Analog-to-digital converter circuit calibration system
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United States of America Patent
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Jun 12, 2018
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app pub date -
Jul 24, 2017
filing date -
Jul 24, 2017
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Abstract
In various embodiments, at least one analog-to-digital converter (ADC) channel circuit may be used to convert an analog input signal into an output digital signal. A comparator threshold adjustment circuit may pseudorandomly modify at least one comparator threshold. A postprocessing circuit may identify, based on outputs of the ADC channel circuits, an ADC coefficient and may modify an output digital signal based on the ADC coefficient. As a result, the ADC channel circuits may more accurately convert the analog input signal into an output digital signal, as compared to a system that uses ADC channel circuits but does not include a postprocessing circuit. Further, a similar result may be obtained, as compared to a system that uses a higher gain amplifier, a higher speed amplifier, or both, but does not modify the one or more outputs.
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