US Patent No: 6,931,086

Number of patents in Portfolio can not be more than 2000

Method and apparatus for generating a phase dependent control signal

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ALSO PUBLISHED AS: 20020154721
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Abstract

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A phase detector generates a phase dependent control signal according to the phase relationship between a first and second clock signal. The phase detector includes first and second phase detector circuits receiving the first and second clock signals and generating select signals having duty cycles corresponding to the phase relationship between the clock edges of the first and second clock signals. The phase detector also includes a charge pump that receives select signals from the phase detector circuits and produces an increasing or decreasing control signal when the first and second clock signals do not have the predetermined phase relationship, and a non-varying control signal when the first and second clock signals do have the predetermined phase relationship. The control signal may be used to adjust the delay value of a voltage-controlled delay circuit in order to adjust the phase relationship between the first and second clock signals to have a predetermined phase relationship.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ROUND ROCK RESEARCH, LLCBOISE, ID3672

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Harrison, Ronnie M Boise, ID 62 1003

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ROUND ROCK RESEARCH, LLC (28)
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5,636,173 Auto-precharge during bank selection 172 1995
5,692,165 Memory controller with low skew control signal 165 1995
5,627,791 Multiple bank memory with auto refresh to specified bank 203 1996
6,115,318 Clock vernier adjustment 78 1996
5,852,378 Low-skew differential signal converter 110 1997
5,920,518 Synchronous clock generator including delay-locked loop 117 1997
5,940,608 Method and apparatus for generating an internal clock signal that is synchronized to an external clock signal 116 1997
5,831,929 Memory device with staggered data paths 181 1997
6,484,244 Method and system for storing and processing multiple memory commands 27 1997
6,005,823 Memory device with pipelined column address path 61 1997
6,173,432 Method and apparatus for generating a sequence of clock signals 95 1997
5,953,284 Method and apparatus for adaptively adjusting the timing of a clock signal used to latch digital signals, and memory device using same 85 1997
6,011,732 Synchronous clock generator including a compound delay-locked loop 210 1997
5,926,047 Synchronous clock generator including a delay-locked loop signal loss detector 70 1997
5,940,609 Synchronous clock generator including a false lock detector 103 1997
6,101,197 Method and apparatus for adjusting the timing of signals over fine and coarse ranges 138 1997
6,269,451 Method and apparatus for adjusting data timing by delaying clock signal 44 1998
6,016,282 Clock vernier adjustment 243 1998
6,338,127 Method and apparatus for resynchronizing a plurality of clock signals used to latch respective digital signals, and memory device using same 60 1998
6,029,250 Method and apparatus for adaptively adjusting the timing offset between a clock signal and digital signals transmitted coincident with that clock signal, and memory device and system using same 349 1998
6,430,696 Method and apparatus for high speed data capture utilizing bit-to-bit timing correction, and memory device using same 146 1998
6,026,050 Method and apparatus for adaptively adjusting the timing of a clock signal used to latch digital signals, and memory device using same 165 1999
6,378,079 Computer system having memory device with adjustable data clocking 70 2000
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RAMBUS INC. (22)
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5,390,308 Method and apparatus for address mapping of dynamic random access memory 161 1992
5,254,883 Electrical current source circuitry for a bus 349 1992
5,268,639 Testing timing parameters of high speed integrated circuit devices 118 1992
5,337,285 Method and apparatus for power control in devices 143 1993
5,451,898 Bias circuit and differential amplifier having stabilized output swing 130 1993
5,432,823 Method and circuitry for minimizing clock-data skew in a bus system 341 1994
5,430,676 Dynamic random access memory system 119 1994
5,513,327 Integrated circuit I/O using a high performance bus interface 202 1994
5,485,490 Method and circuitry for clock synchronization 248 1994
5,446,696 Method and apparatus for implementing refresh in a synchronous DRAM system 122 1994
5,578,940 Modular bus with single or double parallel termination 156 1995
5,488,321 Static high speed comparator 105 1995
5,621,340 Differential comparator for amplifying small swing signals to a full swing output 105 1995
5,614,855 Delay-locked loop 291 1995
5,657,481 Memory device with a phase locked loop circuitry 114 1996
6,125,157 Delay-locked loop circuitry for clock delay adjustment 203 1997
6,014,042 Phase detector using switched capacitors 34 1998
6,101,152 Method of operating a synchronous memory device 131 1998
6,067,592 System having a synchronous memory device 62 1999
 
MICRON TECHNOLOGY, INC. (20)
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5,128,560 Boosted supply output driver circuit for driving an all N-channel output stage 209 1991
5,278,460 Voltage compensating CMOS input buffer 134 1992
5,274,276 Output driver circuit comprising a programmable circuit for determining the potential at the output node and the method of implementing the circuit 144 1992
5,311,481 Wordline driver circuit having a directly gated pull-down device 113 1992
5,347,179 Inverting output driver circuit for reducing electron injection into the substrate 112 1993
5,506,814 Video random access memory device and method implementing independent two WE nibble control 100 1993
5,361,002 Voltage compensating CMOS input buffer 127 1993
5,400,283 RAM row decode circuitry that utilizes a precharge circuit that is deactivated by a feedback from an activated word line driver 99 1993
5,497,355 Synchronous address latching for memory arrays 49 1994
5,555,429 Multiport RAM based multiprocessor 52 1995
5,508,638 Low current redundancy fuse assembly 116 1995
5,578,941 Voltage compensating CMOS input buffer circuit 108 1995
5,657,289 Expandable data width SAM for a multiport RAM 56 1995
5,805,931 Programmable bandwidth I/O port and a communication interface using the same port having a plurality of serial access memories capable of being configured for a variety of protocols 53 1996
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TEXAS INSTRUMENTS INCORPORATED (8)
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5,576,645 Sample and hold flip-flop for CMOS logic 95 1995
5,572,722 Time skewing arrangement for operating random access memory in synchronism with a data processor 73 1995
5,841,707 Apparatus and method for a programmable interval timing generator in a semiconductor memory 71 1996
 
INTEL CORPORATION (7)
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5,621,690 Nonvolatile memory blocking architecture and redundancy 138 1995
5,652,530 Method and apparatus for reducing clock-data skew by clock shifting 72 1995
5,621,739 Method and apparatus for buffer self-test and characterization 114 1996
5,990,719 Adaptive filtering scheme for sampling phase relations of clock networks 51 1997
6,298,450 Detecting states of signals 38 1999
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (7)
5,020,023 Automatic vernier synchronization of skewed data streams 72 1989
5,272,729 Clock signal latency elimination network 103 1991
5,557,224 Apparatus and method for generating a phase-controlled clock signal 51 1994
5,577,236 Memory controller for reading data from synchronous RAM 158 1994
5,568,075 Timing signal generator 63 1995
5,673,005 Time standard circuit with delay line oscillator 39 1995
5,712,580 Linear phase detector for half-speed quadrature clocking architecture 80 1996
 
MITSUBISHI DENKI KABUSHIKI KAISHA (7)
4,953,128 Variable delay circuit for delaying input data 139 1987
5,313,431 Multiport semiconductor memory device 76 1992
5,552,727 Digital phase locked loop circuit 84 1994
5,568,077 Latch circuit 90 1995
5,668,774 Dynamic semiconductor memory device having fast operation mode and operating with low current consumption 66 1996
5,666,313 Semiconductor memory device with complete inhibition of boosting of word line drive signal and method thereof 28 1996
5,708,611 Synchronous semiconductor memory device 89 1997
 
KABUSHIKI KAISHA TOSHIBA (5)
5,233,564 Multiport memory with test signal generating circuit controlling data transfer from RAM port to SAM port 49 1991
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MOTOROLA, INC. (5)
4,508,983 MOS Analog switch driven by complementary, minimally skewed clock signals 60 1983
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5,256,989 Lock detection for a phase lock loop 77 1991
5,428,317 Phase locked loop with low power feedback path and method of operation 56 1994
 
CREDENCE SYSTEMS CORPORATION (4)
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5,712,883 Clock signal distribution system 61 1996
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FUJITSU SEMICONDUCTOR LIMITED (4)
5,668,763 Semiconductor memory for increasing the number of half good memories by selecting and using good memory blocks 109 1996
5,740,123 Semiconductor integrated circuit for changing pulse width according to frequency of external signal 73 1997
6,147,905 Non-volatile semiconductor memory device 46 1999
6,147,916 Semiconductor memory device with precharge voltage correction circuit 58 1999
 
NATIONAL SEMICONDUCTOR CORPORATION (4)
4,984,255 Edge transition insensitive delay line system and method 65 1989
5,304,952 Lock sensor circuit and method for phase lock loop circuits 56 1993
6,285,726 10/100 mb clock recovery architecture for switches, repeaters and multi-physical layer ports 67 1998
6,194,917 XOR differential phase detector with transconductance circuit as output charge pump 20 1999
 
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. (3)
5,283,631 Programmable capacitance delay element having inverters controlled by adjustable voltage to offset temperature and voltage supply variations 108 1991
5,473,639 Clock recovery apparatus with means for sensing an out of lock condition 67 1993
5,581,197 Method of programming a desired source resistance for a driver stage 114 1995
 
CONVERSANT INTELLECTUAL PROPERTY MANAGEMENT INC. (3)
5,946,244 Delay-locked loop with binary-coupled capacitor 127 1997
6,327,318 Process, voltage, temperature independent switched delay compensation scheme 57 1998
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ELPIDA MEMORY, INC. (3)
5,638,335 Semiconductor device 90 1996
5,781,499 Semiconductor memory device 55 1996
5,768,177 Controlled delay circuit for use in synchronized semiconductor memory 62 1997
 
HITACHI, LTD. (3)
4,746,996 Skew error correction circuit for video signal reproducing apparatus 36 1985
5,281,865 Flip-flop circuit 123 1991
5,794,020 Data transfer apparatus fetching reception data at maximum margin of timing 61 1996
 
NEC CORPORATION (3)
5,572,557 Semiconductor integrated circuit device including PLL circuit 64 1994
5,764,092 Delay clock generator for generating a plurality of delay clocks delaying the basic clock 63 1996
5,631,872 Low power consumption semiconductor dynamic random access memory device by reusing residual electric charge on bit line pairs 93 1996
 
NEC ELECTRONICS CORPORATION (3)
5,315,269 Phase-locked loop 60 1992
5,563,546 Selector circuit selecting and outputting voltage applied to one of first and second terminal in response to voltage level applied to first terminal 66 1994
5,424,687 PLL frequency synthesizer and PLL frequency synthesizing method capable of obtaining high-speed lock-up and highly-reliable oscillation 54 1994
 
RENESAS ELECTRONICS CORPORATION (3)
5,420,544 Semiconductor integrated circuit, method of designing the same and method of manufacturing the same 137 1993
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UNISYS CORPORATION (3)
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ADVANCED MICRO DEVICES, INC. (2)
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FREESCALE SEMICONDUCTOR, INC. (2)
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FUJITSU LIMITED (2)
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5,675,588 Testing apparatus for transmission system 51 1995
 
LAPIS SEMICONDUCTOR CO., LTD. (2)
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5,751,665 Clock distributing circuit 93 1996
 
LOCKHEED MARTIN CORPORATION (2)
5,122,690 Interface circuits including driver circuits with switching noise reduction 167 1990
5,168,199 Horizontal linearity correction circuitry for cathode ray tube display 29 1991
 
LSI LOGIC CORPORATION (2)
5,953,386 High speed clock recovery circuit using complimentary dividers 61 1996
5,872,959 Method and apparatus for parallel high speed data transfer 75 1996
 
PARADYNE CORPORATION (2)
5,898,674 System and method for performing non-disruptive diagnostics through a frame relay circuit 77 1997
6,038,219 User-configurable frame relay network 111 1997
 
SAMSUNG ELECTRONICS CO., LTD. (2)
5,062,082 Semiconductor memory device with delay in address predecoder circuit independent from ATD 46 1991
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SGS-THOMSON MICROELECTRONICS, INC. (2)
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VLSI TECHNOLOGY, INC. (2)
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5,223,755 Extended frequency range variable delay locked loop for clock synchronization 159 1990
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ACTICON TECHNOLOGIES LLC (1)
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AMERICAN TELEPHONE AND TELEGRAPH COMPANY (1)
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Anico Research, Ltd. Inc. (1)
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APPLE INC. (1)
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AT&T Bell Laboratories (1)
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AT&T IPM CORP. (1)
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BELL COMMUNICATIONS RESEARCH, INC. (1)
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Burr-Brown Corporation (1)
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FRANCE TELECOM (1)
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GLOBALFOUNDRIES INC. (1)
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HEWLETT-PACKARD COMPANY (1)
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HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
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5,737,342 Method for in-chip testing of digital circuits of a synchronously sampled data detection channel 83 1996
 
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Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
MICRON TECHNOLOGY, INC. (5)
7,180,370 CMOS amplifiers with frequency compensating capacitors 2 2004
7,417,505 CMOS amplifiers with frequency compensating capacitors 0 2006
7,202,739 CMOS amplifiers with frequency compensating capacitors 2 2006
7,339,431 CMOS amplifiers with frequency compensating capacitors 2 2007
7,705,677 CMOS amplifiers with frequency compensating capacitors 3 2008
 
ROUND ROCK RESEARCH, LLC (4)
7,889,593 Method and apparatus for generating a sequence of clock signals 1 2007
8,107,580 Method and apparatus for generating a phase dependent control signal 1 2009
8,565,008 Method and apparatus for generating a sequence of clock signals 0 2011
8,433,023 Method and apparatus for generating a phase dependent control signal 0 2012
 
HITACHI, LTD. (1)
8,456,205 Phase-frequency comparator and serial transmission device 0 2011
 
HYNIX SEMICONDUCTOR INC. (1)
7,826,583 Clock data recovery apparatus 2 2007
 
INTEL CORPORATION (1)
7,334,148 Optimization of integrated circuit device I/O bus timing 2 2004
 
LSI LOGIC CORPORATION (1)
7,020,793 Circuit for aligning signal with reference signal 10 2003
 
NATIONAL CHUNG CHENG UNIVERSITY (1)
7,756,236 Phase detector 0 2007

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