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

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, ID3698

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Harrison, Ronnie M Boise, ID 62 1052

Cited Art Landscape

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* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
ROUND ROCK RESEARCH, LLC (4)
* 7,889,593 Method and apparatus for generating a sequence of clock signals 2 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
 
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. (1)
* 7,020,793 Circuit for aligning signal with reference signal 10 2003
 
INTEL CORPORATION (1)
* 7,334,148 Optimization of integrated circuit device I/O bus timing 2 2004
 
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 3 2007
7,705,677 CMOS amplifiers with frequency compensating capacitors 4 2008
 
NATIONAL CHUNG CHENG UNIVERSITY (1)
* 7,756,236 Phase detector 0 2007
 
HYNIX SEMICONDUCTOR INC. (1)
* 7,826,583 Clock data recovery apparatus 9 2007
 
THALES (1)
* 2010/0208,773 Auto-Calibration Filtering Device 0 2009
 
HITACHI, LTD. (2)
* 8,456,205 Phase-frequency comparator and serial transmission device 1 2011
* 2011/0175,648 PHASE-FREQUENCY COMPARATOR AND SERIAL TRANSMISSION DEVICE 1 2011
* Cited By Examiner

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