SUCCESSIVE-APPROXIMATION TYPE AD CONVERTER AND PIPELINE TYPE AD CONVERTER
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United States of America Patent
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Nov 10, 2020
Grant Date -
Nov 12, 2020
app pub date -
Apr 29, 2020
filing date -
May 7, 2019
priority date (Note) -
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Abstract
There is provided a successive-approximation type AD converter and a pipeline type AD converter without delay due to sample hold. A successive-approximation type AD converter 1 includes: receiving circuits configured to output the analog input signal according to the received analog input signal; subtractors configured to calculate subtraction signals between the analog input signal in each of n successive conversions and comparison signals obtained by DA-converting the control values by DA converters; comparators configured to determine a high-low relationship between the voltages of the subtraction signals and the reference voltage; a control circuit configured to update the control values so that the comparison signals approach the analog input signal based on the comparison results; and an output register configured to output the digital output signal based on the comparison results of the comparators.
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