Analog/digital conversion circuit
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United States of America Patent
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Mar 28, 2017
Grant Date -
Sep 22, 2016
app pub date -
Mar 9, 2016
filing date -
Mar 16, 2015
priority date (Note) -
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Abstract
According to one embodiment, a first AD converter converts a first voltage into a first digital signal. A voltage/time conversion circuit acquires a residual corresponding to a difference between the first voltage and a result of having converted the first digital signal into an analog signal and converts the residual into a time signal according to a voltage in a first capacitor. A time/voltage conversion circuit converts the time signal into a voltage signal according to a voltage in a second capacitor. A second AD converter converts the voltage signal into a second digital signal. A digital processing circuit outputs a third digital signal to adjust a current value of first or the second current sources based on the second digital signal.
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