Analog-to-digital converter and analog-to-digital conversion method
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United States of America Patent
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Aug 25, 2015
Grant Date -
May 21, 2015
app pub date -
Nov 20, 2014
filing date -
Nov 21, 2013
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Abstract
According to an embodiment, an analog-to-digital converter includes a first AD (analog-to-digital) conversion circuit and a second AD conversion circuit. The first AD conversion circuit performs AD conversion of a first input signal to generate an upper-bit digital signal. The second AD conversion circuit performs AD conversion of a sampled signal to generate a lower-bit digital signal. The sampled signal is obtained by sampling a residual signal corresponding to a residue of the AD conversion in the first AD conversion circuit. A period during which the second AD conversion circuit performs AD conversion of the sampled signal overlaps a period during which a second input signal subsequent to the first input signal is settled.
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