Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2005-03-22
2005-03-22
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
Reexamination Certificate
active
06870424
ABSTRACT:
A folded common cascode circuit with symmetric parallel signal paths from the differential inputs to a single ended output provides a low skew, low jitter, low power, high speed differential in/out amplifier. There is a differential input stage followed by a load or current summation stage with all gates tied together, and then a second differential stage. The dynamic voltage range of the second stage allows for lower Vcc operation while providing improved jitter operation. The signal paths on either side of the differential amplifier are made equal with equal loads along each path. Pairs of complementary NMOS and PMOS transistor pairs with parallel complementary biasing current mirroring stacks on the cascode circuitry have all their gates connected together. The layout maintains symmetrical parallel signal paths and symmetrical amplification and impedance loading from differential input to the differential output. Output inverters provide a higher drive capability.
REFERENCES:
patent: 5801564 (1998-09-01), Gasparik
patent: 5894245 (1999-04-01), Cho
patent: 6052025 (2000-04-01), Chang et al.
patent: 6150883 (2000-11-01), Ivanov
patent: 6236269 (2001-05-01), Hojabri
patent: 6252432 (2001-06-01), Freitas
patent: 6275073 (2001-08-01), Tokuhiro
patent: 6313696 (2001-11-01), Zhang
patent: 6433637 (2002-08-01), Sauer
Chitnis Shailesh
Pradhan Pravas
Cesari and McKenna LLP
Fairchild Semiconductor Corporation
Nguyen Patricia
Paul, Esq. Edwin H.
LandOfFree
Low voltage differential in differential out receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low voltage differential in differential out receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low voltage differential in differential out receiver will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3389910