AD Converter
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United States of America Patent
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Issued Date -
Jan 5, 2023
app pub date -
Dec 10, 2019
filing date -
Dec 10, 2019
priority date (Note) -
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Abstract
An AD converter includes: an integration unit 22 that uses an input voltage as an initial value and repeats an operation of integrating one or both of two types of unit voltages with the input voltage, thereby generating an integrated voltage; a switching threshold voltage unit 23 that includes two types of threshold voltages causing the operation of integrating to be terminated; a comparator 24 that compares the integrated voltage with the threshold voltages; an integration determination unit 11 that, before the operation of integrating is started, causes the comparator 24 to compare the input voltage with a rough adjustment threshold voltage corresponding to a larger one of the unit voltages; a unit voltage switching control unit 12 that, when the rough adjustment threshold voltage is larger than the input voltage, controls the integration unit 22 to generate the integrated voltage by using the two types of unit voltages; and a single unit voltage control unit 13 that, when the rough adjustment threshold voltage is smaller than the input voltage, controls the integration unit 22 to generate the integrated voltage by using only a smaller one of the unit voltages.
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