Electronic digital logic circuitry – Clocking or synchronizing of logic stages or gates
Reexamination Certificate
2011-06-07
2011-06-07
Cho, James (Department: 2819)
Electronic digital logic circuitry
Clocking or synchronizing of logic stages or gates
C326S029000, C327S170000
Reexamination Certificate
active
07956648
ABSTRACT:
Techniques for controlling a driver to reduce data dependent noise, such as simultaneous switching effects and cross-talk effects. A plurality of drivers may each receive a data segment to transmit and a plurality of data segments that other drivers will transmit. A driver controller may adjust the time at which the data segment is transmitted in response to the plurality of data segments that the other drivers will transmit. The adjustment may compensate for simultaneous switching noise and cross-talk by, for example, delaying the transmission of a data segment or changing the slew rate of the signal carrying the data segment.
REFERENCES:
patent: 4859877 (1989-08-01), Cooperman et al.
patent: 5381059 (1995-01-01), Douglas
patent: 6172522 (2001-01-01), Kerr et al.
patent: 6617877 (2003-09-01), Cory et al.
patent: 7705633 (2010-04-01), Pitkethly
patent: 7721137 (2010-05-01), Lin et al.
Matano et al.; “A 1-Gb/s/pin 512-Mb DDRII SDRAM Using a Digital DLL and a Slew-Rate-Controlled Output Buffer”; IEEE Journol of Solid-State Circuits, vol. 38, No. 5, May 2003.
Actel Appliction Note; “Simultaneous Switching Noise and Signal Integrity”; Actel Corporation, Jul. 2003.
Park et al.; “A High-Speed Memory Interface Circuit Tolerant to PVT Variations and Channel Noise”; unknown date.
Kirk; “Clock Management with PLLs and DLLs”; EETimes Online; EETimes.com posted Mar. 28, 2001.
Abramovitch; “Phase-Locked Loops: A Control Centric Tutorial”; Agilent Technologies; Agilent Labs; May 8, 2002; pp. 1-50.
E-learning Resources in Microelectronics; “Signal Integrity in Digital Circuits”, Lesson 3-Ground Bounce and Switching Noise; Jun. 8, 2001.
Blodgett Greg A.
Kwon Chang Ki
Cho James
Fletcher Yoder
Micro)n Technology, Inc.
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