Analog/digital converter and voltage comparator capable of fast producing of output offset voltage
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United States of America Patent
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Oct 12, 1999
Grant Date -
N/A
app pub date -
Dec 1, 1997
filing date -
May 23, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An A/D converter includes a sample-hold circuit, A/D converting stages connected in series to the sample-hold circuit, and an encoder/latch circuit which adds 3-bit digital signals issued from the A/D converting stages to each other for outputting a signal of 9 bits. The sample-hold circuit and the A/D converting stages each include a differential amplifier. Differential outputs of each differential amplifier are short-circuited for a predetermined initial period in each sampling period.
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