Fast, low offset ground sensing comparator

Details Fast, low offset ground sensing comparator Fast, low offset ground sensing comparator

2009-01-26

2010-02-02

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S053000, C327S057000, C327S063000, C327S065000

Reexamination Certificate

active

07656199

ABSTRACT:
A fast, accurate, low offset comparator may be configured with multiple gain stages. A low gain, low input impedance, and fully differential common-gate amplifier may be configured as a first stage in the multi-stage comparator, providing a wide bandwidth for small power consumption. The inputs of the comparator may comprise a pair of differential inputs at respective source terminals of gate-coupled metal oxide semiconductor (MOS) devices configured in the input stage of the common-gate amplifier. A pair of differential outputs of the first stage may be coupled to a pair of differential inputs of a second stage, which may be a differential input current-mirror amplifier that may perform differential to single-ended conversion. The single-ended output of the second stage may serve as the input into a latch, which may be a bistable set-reset (SR) latch configured to increase the gain and response time while protecting against multiple switching, with the single-ended output of the latch configured as the output of the comparator.

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Wikipedia—Voltage, http://en.wikipedia.org/wiki/voltage.
Wikipedia—Comparator, http://en.wikipedia.org/wiki/Comparator.

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