High input impedance, high gain CMOS strobed comparator
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United States of America Patent
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-
Jan 5, 1988
Grant Date -
N/A
app pub date -
Nov 14, 1986
filing date -
Nov 14, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A CMOS high gain strobed comparator comprising a cascoded input differential stage with current mirror loads. The DC biasing for the input stage cascode devices is set by a replica biasing technique. The loads to the input differential stage are simple current mirrors which drive a set of cross-coupled devices that form a latch. The high gain of the comparator is realized in the second stage. The differential output of the comparator drives a second latch. This second cross-coupled latch stores and maintains the comparator data even after the strobe signal destroys the data of the differential output.
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