ANALOG-TO-DIGITAL CONVERTER CIRCUIT
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United States of America Patent
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Issued Date -
Aug 31, 2023
app pub date -
Jul 13, 2021
filing date -
Aug 28, 2020
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Abstract
There is provided an analog-to-digital converter circuit including: a first converter circuit generating a first digital code by performing analog-to-digital conversion on the basis of an input voltage; a second converter circuit generating a second digital code by performing, on the basis of the input voltage and the first digital code, analog-to-digital conversion over a voltage range wider than that. of a least significant. bit of the first converter circuit; an error detector detecting a conversion error of the analog-to-digital conversion on the basis of the first and second digital codes, thereby generating error data indicating a bit having a conversion error and the kind of the conversion error; and a calibration circuit estimating an error factor on the basis of the first and second digital codes and the error data, and performing calibration of a circuit relevant to the estimated error factor on the basis of an estimation result.
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