Direct-digitizing, self stabilizing analog to digital converter
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United States of America Patent
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Nov 25, 1997
Grant Date -
N/A
app pub date -
May 21, 1996
filing date -
May 21, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An n-bit analog to digital, (A/D), converter utilizes n comparators, and n internal digital to analog, (D/A) converters. The n D/A converters have the same full-scale output, and the same absolute accuracy in terms of voltage or current, but have n different resolutions ranging consecutively from a 1-bit D/A converter to an n-bit D/A converter. The n-bit A/D converter is divisible into n stages, ranging consecutively from a first stage containing the 1-bit D/A converter and a first comparator, to an n-th stage containing the n-bit D/A converter and an n-th comparator. The least significant bit input terminal of each D/A converter is connected to a logic high level. In each stage, an analog input signal is compared with a reference provided by a D/A converter.
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