Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Reexamination Certificate
2005-06-28
2005-06-28
Cunningham, Terry D. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
C327S053000, C327S072000, C330S009000, C330S253000
Reexamination Certificate
active
06911858
ABSTRACT:
A comparator with an offset canceling function and a D/A conversion apparatus capable of canceling an input/output offset with high accuracy using this comparator. To eliminate unbalance between right and left currents of the differential circuit making up the comparator, the phase of a single end output signal of the differential circuit is inverted and the inverted signal is fed back to one substrate of the differential pair MOS transistors as a substrate bias. Threshold voltages of the MOS transistors are changed and the current capacities of the transistors are adjusted in this way.
REFERENCES:
patent: 5017805 (1991-05-01), Kase
patent: 5124663 (1992-06-01), McEntarfer et al.
patent: 6064262 (2000-05-01), Wang
patent: 6118395 (2000-09-01), Kim
patent: 6362687 (2002-03-01), Cox
patent: 6448836 (2002-09-01), Kokubun et al.
patent: 6586990 (2003-07-01), Udo et al.
patent: 6614301 (2003-09-01), Casper et al.
patent: 6-85562 (1994-03-01), None
patent: 11234130 (1999-08-01), None
English Language Abstract of JP 6-85562.
English Language Abstract of JP 11-234130.
Cunningham Terry D.
Greenblum & Bernstein P.L.C.
Matsushita Electric - Industrial Co., Ltd.
Tra Quan
LandOfFree
Comparator with offset canceling function and D/A conversion... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Comparator with offset canceling function and D/A conversion..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparator with offset canceling function and D/A conversion... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3519453