Differential comparator, analog/digital conversion apparatus...

Details Differential comparator, analog/digital conversion apparatus... Differential comparator, analog/digital conversion apparatus...

2006-12-05

2006-12-05

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

Reexamination Certificate

active

07145494

ABSTRACT:
A differential comparator which outputs positive and/or negative logic signals to an output terminal according to the coincidence
on-coincidence of first and second input signal levels inputted to first and second input terminals, respectively, comprises an offset cancel function composed of an offset capacitor device provided on the differential comparator side of the first and second terminals, a first switch for short-circuiting the first and second input terminals in such a way as to form a closed loop including the offset capacitor device, and a second switch for short-circuiting both the connection point between the offset capacitor device and the differential comparator, and the output terminal.

REFERENCES:
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patent: 5332931 (1994-07-01), Crispie et al.
patent: 2005/0052308 (2005-03-01), Suzuki et al.
patent: 2000-261602 (2000-09-01), None
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patent: 2000-287137 (2000-10-01), None
patent: 2002-218324 (2002-08-01), None
patent: 2003-91817 (2003-12-01), None

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