Hybrid analog-digital phase error detector

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United States of America Patent

PATENT NO 5644743
SERIAL NO

08567387

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A hybrid analog-digital phase error detector (107) is utilized for detecting a phase error between first and second clock signals (132, 104). Digital and analog phase error detectors (108, 116) are connected to the first and second clock signals (132, 104), and are utilized for producing digital and analog phase error values (110, 118). The digital and analog controllers (112, 120) connected to the digital and analog phase error detectors (108, 116) execute digital and analog control algorithms based on the digital and analog phase error values (110, 118) to produce digital and analog control signals (114, 122). A summer (124) connected to the outputs of the digital and analog controllers (112, 120) combines the analog control signal (122) and the digital control signal (114) to produce a composite control signal (126) representing the phase error.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
GOOGLE TECHNOLOGY HOLDINGS LLCMOUNTAIN VIEW, CA24737

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Barrett, Jr Raymond Louis Ft. Lauderdale, FL 16 136
Davis, Walter L Parkland, FL 74 2860
Herold, Barry W Boca Raton, FL 55 1018
Pajunen, Grazyna Anna Delray Beach, FL 3 29

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ROCKWELL INTERNATIONAL CORPORATION (1)
* 4901026 Phase detector circuit having latched output characteristic 15 1988
 
MITEL CORPORATION (1)
* 4803705 Analog phase locked loop 49 1987
 
KOREA TELECOMMUNICATION AUTHORITY (2)
* 5430772 Bit synchronizer for NRZ data 9 1993
* 5525935 High-speed bit synchronizer with multi-stage control structure 30 1995
 
MOTOROLA, INC. (1)
* 5506875 Method and apparatus for performing frequency acquisition in all digital phase lock loop 29 1993
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (2)
* 7571359 Clock distribution circuits and methods of operating same that use multiple clock circuits connected by phase detector circuits to generate and synchronize local clock signals 6 2001
* 2002/0049,936 Clock distribution circuits and methods of operating same that use multiple clock circuits connected by phase detector circuits to generate and synchronize local clock signals 9 2001
 
ROUND ROCK RESEARCH, LLC (11)
7415404 Method and apparatus for generating a sequence of clock signals 4 2005
* 7418071 Method and apparatus for generating a phase dependent control signal 9 2005
7373575 Method and apparatus for generating expect data from a captured bit pattern, and memory device using same 1 2006
7461286 System and method for using a learning sequence to establish communications on a high-speed nonsynchronous interface in the absence of clock forwarding 7 2006
7889593 Method and apparatus for generating a sequence of clock signals 2 2007
7657813 Method and apparatus for generating expect data from a captured bit pattern, and memory device using same 1 2008
7602876 Method and apparatus for generating a phase dependent control signal 8 2008
8107580 Method and apparatus for generating a phase dependent control signal 1 2009
7954031 Method and apparatus for generating expect data from a captured bit pattern, and memory device using same 2 2009
8565008 Method and apparatus for generating a sequence of clock signals 0 2011
8433023 Method and apparatus for generating a phase dependent control signal 0 2012
 
EVERGREEN MICRO DEVICES CO., LTD. (2)
* 8201012 Load adaptive EMI reduction scheme for switching mode power supply 1 2009
* 2010/0275,052 LOAD ADAPTIVE EMI REDUCTION SCHEME FOR SWITCHING MODE POWER SUPPLY 5 2009
 
TEXAS INSTRUMENTS INCORPORATED (1)
6636120 Decimated digital phase-locked loop for high-speed implementation 9 2001
 
SILICON LABORATORIES INC. (2)
7084709 Hybrid analog/digital phase lock loop frequency synthesizer 8 2004
* 7180377 Method and apparatus for a hybrid phase lock loop frequency synthesizer 11 2005
 
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. (2)
8873606 Transceiver including a high latency communication channel and a low latency communication channel 2 2012
9306621 Transceiver including a high latency communication channel and a low latency communication channel 9 2014
* Cited By Examiner