Station scan method and apparatus for radio receivers

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO

6389270

SERIAL NO

09266418

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

Station scan circuitry for a radio-frequency receiver and corresponding methods are disclosed that efficiently determine the presence of a station on available channels. The station scan circuitry includes circuitry that determines if the signal power on a given channel exceeds a threshold value. Additional circuitry compares the channel signal strength and the adjacent channel signal to determine if a ratio of the two exceeds a threshold level. If both the signal power and the signal strength ratio are sufficient, the station scan circuitry indicates that a station has been found. To make the signal strength comparison, the station scan circuitry includes circuitry for determining a post-filter signal strength and a pre-filter signal strength for the received signal.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
CIRRUS LOGIC, INC.AUSTIN, TX1295

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chan, Brian P Lum Shue Austin, TX 4 47
Nohrden, James M Austin, TX 9 167

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Shintom Co., Ltd. (1)
5740523 Radio receiver 13 1995
 
Blaupunkt-Werke GmbH (4)
* 4476581 FM Receiver with subcarrier decoding circuit 7 1982
4688110 Method and apparatus for recording a video signal without loss of a sound signal recorded on the same tracks 4 1985
* 5430890 Radio receiver for mobile reception with sampling rate oscillator frequency being an integer-number multiple of reference oscillation frequency 46 1992
* 5339455 Radio receiver adjacent-channel interference suppression circuit 70 1993
 
Sencore, Inc. (1)
4823390 FM stereo generator 4 1988
 
SONY CORPORATION (1)
* 5909644 AM radio receiver 10 1996
 
U.S. PHILIPS CORPORATION (1)
* 5548831 FM Receiver having multiple IF stages 35 1993
 
FREESCALE SEMICONDUCTOR, INC. (1)
* 6192089 Electronic circuit and method for automatic frequency control 15 1998
 
VISTEON GLOBAL TECHNOLOGIES, INC. (1)
* 5613230 AM receiver search tuning with adaptive control 17 1995
 
SAMSUNG ELECTRONICS CO., LTD. (1)
* 5751806 Audio information dissemination using various transmission modes 156 1996
 
Nippon Gakki Seizo Kabushiki Kaisha (1)
4404430 FM Stereo demodulation circuit with voltage dividing and multiplexing techniques 12 1981
 
USA DIGITAL RADIO, INC. (1)
4698670 Cable stereo apparatus 63 1986
 
MOTOROLA, INC. (1)
* 4461026 Radio with audio graphic equalizer 11 1981
 
GENERAL INSTRUMENT CORPORATION (GIC-4) (2)
4646150 Apparatus and method for stereo television sound 24 1986
4821097 Apparatus and method for providing digital audio on the sound carrier of a standard television signal 157 1987
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
CIRRUS LOGIC, INC. (1)
* 6694026 Digital stereo recovery circuitry and method for radio receivers 21 1999
 
Other [Check patent profile for assignment information] (3)
* 7877069 Method and apparatus for masking program content 0 2005
* 2005/0227,651 METHOD AND APPARATUS FOR MASKING PROGRAM CONTENT 0 2005
* 2010/0105,349 Rf signal sampling apparatus and method 2 2007
 
PANASONIC AUTOMOTIVE SYSTEMS COMPANY OF AMERICA, DIVISION OF PANASONIC CORPORATION OF NORTH AMERICA (2)
* 8406715 Method and apparatus for dynamically adapting FM tuner sensitivity to a local environment for a single-tuner system 1 2008
* 2009/0247,099 Method and apparatus for dynamically adapting FM tuner sensitivity to a local environment for a single-tuner system 7 2008
 
FUTUREWEI TECHNOLOGIES, INC. (2)
* 8077676 System and method for wireless channel sensing 3 2007
* 2008/0165,680 SYSTEM AND METHOD FOR WIRELESS CHANNEL SENSING 29 2007
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (2)
* 7369825 Selection of radio station based on preferred program content 12 2001
* 2003/0032,399 Selection of radio station based on preferred program content 9 2001
 
TEXAS INSTRUMENTS INCORPORATED (2)
* 7003276 Subsampling communication receiver architecture with gain control and RSSI generation 6 2002
* 2002/0177,421 Subsampling communication receiver architecture with gain control and RSSI generation 8 2002
 
NORTH STAR INNOVATIONS INC. (4)
* 6868129 Demodulator for a radio receiver and method of operation 12 2001
* 2002/0126,771 Demodulator for a radio receiver and method of operation 2 2001
7031680 Stop-on-station method and apparatus 2 2002
* 2004/0110,478 Stop-on-station method and apparatus 1 2002
 
MOTOROLA, INC. (1)
* 2006/0153,141 Method and apparatus for acquiring a carrier frequency in a CDMA communication system 5 2005
 
SILICON LABORATORIES INC. (2)
7957696 System and method for selecting channels for short range transmissions to broadcast receivers 3 2006
* 2008/0076,352 System and method for selecting channels for short range transmissions to broadcast receivers 6 2006
* Cited By Examiner