AD CONVERTER, AD CONVERSION DEVICE, PHOTOELECTRIC CONVERSION APPARATUS, IMAGING SYSTEM, AND AD CONVERSION METHOD
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United States of America Patent
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Issued Date -
Jun 25, 2015
app pub date -
Dec 22, 2014
filing date -
Dec 25, 2013
priority date (Note) -
Abandoned
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Abstract
In a case where a magnitude of an analog signal falls below a first threshold value, a comparator compares the analog signal with a first reference signal so as to obtain a p-bit digital signal. In a case where the magnitude of the analog signal exceeds the first threshold value, the comparator compares the analog signal with a second reference signal, which has a higher rate of change relative to time than the first reference signal, so as to obtain a q-bit digital signal, where q is less than p.
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