Miscellaneous active electrical nonlinear devices – circuits – and – Specific input to output function – Combining of plural signals
Reexamination Certificate
2005-10-04
2005-10-04
Wells, Kenneth B. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific input to output function
Combining of plural signals
C327S116000
Reexamination Certificate
active
06952127
ABSTRACT:
Digital phase mixers with enhanced speed are provided. A phase mixer generates a signal having a phase between the phases of two input signals based on select signals. The propagation delay of the output signal is reduced by using a first voltage source to drive the input signals and the output signal and a second voltage source, having a higher voltage than the first voltage source, to drive the select signals. The higher voltage source reduces the impedance of each transistor driven by the select signals, thus reducing the propagation delay at the output of the phase mixer. For a non-differential digital phase mixer, the propagation delay is reduced in the rising edges of the output signal. For a differential digital phase mixer, the propagation delay is reduced in the rising and falling edges of the output signal.
REFERENCES:
patent: 4985639 (1991-01-01), Renfrow et al.
patent: 5355097 (1994-10-01), Scott et al.
patent: 5463337 (1995-10-01), Leonowich
patent: 5663665 (1997-09-01), Wang et al.
patent: 5751665 (1998-05-01), Tanoi
patent: 5789927 (1998-08-01), Belcher
patent: 5872488 (1999-02-01), Lai
patent: 6100736 (2000-08-01), Wu et al.
patent: 6194947 (2001-02-01), Lee et al.
patent: 6295328 (2001-09-01), Kim et al.
patent: 6313688 (2001-11-01), Lee et al.
patent: 6326826 (2001-12-01), Lee et al.
patent: 6366148 (2002-04-01), Kim
patent: 6393083 (2002-05-01), Beukema
patent: 6512408 (2003-01-01), Lee et al.
patent: 6573771 (2003-06-01), Lee et al.
patent: 6618283 (2003-09-01), Lin
patent: 6642760 (2003-11-01), Alon et al.
patent: 6661863 (2003-12-01), Toosky
patent: 6762633 (2004-07-01), Lee
patent: 6768361 (2004-07-01), Kwak
patent: 6812753 (2004-11-01), Lin
patent: 2003/0219088 (2003-11-01), Kwak
patent: 2004/0217789 (2004-11-01), Kwak
Jong-Tae Kwak,A Low Cost High Performance Register-Controlled Digital DLL for 1 Gbps ×32 DDR SDRAM, The 8th Korean Conference on Semiconductors, Feb. 2001.
Ramin Farjad-Rad,A Low-Power Multiplying DLL for Low-Jitter Multigigahertz Clock Generation in Highly Integrated Digital Chips, IEEE Journal of Solid-State Circuits, vol. 37,. No. 12, Dec. 2002, p. 1804-1812.
Fish & Neave IP Group of Ropes & Gray LLP
Mak Evelyn C.
Micro)n Technology, Inc.
Wells Kenneth B.
LandOfFree
Digital phase mixers with enhanced speed does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital phase mixers with enhanced speed, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital phase mixers with enhanced speed will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3470231