Successive approximation register analog to digital converter device and signal conversion method
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United States of America Patent
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Oct 1, 2024
Grant Date -
Apr 13, 2023
app pub date -
Jul 5, 2022
filing date -
Oct 13, 2021
priority date (Note) -
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Abstract
A successive approximation register analog to digital converter includes a charge injection digital to analog converter (DAC) circuit, a comparator circuit, and a control logic circuitry. The charge injection DAC circuit includes capacitors that sample input signals to generate first and second signals and charge injection circuits that selectively adjust the first or the second signals according to enable signals and decision signals. The comparator circuit compares the first and second signals to generate the decision signals. The control logic circuitry controls a circuit of the charge injection circuits to adjust the first and the second signals during an initial phase, in order to adjust a switching sequence of the circuit according to the decision signals corresponding to the initial phase, and generates the enable signals according to the decision signals and the adjusted switching sequence during a conversion phase to generate a digital output.
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