Distributed delay-locked-based clock and data recovery systems

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7456670
APP PUB NO 20060198235A1
SERIAL NO

11382807

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Abstract

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A clock and data recovery system using a distributed variable delay line is provided. The clock and data recovery system can use a delay-locked loop methodology to align a local clock with an incoming data stream. The variable delay line can include a transmission line coupled with a plurality of variable capacitors responsive to a control voltage. The variable delay line can also have a ladder configuration of multiple LC subcircuits each having a variable impedance responsive to a control voltage.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
THE REGENTS OF THE UNIVERSITY OF CALIFORNIAOAKLAND, CA6515

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Heydari, Payam Irvine, CA 13 107
Mahanavelu, Ravindran Terrance, CA 2 10

Cited Art Landscape

Patent Info (Count) # Cites Year
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
5912596 Apparatus and method for frequency tuning an LC oscillator in a integrated clock circuit 33 1998
 
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA (1)
* 7057435 Distributed delay-locked-based clock and data recovery systems 8 2004
 
FormFactor, Inc. (1)
6816031 Adjustable delay transmission line 73 2001
 
SAMSUNG ELECTRONICS CO., LTD. (1)
5130564 Signal delay circuit for minimizing the delay time dependence on power supply voltage variation 28 1990
 
OKI ELECTRIC INDUSTRY CO., LTD. (1)
6166572 Voltage-controlled delay line, direct phase controlled voltage-controlled oscillator, clock/data recovery circuit, and clock/data recovery apparatus 79 1998
 
FUJITSU LIMITED (2)
* 5610954 Clock reproduction circuit and elements used in the same 31 1995
* 6064236 Phase detector and timing extracting circuit using phase detector 18 1998
 
SUN MICROSYSTEMS, INC. (1)
5799048 Phase detector for clock synchronization and recovery 58 1996
 
GRASS VALLEY (U.S.) INC. (1)
5164966 NRZ clock and data recovery system employing phase lock loop 36 1991
 
ANALOG DEVICES, INC. (1)
5629652 Band-switchable, low-noise voltage controlled oscillator (VCO) for use with low-q resonator elements 57 1996
 
ORACLE AMERICA, INC. (1)
6028903 Delay lock loop with transition recycling for clock recovery of NRZ run-length encoded serial data signals 21 1997
 
ALLIANCE SEMICONDUCTOR CORPORATION (1)
* 7027548 Delay settings for a wide-range, high-precision delay-locked loop and a delay locked loop implementation using these settings 9 2001
 
MACOM CONNECTIVITY SOLUTIONS, LLC (2)
6771728 Half-rate phase detector with reduced timing requirements 12 2000
* 7103131 System and method for half-rate clock phase detection 4 2002
 
NATIONAL SEMICONDUCTOR CORPORATION (1)
* 4984255 Edge transition insensitive delay line system and method 68 1989
 
RPX CORPORATION (1)
6690243 Multi-phase voltage-controlled oscillator at modulated, operating frequency 28 2001
 
TEXAS INSTRUMENTS INCORPORATED (1)
2004/0036,541 Differential CMOS latch and digital quadrature LO generator using same 18 2002
 
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. (5)
* 5953386 High speed clock recovery circuit using complimentary dividers 63 1996
* 5987085 Clock recovery circuit 45 1997
6008680 Continuously adjustable delay-locked loop 39 1997
6686777 Phase detector having improved timing margins 12 2002
* 7016613 Linear half-rate phase detector and clock and data recovery circuit 8 2004
 
TEKTRONIX, INC. (1)
4701714 Tunable delay line 22 1986
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
ANALOGIES SA (1)
* 2009/0072,916 Integrated Circuit Distributed Oscillator 0 2007
 
Analogies, Inc. (1)
* 8149066 Integrated circuit distributed oscillator 1 2007
 
ORACLE AMERICA, INC. (2)
* 8179208 Interconnect for surfing circuits 1 2008
* 2009/0102,581 INTERCONNECT FOR SURFING CIRCUITS 2 2008
* Cited By Examiner

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