Analog-to-Digital Converter Non-Linearity Model Estimation Using Single-Bit Digital-to-Analog Converter
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United States of America
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Mar 20, 2025
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Sep 19, 2023
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Sep 19, 2023
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Abstract
A training signal generator for forming an input signal for an ADC-under-test includes a one-bit DAC and an analog low-pass filter. The one-bit DAC converts a binary sequence into a DAC output signal that is then filtered by the analog low-pass filter to form an ADC input signal. The ADC-under-test converts the ADC input signal into an ADC output signal. A digital low-pass filter converts the binary sequence into a plurality of samples. A digital signal processing system processes the plurality of samples and the ADC output signal to form an estimate of the ADC input signal. An ADC linearizer may then be trained to characterize a non-linear impairment of the ADC-under-test responsive to a comparison of the estimate of the ADC input signal and the ADC output signal.
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