CONTINUOUS-TIME ADC CALIBRATION TECHNIQUES
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United States of America
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Oct 31, 2024
app pub date -
Apr 26, 2023
filing date -
Apr 26, 2023
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Abstract
CT ADCs based on continuous-time residue generation systems require accurate estimation of analog transfer functions. This is done by using a pseudo random bit sequence, injected using a DAC, that traverses the transfer function to be measured. Mismatch in the injection DAC introduces errors in the transfer function estimation and results in poor NSD at the ADC output. Techniques are described to improve the accuracy of the transfer function estimate despite DAC mismatch and despite the presence of an input signal.
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