dynamic range 93 1999
6,266,518 Method and system for down-converting electromagnetic signals by sampling and integrating over apertures 111 1999
6,421,534 Integrated frequency translation and selectivity 117 1999
6,647,250 Method and system for ensuring reception of a communications signal 98 1999
6,353,735 MDG method for output signal generation 101 1999
6,704,549 Multi-mode, multi-band communication system 99 2000
6,704,558 Image-reject down-converter and embodiments thereof, such as the family radio service 93 2000
7,006,805 Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service 71 2000
7,209,725 Analog zero if FM decoder and embodiments thereof, such as the family radio service 52 2000
6,634,555 Bar code scanner using universal frequency translation technology for up-conversion and down-conversion 86 2000
6,853,690 Method, system and apparatus for balanced frequency up-conversion of a baseband signal and 4-phase receiver and transceiver embodiments 81 2000
6,879,817 DC offset, re-radiation, and I/Q solutions using universal frequency translation technology 74 2000
7,110,435 Spread spectrum applications of universal frequency translation 77 2000
6,798,351 Automated meter reader applications of universal frequency translation 81 2000
7,039,372 Method and system for frequency up-conversion with modulation embodiments 83 2000
7,065,162 Method and system for down-converting an electromagnetic signal, and transforms for same 72 2000
7,295,826 Integrated frequency translation and selectivity with gain control functionality, and applications thereof 52 2000
6,694,128 Frequency synthesizer using universal frequency translation technology 90 2000
6,873,836 Universal platform module and methods and apparatuses relating thereto enabled by universal frequency translation technology 82 2000
7,027,786 Carrier and clock recovery using universal frequency translation 62 2000
7,321,735 Optical down-converter using universal frequency translation technology 44 2000
7,082,171 Phase shifting applications of universal frequency translation 65 2000
7,054,296 Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation 197 2000
7,072,390 Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments 66 2000
7,110,444 Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations 67 2000
7,292,835 Wireless and wired cable modem applications of universal frequency translation technology 49 2001
7,379,515 Phased array antenna applications of universal frequency translation 46 2001
6,813,485 Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same 103 2001
7,010,286 Apparatus, system, and method for down-converting and up-converting electromagnetic signals 70 2001
7,085,335 Method and apparatus for reducing DC offsets in a communication system 64 2001
7,010,559 Method and apparatus for a parallel correlator and applications thereof 73 2001
7,016,663 Applications of universal frequency translation 62 2002
7,236,754 Method and system for frequency up-conversion 54 2002
7,379,883 Networking methods and systems 42 2002
7,460,584 Networking methods and systems 32 2002
7,072,427 Method and apparatus for reducing DC offsets in a communication system 82 2002
6,975,848 Method and apparatus for DC offset removal in a radio frequency communication channel 68 2002
7,321,751 Method and apparatus for improving dynamic range in a communication system 45 2002
7,272,164 Reducing DC offsets using spectral spreading 49 2002
6,963,734 Differential frequency down-conversion using techniques of universal frequency translation technology 73 2002
7,190,941 Method and apparatus for reducing DC offsets in communication systems using universal frequency translation technology 52 2002
7,224,749 Method and apparatus for reducing re-radiation using techniques of universal frequency translation technology 51 2002
6,836,650 Methods and systems for down-converting electromagnetic signals, and applications thereof 83 2002
7,076,011 Integrated frequency translation and selectivity 63 2003
7,389,100 Method and circuit for down-converting a signal 41 2003
7,321,640 Active polyphase inverter filter for quadrature signal generation 44 2003
7,454,453 Methods, systems, and computer program products for parallel correlation and applications thereof 33 2003
7,308,242 Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same 45 2004
7,107,028 Apparatus, system, and method for up converting electromagnetic signals 59 2004
7,218,899 Apparatus, system, and method for up-converting electromagnetic signals 54 2004
7,386,292 Apparatus, system, and method for down-converting and up-converting electromagnetic signals 44 2004
7,194,246 Methods and systems for down-converting a signal using a complementary transistor structure 52 2004
7,245,886 Method and system for frequency up-conversion with modulation embodiments 52 2005
7,233,969 Method and apparatus for a parallel correlator and applications thereof 90 2005
7,433,910 Method and apparatus for the parallel correlator and applications thereof 36 2005
7,218,907 Method and circuit for down-converting a signal 52 2005
7,376,410 Methods and systems for down-converting a signal using a complementary transistor structure 41 2006
 
MOTOROLA, INC. (24)
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5,410,270 Differential amplifier circuit having offset cancellation and method therefor 142 1994
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MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (17)
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5,369,789 Burst signal transmitter 130 1994
5,757,870 Spread spectrum communication synchronizing method and its circuit 101 1995
5,600,680 High frequency receiving apparatus 94 1995
5,640,428 Direct conversion receiver 113 1995
5,760,629 DC offset compensation device 95 1996
5,818,869 Spread spectrum communication synchronizing method and its circuit 100 1997
6,067,329 VSB demodulator 100 1997
5,903,178 Semiconductor integrated circuit 133 1997
5,945,660 Communication system for wireless bar code reader 162 1997
6,275,542 Direct conversion receiver including mixer down-converting incoming signal, and demodulator operating on downconverted signal 55 1998
6,178,319 Microwave mixing circuit and down-converter 85 1998
6,600,795 Receiving circuit 88 1999
6,313,700 Power amplifier and communication unit 66 2000
 
U.S. PHILIPS CORPORATION (14)
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MOTOROLA MOBILITY LLC (12)
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5,748,683 Multi-channel transceiver having an adaptive antenna array and method 124 1995
5,710,998 Method and apparatus for improved zero intermediate frequency receiver latency 120 1995
5,705,955 Frequency locked-loop using a microcontroller as a comparator 136 1995
5,901,347 Fast automatic gain control circuit and method for zero intermediate frequency receivers and radiotelephone using same 127 1996
5,689,413 Voltage convertor for a portable electronic device 114 1996
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6,321,073 Radiotelephone receiver and method with improved dynamic range and DC offset correction 131 2000
6,625,470 Transmitter 53 2000
 
NEC CORPORATION (11)
4,806,790 Sample-and-hold circuit 120 1988
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5,091,921 Direct conversion receiver with dithering local carrier frequency for detecting transmitted carrier frequency 115 1990
5,260,973 Device operable with an excellent spectrum suppression 87 1991
5,196,806 Output level control circuit for use in RF power amplifier 120 1991
5,410,195 Ripple-free phase detector using two sample-and-hold circuits 73 1992
5,353,306 Tap-weight controller for adaptive matched filter receiver 124 1992
5,379,040 Digital-to-analog converter 106 1993
5,339,054 Modulated signal transmission system compensated for nonlinear and linear distortion 124 1993
5,784,689 Output control circuit for transmission power amplifying circuit 138 1995
6,175,728 Direct conversion receiver capable of canceling DC offset voltages 141 1998
 
QUALCOMM INCORPORATED (11)
5,446,422 Dual mode FM and DQPSK modulator 124 1994
5,757,858 Dual-mode digital FM communication system 183 1997
5,896,562 Transmitter/receiver for transmitting and receiving of an RF signal in two frequency bands 193 1997
5,982,315 Multi-loop .SIGMA. .DELTA. analog to digital converter 144 1997
6,005,506 Receiver with sigma-delta analog-to-digital converter for sampling a received signal 135 1997
6,137,321 Linear sampling switch 41 1999
6,088,348 Configurable single and dual VCOs for dual- and tri-band wireless communication systems 74 1999
6,366,622 Apparatus and method for wireless communications 319 1999
6,973,476 System and method for communicating data via a wireless high speed link 80 2000
6,731,146 Method and apparatus for reducing PLL lock time 55 2000
6,909,739 Signal acquisition system for spread spectrum receiver 66 2000
 
ROCKWELL INTERNATIONAL CORPORATION (11)
4,241,451 Single sideband signal demodulator 94 1978
4,253,067 Baseband differentially phase encoded radio signal detector 126 1978
4,363,976 Subinterval sampler 53 1981
4,463,320 Automatic gain control circuit 40 1982
4,484,143 CCD Demodulator circuit 95 1982
4,772,853 Digital delay FM demodulator with filtered noise dither 90 1987
4,814,649 Dual gate FET mixing apparatus with feedback means 76 1987
5,095,533 Automatic gain control system for a direct conversion receiver 124 1990
5,095,536 Direct conversion receiver with tri-phase architecture 142 1990
5,249,203 Phase and gain error control system for use in an I/Q direct conversion receiver 159 1991
5,564,097 Spread intermediate frequency radio receiver with adaptive spurious rejection 106 1994
 
LUCENT TECHNOLOGIES INC. (10)
5,724,653 Radio receiver with DC offset correction circuit 192 1994
5,745,846 Channelized apparatus for equalizing carrier powers of multicarrier signal 131 1995
5,602,847 Segregated spectrum RF downconverter for digitization systems 124 1995
5,767,726 Four terminal RF mixer device 112 1996
6,298,065 Method for multi-mode operation of a subscriber line card in a telecommunications system 72 1997
6,078,630 Phase-based receiver with multiple sampling frequencies 90 1998
6,167,247 Local oscillator leak cancellation circuit 45 1998
6,618,579 Tunable filter with bypass 114 1999
6,437,639 Programmable RC filter 99 2000
2002/0132,642 Common module combiner/active array multicarrier approach without linearization loops 59 2001
 
SONY CORPORATION (10)
4,220,977 Signal transmission circuit 96 1978
4,439,787 AFT Circuit 65 1982
4,612,464 High speed buffer circuit particularly suited for use in sample and hold circuits 108 1984
5,172,070 Apparatus for digitally demodulating a narrow band modulated signal 111 1991
5,608,531 Video signal recording apparatus 105 1994
6,097,762 Communication system 45 1995
5,633,610 Monolithic microwave integrated circuit apparatus 68 1995
5,903,854 High-frequency amplifier, transmitting device and receiving device 195 1996
6,801,253 Solid-state image sensor and method of driving same 97 1998
6,910,015 Sales activity management system, sales activity management apparatus, and sales activity management method 62 2001
 
MOTOROLA SOLUTIONS, INC. (9)
5,389,839 Integratable DC blocking circuit 96 1993
5,483,691 Zero intermediate frequency receiver having an automatic gain control circuit 159 1994
5,801,654 Apparatus and method for frequency translation in a communication device 115 1995
5,602,868 Multiple-modulation communication system 164 1995
5,898,912 Direct current (DC) offset compensation method and apparatus 133 1996
5,903,196 Self centering frequency multiplier 108 1997
6,121,819 Switching down conversion mixer for use in multi-stage receiver architectures 105 1998
5,973,570 Band centering frequency multiplier 43 1998
6,225,848 Method and apparatus for settling and maintaining a DC offset 109 2000
 
FREESCALE SEMICONDUCTOR, INC. (8)
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5,729,577 Signal processor with improved efficiency 135 1996
5,870,670 Integrated image reject mixer 136 1996
5,892,380 Method for shaping a pulse width and circuit therefor 116 1997
6,144,846 Frequency translation circuit and method of translating 114 1997
 
MITSUBISHI DENKI KABUSHIKI KAISHA (8)
4,485,347 Digital FSK demodulator 67 1981
4,651,034 Analog input circuit with combination sample and hold and filter 113 1984
5,251,232 Radio communication apparatus 189 1991
5,751,154 capacitive sensor interface circuit 118 1996
5,903,595 Digital matched filter 125 1997
6,259,293 Delay circuitry, clock generating circuitry, and phase synchronization circuitry 98 1999
6,600,911 Even harmonic direct-conversion receiver, and a transmitting and receiving apparatus using the same 101 2000
6,876,846 High frequency module 45 2001
 
FUJITSU LIMITED (7)
4,870,659 FSK demodulation circuit 108 1988
5,760,632 Double-balanced mixer circuit 93 1996
6,011,435 Transmission-line loss equalizing circuit 98 1997
5,914,622 Pulse-width controller 110 1997
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5,844,449 Gilbert cell phase modulator having two outputs combined in a balun 108 1997
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INTEL CORPORATION (7)
5,412,352 Modulator having direct digital synthesis for broadband RF transmission 156 1994
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KABUSHIKI KAISHA TOSHIBA (7)
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6,204,789 Variable resistor circuit and a digital-to-analog converter 100 2000
7,197,081 System and method for receiving OFDM signal 42 2001
6,690,232 Variable gain amplifier 125 2002
 
SIEMENS AKTIENGESELLSCHAFT (7)
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4,726,041 Digital filter switch for data receiver 107 1986
5,115,409 Multiple-input four-quadrant multiplier 126 1989
5,020,154 Transmission link 105 1990
5,014,130 Signal level control circuit having alternately switched capacitors in the feedback branch 70 1990
 
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (7)
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6,892,057 Method and apparatus for reducing dynamic range of a power amplifier 62 2002
 
TEXAS INSTRUMENTS INCORPORATED (7)
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Bell Telephone Laboratories, Incorporated (6)
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4,873,492 Amplifier with modulated resistor gain control 139 1988
5,012,245 Integral switched capacitor FIR filter/digital-to-analog converter for sigma-delta encoded digital audio 127 1989
 
RAYTHEON COMPANY (6)
4,616,191 Multifrequency microwave source 104 1983
4,634,998 Fast phase-lock frequency synthesizer with variable sampling efficiency 112 1985
4,810,904 Sample-and-hold phase detector circuit 109 1988
4,955,079 Waveguide excited enhancement and inherent rejection of interference in a subharmonic mixer 119 1989
5,884,154 Low noise mixer circuit having passive inductor elements 88 1996
6,147,340 Focal plane readout unit cell background suppression circuit and method 107 1998
 
SKYWORKS SOLUTIONS, INC. (6)
5,523,719 Component insensitive, analog bandpass filter 105 1994
5,778,022 Extended time tracking and peak energy in-window demodulation for use in a direct sequence spread spectrum system 118 1995
6,125,271 Front end filter circuitry for a dual band GSM/DCS cellular phone 108 1998
6,057,714 Double balance differential active ring mixer with current shared active input balun 137 1998
6,404,823 Envelope feedforward technique with power control for efficient linear RF power amplification 169 1998
6,307,894 Power amplification using a direct-upconverting quadrature mixer topology 151 1999
 
Thomson-CSF (6)
4,365,217 Charge-transfer switched-capacity filter 102 1980
4,392,255 Compact subharmonic mixer for EHF wave receiver using a single wave guide and receiver utilizing such a mixer 106 1981
4,363,132 Diversity radio transmission system having a simple and economical structure 105 1981
4,485,488 Microwave subharmonic mixer device 122 1982
4,688,237 Device for generating a fractional frequency of a reference frequency 46 1984
4,967,160 Frequency multiplier with programmable order of multiplication 157 1989
 
UNWIRED PLANET, LLC (6)
5,680,418 Removing low frequency interference in a digital FM receiver 113 1994
5,834,985 Digital continuous phase modulation for a DDS-driven phase locked loop 122 1996
6,215,828 Signal transformation method and apparatus 105 1997
6,611,569 Down/up-conversion apparatus and method 92 1998
6,567,483 Matched filter using time-multiplexed precombinations 67 1999
6,546,061 Signal transformation method and apparatus 38 2001
 
APPLE INC. (5)
5,471,665 Differential DC offset compensation circuit 174 1994
5,606,731 Zerox-IF receiver with tracking second local oscillator and demodulator phase locked loop oscillator 108 1995
5,918,167 Quadrature downconverter local oscillator leakage canceller 83 1997
6,094,084 Narrowband LC folded cascode structure 119 1998
6,327,313 Method and apparatus for DC offset correction 108 1999
 
CANON KABUSHIKI KAISHA (5)
5,267,023 Signal processing device 105 1991
5,465,071 Information signal processing apparatus 104 1995
5,771,442 Dual mode transmitter 118 1995
5,844,868 Digital-analog shared circuit in dual mode radio equipment 102 1997
6,459,721 Spread spectrum receiving apparatus 88 1998
 
NOKIA MOBILE PHONES LTD. (5)
5,697,074 Dual rate power control loop for a transmitter 168 1995
5,734,683 Demodulation of an intermediate frequency signal by a sigma-delta converter 81 1996
6,073,001 Down conversion mixer 98 1998
6,317,589 Radio receiver and method of operation 104 1998
6,438,366 Method and circuit for sampling a signal at high sampling frequency 73 1999
 
RCA Corporation (5)
4,204,171 Filter which tracks changing frequency of input signal 104 1978
4,286,283 Transcoder 73 1979
4,483,017 Pattern recognition system using switched capacitors 95 1981
4,393,395 Balanced modulator with feedback stabilization of carrier balance 100 1981
4,651,210 Adjustable gamma controller 50 1984
 
SYMBOL TECHNOLOGIES, INC. (5)
5,157,687 Packet data communication network 308 1990
5,809,060 High-data-rate wireless local-area network 202 1994
6,215,475 Highly integrated portable electronic work slate unit 111 1995
6,330,244 System for digital radio communication between a wireless lan and a PBX 322 1998
6,098,886 Glove-mounted system for reading bar code symbols 108 1998
 
The United States of America as represented by the Secretary of the Navy (5)
6,531,979 Adaptive time-compression stabilizer 87 1970
4,660,164 Multiplexed digital correlator 211 1983
5,535,402 System for (N.cndot.M)-bit correlation using N M-bit correlators 63 1992
5,663,986 Apparatus and method of transmitting data over a coaxial cable in a noisy environment 108 1996
5,883,548 Demodulation system and method for recovering a signal of interest from an undersampled, modulated carrier 99 1997
 
WI-LAN INC. (5)
5,282,222 Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum 475 1992
5,428,638 Method and apparatus for reducing power consumption in digital communications devices 113 1993
5,732,333 Linear transmitter using predistortion 248 1996
6,018,553 Multi-level mixer architecture for direct conversion of FSK signals 116 1996
5,881,375 Paging transmitter having broadband exciter using an intermediate frequency above the transmit frequency 102 1997
 
GENERAL ELECTRIC COMPANY (4)
4,902,979 Homodyne down-converter with digital Hilbert transform filtering 126 1989
4,982,353 Subsampling time-domain digital filter using sparsely clocked output latch 132 1989
5,896,304 Low power parallel correlator for measuring correlation between digital signal segments 157 1997
6,028,887 Power efficient receiver 135 1997
 
IBIQUITY DIGITAL CORPORATION (4)
5,278,826 Method and apparatus for digital audio broadcasting and reception 153 1991
5,315,583 Method and apparatus for digital audio broadcasting and reception 195 1991
5,523,726 Digital quadriphase-shift keying modulator 111 1994
5,768,323 Symbol synchronizer using modified early/punctual/late gate technique 121 1994
 
LOCKHEED MARTIN CORPORATION (4)
4,356,558 Optimum second order digital filter 125 1979
4,885,671 Pulse-by-pulse current mode controlled power supply 67 1988
4,896,152 Telemetry system with a sending station using recursive filter for bandwidth limiting 108 1989
4,888,557 Digital subharmonic sampling down-converter 139 1989
 
MITEL SEMICONDUCTOR LIMITED (4)
5,303,417 Mixer for direct conversion receiver 157 1991
5,451,899 Direct conversion FSK receiver using frequency tracking filters 112 1994
6,211,718 Low voltage double balanced mixer 82 1998
6,308,058 Image reject mixer 102 1998
 
MURATA MANUFACTURING CO., LTD. (4)
5,694,096 Surface acoustic wave filter 112 1996
5,770,985 Surface acoustic wave filter 103 1996
5,680,078 Mixer 107 1996
5,903,421 High-frequency composite part 118 1997
 
RCA LICENSING CORPORATION, TWO INDEPENDENCE WAY, PRINCETON, NJ 08540, A CORP. OF DE (4)
4,334,324 Complementary symmetry FET frequency converter circuits 103 1980
4,603,300 Frequency modulation detector using digital signal vector processing 109 1984
4,745,463 Generalized chrominance signal demodulator for a sampled data television signal processing system 111 1986
4,819,252 Sampled data subsampling apparatus 110 1988
 
SAMSUNG ELECTRONICS CO., LTD. (4)
5,321,852 Circuit and method for converting a radio frequency signal into a baseband signal 138 1991
5,604,732 Up-link access apparatus in direct sequence code division multiple access system 137 1994
5,659,372 Digital TV detector responding to final-IF signal with vestigial sideband below full sideband in frequency 47 1995
5,825,254 Frequency converter for outputting a stable frequency by feedback via a phase locked loop 128 1997
 
SCIENTIFIC-ATLANTA, INC. (4)
5,191,459 Method and apparatus for transmitting broadband amplitude modulated radio frequency signals over optical links 146 1989
5,230,097 Offset frequency converter for phase/amplitude data measurement receivers 115 1990
5,379,141 Method and apparatus for transmitting broadband amplitude modulated radio frequency signals over optical links 112 1992
5,500,758 Method and apparatus for transmitting broadband amplitude modulated radio frequency signals over optical links 115 1994
 
TEKTRONIX, INC. (4)
4,621,217 Anti-aliasing filter circuit for oscilloscopes 115 1984
4,751,468 Tracking sample and hold phase detector 107 1986
4,757,538 Separation of L+R from L-R in BTSC system 111 1986
4,688,253 L+R separation system 105 1986
 
ALCATEL TELSPACE (3)
5,490,176 Detecting false-locking and coherent digital demodulation using the same 96 1992
5,416,803 Process for digital transmission and direct conversion receiver 128 1993
5,760,645 Demodulator stage for direct demodulation of a phase quadrature modulated signal and receiver including a demodulator stage of this kind 105 1996
 
Echelon Corporation (3)
5,239,686 Transceiver with rapid mode switching capability 151 1991
5,404,127 Power line communication while avoiding determinable interference harmonics 166 1993
5,355,114 Reconstruction of signals using redundant channels 183 1994
 
ERICSSON INC. (3)
5,909,460 Efficient apparatus for simultaneous modulation and digital beamforming for an antenna array 144 1995
5,894,496 Method and apparatus for detecting and compensating for undesired phase shift in a radio transceiver 154 1996
5,834,987 Frequency synthesizer systems and methods for three-point modulation with a DC response 143 1997
 
GOOGLE INC. (3)
6,041,073 Multi-clock matched filter for receiving signals with multipath 101 1998
6,823,178 High-speed point-to-point modem-less microwave radio frequency link using direct frequency modulation 76 2001
6,741,139 Optical to microwave converter using direct modulation phase shift keying 74 2002
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (3)
5,428,640 Switch circuit for setting and signaling a voltage level 103 1992
5,705,949 Compensation method for I/Q channel imbalance errors 157 1996
5,768,118 Reciprocating converter 130 1996
 
HITACHI AMERICA, LTD. (3)
5,282,023 Apparatus for NTSC signal interference cancellation through the use of digital recursive notch filters 178 1992
5,400,084 Method and apparatus for NTSC signal interference cancellation using recursive digital notch filters 154 1993
5,325,204 Narrowband interference cancellation through the use of digital recursive notch filters 161 1993
 
Hitachi Denshi Kabushiki Kaisha (3)
5,512,946 Digital video signal processing device and TV camera device arranged to use it 42 1995
5,926,065 Digital modulator having a digital filter including low-speed circuit components 100 1997
6,512,798 Digital communication system of orthogonal modulation type 44 1999
 
HUGHES ELECTRONICS CORPORATION (3)
4,995,055 Time shared very small aperture satellite terminals 153 1988
5,390,215 Multi-processor demodulator for digital cellular base station employing partitioned demodulation procedure with pipelined execution 81 1992
5,495,202 High spectral purity digital waveform synthesizer 118 1993
 
INTELLECTUAL VENTURES II LLC (3)
5,661,424 Frequency hopping synthesizer using dual gate amplifiers 113 1993
5,640,415 Bit error performance of a frequency hopping, radio communication system 115 1994
6,246,695 Variable rate and variable mode transmission system 128 1998
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (3)
5,894,239 Single shot with pulse width controlled by reference oscillator 106 1997
5,872,446 Low voltage CMOS analog multiplier with extended input dynamic range 110 1997
6,128,746 Continuously powered mainstore for large memory subsystems 101 1997
 
ITT MANUFACTURING ENTERPRISES, INC. (3)
5,126,682 Demodulation method and apparatus incorporating charge coupled devices 114 1991
5,483,549 Receiver having for charge-coupled-device based receiver signal processing 211 1994
5,557,641 Charge-coupled-device based transmitters and receivers 106 1994
 
LAWRENCE LIVERMORE NATIONAL SECURITY, LLC (3)
5,471,162 High speed transient sampler 154 1992
5,479,120 High speed sampler and demultiplexer 148 1994
5,523,760 Ultra-wideband receiver 217 1994
 
M&FC HOLDING, LLC (3)
RE35829 Binary phase shift keying modulation system and/or frequency multiplier 151 1995
5,999,561 Direct sequence spread spectrum method, computer-based product, apparatus and system tolerant to frequency reference offset 237 1997
6,639,939 Direct sequence spread spectrum method computer-based product apparatus and system tolerant to frequency reference offset 186 1999
 
PROTOCOL-IP.COM, L.L.C. (3)
4,944,025 Direct conversion FM receiver with offset 187 1988
4,893,341 Digital receiver operating at sub-nyquist sampling rate 110 1989
5,263,194 Zero if radio receiver for intermittent operation 139 1990
 
SHARP KABUSHIKI KAISHA (3)
5,444,416 Digital FM demodulation apparatus demodulating sampled digital FM modulated wave 103 1994
5,960,033 Matched filter 109 1997
6,775,684 Digital matched filter 59 2000
 
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY (3)
5,479,447 Method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digital subscriber lines 740 1993
5,640,698 Radio frequency signal reception using frequency shifting by discrete-time sub-sampling down-conversion 209 1995
6,963,626 Noise-reducing arrangement and method for signal processing 98 1999
 
VICTOR COMPANY OF JAPAN, LTD. (3)
4,472,785 Sampling frequency converter 146 1981
4,984,077 Signal converting apparatus 124 1989
5,539,770 Spread spectrum modulating apparatus using either PSK or FSK primary modulation 109 1994
 
VISTEON GLOBAL TECHNOLOGIES, INC. (3)
5,222,144 Digital quadrature radio receiver with two-step processing 149 1991
5,490,173 Multi-stage digital RF translator 114 1993
5,483,193 Circuit for demodulating FSK signals 108 1995
 
YAMAHA CORPORATION (3)
4,801,823 Sample hold circuit 104 1987
5,499,267 Spread spectrum communication system 108 1993
6,018,262 CMOS differential amplifier for a delta sigma modulator applicable for an analog-to-digital converter 94 1998
 
ALCATEL N.V. (2)
4,718,113 Zero-IF receiver wih feedback loop for suppressing interfering signals 126 1986
5,933,467 Multirate receive device and method using a single adaptive interpolation filter 111 1996
 
AT&T CORP. (2)
5,481,570 Block radio and adaptive arrays for wireless systems 172 1993
5,515,014 Interface between SAW filter and Gilbert cell mixer 130 1994
 
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY (2)
5,065,409 FSK discriminator 104 1989
5,777,771 Generation of optical signals with RF components 121 1996
 
CDC PROPRIETE INTELLECTUELLE (2)
6,230,000 Product detector and method therefor 114 1998
6,441,694 Method and apparatus for generating digitally modulated signals 63 2000
 
CIRRUS LOGIC, INC. (2)
6,084,465 Method for time constant tuning of gm-C filters 103 1998
6,597,240 Circuits and methods for slew rate control and current limiting in switch-mode systems 68 2001
 
DAITA FRONTIER FUND, LLC (2)
6,084,922 Waiting circuit 98 1998
6,512,785 Matched filter bank 62 1999
 
EASTMAN KODAK COMPANY (2)
4,591,930 Signal processing for high resolution electronic still camera 72 1983
4,791,584 Sub-nyquist interferometry 128 1986
 
EFRATOM TIME AND FREQUENCY PRODUCTS, INC. (2)
5,714,910 Methods and apparatus for digital frequency generation in atomic frequency standards 105 1994
5,721,514 Digital frequency generation in atomic frequency standards using digital phase shifting 110 1996
 
EXELIS INC. (2)
5,729,829 Interference mitigation method and apparatus for multiple collocated transceivers 119 1996
5,901,348 Apparatus for enhancing sensitivity in compressive receivers and method for the same 102 1997
 
GTE Lenkurt Incorporated (2)
4,504,803 Switched capacitor AM modulator/demodulator 106 1982
4,510,467 Switched capacitor DSB modulator/demodulator 89 1982
 
Hughes Aircraft Company (2)
4,470,145 Single sideband quadricorrelator 116 1982
4,740,792 Vehicle location system 307 1986
 
INFINEON TECHNOLOGIES AG (2)
5,953,642 System for contactless power and data transmission 104 1997
6,633,194 Mixer 78 2001
 
INTERSIL CORPORATION (2)
5,493,581 Digital down converter and method 121 1992
5,633,815 Formatter 95 1995
 
KABUSHIKI KAISHA KENWOOD (2)
4,871,987 FSK or am modulator with digital waveform shaping 107 1988
4,855,894 Frequency converting apparatus 101 1988
 
KONINKLIJKE PHILIPS ELECTRONICS N.V. (2)
6,393,070 Digital communication device and a mixer 75 1998
2003/0149,579 Method of increasing functionality of a product 60 2002
 
LOT 41 ACQUISITION FOUNDATION, LLC (2)
5,955,992 Frequency-shifted feedback cavity used as a phased array antenna controller and carrier interference multiple access spread-spectrum transmitter 153 1998
6,686,879 Method and apparatus for transmitting and receiving signals having a carrier interferometry architecture 122 2001
 
Marconi Instruments Limited (2)
4,320,361 Amplitude and frequency modulators using a switchable component controlled by data signals 111 1979
4,914,405 Frequency synthesizer 104 1988
 
MARTINEZ,MICHAEL G. (2)
5,434,546 Circuit for simultaneous amplitude modulation of a number of signals 104 1993
5,463,356 FM band multiple signal modulator 106 1994
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (2)
5,841,811 Quadrature sampling system and hybrid equalizer 110 1996
6,049,573 Efficient polyphase quadrature digital tuner 113 1997
 
MEDIATEK INC. (2)
6,335,656 Direct conversion receivers and filters adapted for use therein 97 1999
2003/0078,011 Method for integrating a plurality of radio systems in a unified transceiver structure and the device of the same 69 2002
 
MICROSOFT CORPORATION (2)
6,169,733 Multiple mode capable radio receiver device 112 1997
7,050,058 Interactive water effects using texture coordinate shifting 15 2005
 
NXP B.V. (2)
5,052,050 Direct conversion FM receiver 119 1989
5,584,068 Direct conversion receiver 143 1995
 
PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA (2)
5,617,451 Direct-conversion receiver for digital-modulation signal with signal strength detection 115 1994
2006/0262,987 Variable length coding method and variable length decoding method 2006
 
PHILIPS ELECTRONICS NORTH AMERICA CORPORATION (2)
5,574,755 I/Q quadraphase modulator circuit 124 1994
6,314,279 Frequency offset image rejection 100 1998
 
RENESAS ELECTRONICS CORPORATION (2)
6,014,551 Arrangement for transmitting and receiving radio frequency signal at two frequency bands 168 1997
6,865,399 Mobile telephone apparatus 68 2002
 
ROBERT BOSCH GMBH (2)
5,900,747 Sampling phase detector 106 1998
6,147,763 Circuitry for processing signals occurring in a heterodyne interferometer 100 1999
 
ROUND ROCK RESEARCH, LLC (2)
4,885,587 Multibit decorrelated spur digital radio frequency memory 110 1988
7,072,433 Delay locked loop fine tune 38 2001
 
SGS-THOMSON MICROELECTRONICS S.R.L. (2)
5,014,304 Method of reconstructing an analog signal, particularly in digital telephony applications, and a circuit device implementing the method 103 1990
RE35494 Integrated active low-pass filter of the first order 102 1994
 
Small Power Communication Systems Research Laboratories Co., Ltd. (2)
5,369,800 Multi-frequency communication system with an improved diversity scheme 124 1992
5,448,602 Diversity radio receiver 112 1993
 
SONY ELECTRONICS INC. (2)
5,675,392 Mixer with common-mode noise rejection 115 1996
6,014,176 Automatic phase control apparatus for phase locking the chroma burst of analog and digital video data using a numerically controlled oscillator 96 1996
 
STC PLC (2)
4,521,892 Direct conversion radio receiver for FM signals 120 1982
4,583,239 Digital demodulator arrangement for quadrature signals 115 1984
 
TELASIC COMMUNICATIONS (2)
5,058,107 Efficient digital frequency division multiplexed signal receiver 97 1989
5,251,218 Efficient digital frequency division multiplexed signal receiver 135 1991
 
The United States of America as represented by the Administrator of the National Aeronautics and Space Administration (2)
5,015,963 Synchronous demodulator 104 1989
6,182,011 Method and apparatus for determining position using global positioning satellites 93 1998
 
The United States of America as represented by the Secretary of the Army (2)
4,563,773 Monolithic planar doped barrier subharmonic mixer 113 1984
5,982,329 Single channel transceiver with polarization diversity 86 1998
 
THOMSON CONSUMER ELECTRONICS, INC. (2)
5,446,421 Local oscillator phase noise cancelling modulation technique 111 1994
5,878,088 Digital variable symbol timing recovery system for QAM 99 1997
 
TRW INC. (2)
4,370,572 Differential sample-and-hold circuit 119 1980
6,813,320 Wireless telecommunications multi-carrier receiver architecture 52 2000
 
YOZAN INC. (2)
5,812,546 Demodulator for CDMA spread spectrum communication using multiple pn codes 102 1997
6,366,765 Receiver 42 1999
 
ZARBANA DIGITAL FUND, LLC (2)
7,194,044 Up/down conversion circuitry for radio transceiver 60 2002
7,212,581 Up / down conversion circuitry for radio transceiver 55 2006
 
AAI CORPORATION (1)
5,764,087 Direct digital to analog microwave frequency signal simulator 105 1995
 
Acrodyne Industries, Inc. (1)
5,724,002 Envelope detector including sample-and-hold circuit controlled by preceding carrier pulse peak(s) 107 1996
 
ADC TELECOMMUNICATIONS, INC. (1)
6,741,650 Architecture for intermediate frequency encoder 65 2000
 
ADVANCED MICRO DEVICES, INC. (1)
5,636,140 System and method for a flexible MAC layer interface in a wireless local area network 136 1995
 
AEL MICROTEL LIMITED (1)
4,481,490 Modulator utilizing high and low frequency carriers 104 1982
 
AEROFLEX LIMITED (1)
5,781,600 Frequency synthesizer 45 1995
 
AEROFLEX PLAINVIEW, INC. (1)
5,970,053 Method and apparatus for controlling peak factor of coherent frequency-division-multiplexed systems 152 1996
 
AGENCE SPATIALE EUROPEENNE (1)
5,630,227 Satellite receiver having analog-to-digital converter demodulation 113 1995
 
AGILENT TECHNOLOGIES, INC. (1)
5,260,970 Protocol analyzer pod for the ISDN U-interface 119 1991
 
ALCATEL (1)
5,926,513 Receiver with analog and digital channel selectivity 108 1997
 
Alcatel Espace (1)
4,885,756 Method of demodulating digitally modulated signals, and apparatus implementing such a method 107 1988
 
ALCATEL USA SOURCING, L.P. (1)
5,909,447 Class of low cross correlation palindromic synchronization sequences for time tracking in synchronous multiple access communication systems 111 1997
 
ALCATEL-LUCENT USA INC. (1)
6,198,941 Method of operating a portable communication device 129 1998
 
ALLIANT TECHSYSTEMS INC. (1)
5,150,124 Bandpass filter demodulation for FM-CW systems 105 1991
 
ALLIEDSIGNAL INC. (1)
5,805,460 Method for measuring RF pulse rise time, fall time and pulse width 79 1997
 
AMERICAN MICROSYSTEMS, INC. (1)
4,210,872 High pass switched capacitor filter section 127 1978
 
AMERICAN NEURALOGIX, INC. (1)
5,218,562 Hamming data correlator having selectable word-length 101 1991
 
AMERICAN RADIO LLC (1)
5,864,754 System and method for radio signal reconstruction using signal processor 116 1996
 
ANALOG DEVICES, INC. (1)
5,495,200 Double sampled biquad switched capacitor filter 120 1993
 
Analytek, Ltd. (1)
4,922,452 10 Gigasample/sec two-stage analog storage integrated circuit for transient digitizing and imaging oscillography 111 1987
 
ANDREW LLC (1)
6,697,603 Digital repeater 201 1999
 
ANRITSU COMPANY (1)
5,113,094 Method and apparatus for increasing the high frequency sensitivity response of a sampler frequency converter 113 1990
 
APHEX LLC (1)
5,483,600 Wave dependent compressor 91 1994
 
AT&T Information Systems Inc. (1)
4,716,376 Adaptive FSK demodulator and threshold detector 125 1985
 
ATC TECHNOLOGIES, LLC (1)
5,454,007 Arrangement for and method of concurrent quadrature downconversion input sampling of a bandpass signal 143 1993
 
ATMEL CORPORATION (1)
5,461,646 Synchronization apparatus for a diversity receiver 98 1995
 
BAKER HUGHES INCORPORATED (1)
5,682,099 Method and apparatus for signal bandpass sampling in measurement-while-drilling applications 128 1995
 
Blaupunkt-Werke GmbH (1)
4,313,222 H-F Portion of TV receiver 49 1980
 
BROADCOM CORPORATION (1)
6,920,311 Adaptive radio transceiver with floating MOSFET capacitors 76 2004
 
BROWN UNIVERSITY (1)
5,638,396 Laser ultrasonics-based material analysis system and method 113 1995
 
Bull HN Information Systems Inc. (1)
5,887,001 Boundary scan architecture analog extension with direct connections 77 1997
 
Burr-Brown Corporation (1)
5,172,019 Bootstrapped FET sampling switch 78 1992
 
CALLAHAN CELLULAR L.L.C. (1)
5,438,692 Direct conversion receiver 134 1993
 
CANADIAN SPACE AGENCY, THE, AN AGENCY OF THE GOVERNMENT OF CANADA (1)
5,592,131 System and method for modulating a carrier frequency 118 1994
 
Cardiac Pacemakers, Inc. (1)
6,076,015 Rate adaptive cardiac rhythm management device using transthoracic impedance 325 1998
 
CEDCOM NETWORK SYSTEMS, PTY. LTD. (1)
5,164,985 Passive universal communicator system 272 1990
 
CELLCO PARTNERSHIP D/B/A VERIZON WIRELESS (1)
5,220,680 Frequency signal generator apparatus and method for simulating interference in mobile communication systems 113 1991
 
CHUNG-SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY (1)
5,901,054 Pulse-width-modulation control circuit 106 1997
 
CIENA CORPORATION (1)
5,006,810 Second order active filters 106 1989
 
CIENCIA, INC. (1)
5,818,582 Apparatus and method for phase fluorometry 135 1997
 
CLARION CO., LTD. (1)
5,293,398 Digital matched filter 163 1992
 
CLEVELAND MEDICAL DEVICES INC. (1)
6,223,061 Apparatus for low power radio communications 89 1997
 
COASES INVESTMENTS BROS. L.L.C. (1)
5,793,818 Signal processing system 164 1995
 
COGNEX CORPORATION (1)
6,608,647 Methods and apparatus for charge coupled device image acquisition with independent integration and readout 88 1998
 
COMSAT CORPORATION (1)
4,943,974 Detection of burst signal transmissions 121 1988
 
CONIFER CORPORATION (1)
5,020,149 Integrated down converter and interdigital filter apparatus and method for construction thereof 124 1988
 
CONVERSANT INTELLECTUAL PROPERTY MANAGEMENT INC. (1)
6,441,659 Frequency-doubling delay locked loop 59 2000
 
CRYSTAL SEMICONDUCTOR CORPORATION (1)
6,560,451 Square wave analog multiplier 60 1999
 
CSEM CENTRE SUISSE D'ELECTRONIQUE ET DE MICROTECHNIQUE SA (1)
5,483,695 Intermediate frequency FM receiver using analog oversampling to increase signal bandwidth 106 1994
 
CSR TECHNOLOGY INC. (1)
5,737,035 Highly integrated television tuner on a single microcircuit 312 1995
 
CTS CORPORATION (1)
5,513,389 Push pull buffer with noise cancelling symmetry 103 1995
 
DELCO ELECTRONICS CORPORATION (1)
5,339,395 Interface circuit for interfacing a peripheral device with a microprocessor operating in either a synchronous or an asynchronous mode 95 1992
 
DIASENSE, ICN. (1)
6,064,054 Synchronous detection for photoconductive detectors 104 1998
 
DREXEL UNIVERSITY (1)
5,465,418 Self-oscillating mixer circuits and methods therefor 104 1994
 
DRS SIGNAL SOLUTIONS, INC. (1)
6,144,236 Structure and method for super FET mixer having logic-gate generated FET square-wave switching signal 110 1998
 
E-SYSTEMS, INC. (1)
4,346,477 Phase locked sampling radio receiver 123 1977
 
EADS SECURE NETWORKS (1)
5,901,349 Mixer device with image frequency rejection 155 1996
 
EATON CORPORATION (1)
4,245,355 Microwave frequency converter 121 1979
 
EDO COMMUNICATIONS AND COUNTERMEASURES SYSTEMS INC. (1)
5,140,699 Detector DC offset compensator 75 1990
 
EEV LIMITED (1)
5,463,357 Wide-band microwave modulator arrangements 108 1994
 
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE (1)
5,559,809 Transmit block up-converter for very small aperture terminal remote station 53 1995
 
ERICSSON AB (1)
6,363,262 Communication device having a wideband receiver and operating method therefor 110 1998
 
ETAT FRANCAIS REPRESENTE PAR LE MINISTRE DELEGUE DES POSTES ET TELECOMMUNICATIONS (CENTRE NATIONAL D'ETUDES DES TELECOMMUNICATIONS) (1)
4,908,579 Switched capacitor sampling filter 105 1988
 
FLUKE CORPORATION (1)
4,965,467 Sampling system, pulse generation circuit and sampling circuit suitable for use in a sampling system, and oscilloscope equipped with a sampling system 105 1989
 
FOVEON, INC. (1)
6,512,544 Storage pixel sensor and array with compression 122 1998
 
FRANCE TELECOM (1)
5,678,220 Device for rejection of the image signal of a signal converted to an intermediate frequency 99 1995
 
FUJITSU COMPOUND SEMICONDUCTOR, INC. (1)
5,903,827 Single balanced frequency downconverter for direct broadcast satellite transmissions and hybrid ring signal combiner 117 1995
 
FUJITSU SEMICONDUCTOR LIMITED (1)
5,896,347 Semiconductor memory system using a clock-synchronous semiconductor device and semiconductor memory device for use in the same 95 1997
 
FUNAI ELECTRIC CO., LTD. (1)
5,777,692 Receiver based methods and devices for combating co-channel NTSC interference in digital transmission 135 1996
 
FUTURE CAPITAL L.L.C. (1)
5,905,433 Trailer communications system 93 1996
 
GENERAL DYNAMICS C4 SYSTEMS, INC. (1)
6,085,073 Method and system for reducing the sampling rate of a signal for use in demodulating high modulation index frequency modulated signals 91 1998
 
GENERAL DYNAMICS DECISION SYSTEMS, INC. (1)
5,517,688 MMIC FET mixer and method 110 1994
 
GENERAL INSTRUMENT CORPORATION (1)
5,131,014 Apparatus and method for recovery of multiphase modulated data 70 1991
 
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Other [Check patent profile for assignment information] (12)
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6,005,903 Digital correlator 108 1996

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
PARKERVISION, INC. (30)
8,295,406 Universal platform module for a plurality of communication protocols 8 2000
7,822,401 Apparatus and method for down-converting electromagnetic signals by controlled charging and discharging of a capacitor 20 2004
7,773,688 Method, system, and apparatus for balanced frequency up-conversion, including circuitry to directly couple the outputs of multiple transistors 26 2004
7,653,145 Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations 25 2005
7,653,158 Gain control in a communication channel 28 2006
7,693,230 Apparatus and method of differential IQ frequency up-conversion 30 2006
7,724,845 Method and system for down-converting and electromagnetic signal, and transforms for same 24 2006
7,936,022 Method and circuit for down-converting a signal 16 2008
7,991,815 Methods, systems, and computer program products for parallel correlation and applications thereof 15 2008
7,937,059 Converting an electromagnetic signal via sub-sampling 17 2008
7,693,502 Method and system for down-converting an electromagnetic signal, transforms for same, and aperture relationships 23 2008
8,407,061 Networking methods and systems 6 2008
7,865,177 Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships 17 2009
7,826,817 Applications of universal frequency translation 21 2009
7,894,789 Down-conversion of an electromagnetic signal with feedback control 17 2009
8,019,291 Method and system for frequency down-conversion and frequency up-conversion 15 2009
8,233,855 Up-conversion based on gated information signal 9 2009
8,446,994 Gain control in a communication channel 7 2009
7,929,638 Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments 16 2010
8,036,304 Apparatus and method of differential IQ frequency up-conversion 15 2010
8,223,898 Method and system for down-converting an electromagnetic signal, and transforms for same 9 2010
8,077,797 Method, system, and apparatus for balanced frequency up-conversion of a baseband signal 16 2010
8,295,800 Apparatus and method for down-converting electromagnetic signals by controlled charging and discharging of a capacitor 8 2010
8,160,534 Applications of universal frequency translation 10 2010
8,340,618 Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships 10 2010
8,224,281 Down-conversion of an electromagnetic signal with feedback control 9 2010
8,190,116 Methods and systems for down-converting a signal using a complementary transistor structure 9 2011
8,229,023 Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments 10 2011
8,190,108 Method and system for frequency up-conversion 9 2011
8,594,228 Apparatus and method of differential IQ frequency up-conversion 1 2011
 
Softronics, Ltd. (1)
8,693,584 Multichannel transmitter and receiver 0 2012
 
UNIVERSITAT BERN (1)
7,620,378 Method and system for frequency up-conversion with modulation embodiments 26 2007

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