Electronic digital logic circuitry – Signal sensitivity or transmission integrity – Pulse shaping
Reexamination Certificate
2007-08-07
2007-08-07
Cho, James H. (Department: 2819)
Electronic digital logic circuitry
Signal sensitivity or transmission integrity
Pulse shaping
C326S031000
Reexamination Certificate
active
11218988
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: 6233694 (2001-05-01), Allard et al.
patent: 6498511 (2002-12-01), Tamura et al.
patent: 7116135 (2006-10-01), Wang 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 Journal of Solid-State Circuits, vol. 38, No. 5, Ma, no date.
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
Kwon Chang Ki
Cho James H.
Fletcher Yoder
Micro)n Technology, Inc.
LandOfFree
Output driver robust to data dependent noise does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Output driver robust to data dependent noise, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Output driver robust to data dependent noise will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3899083