Current mode analog-to-digital converter (ADC)
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United States of America Patent
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May 1, 2018
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app pub date -
Jan 12, 2017
filing date -
Jan 12, 2017
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Abstract
A current-mode analog-digital conversion (ADC) circuit directly samples and digitizes an input signal in the current domain; the input signal may be a current signal or a photonic signal. Input capacitors may be coupled to the current source by a series of switches and configured to store a target charge. The target charge may be compared to a reference voltage by comparators of the system to generate digital output. The current-mode ADC circuit may be adapted to flash, successive-approximation, and pipeline architectures, or embodied in a photonic receiver incorporating current-mode ADC circuits configured to sample and digitize photonic signals.
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