Signal path linearization
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United States of America Patent
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Jul 2, 2019
Grant Date -
Jun 20, 2019
app pub date -
Dec 18, 2017
filing date -
Dec 18, 2017
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Abstract
To address non-linearity, an on-chip linearization scheme is implemented along with an analog-to-digital converter (ADC) to measure and correct/tune for non-linearities and/or other non-idealities of the signal path having the ADC. The on-chip linearization scheme involves generating one or more test signals using an on-chip digital-to-analog converter (DAC) and providing the one or more test signals as input to the signal path to be linearized, and estimating non-linearity based on the one or more test signals and the output of the ADC. Test signals can include single-tone signals, multi-tone signals, and wideband signals spread over a range of frequencies. A time-delayed interleaving clocking scheme can be used to achieve a higher data rate for coefficient estimation without having to increase the sample rate of the ADC.
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