Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Reexamination Certificate
2009-06-16
2010-12-28
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
C341S155000
Reexamination Certificate
active
07859446
ABSTRACT:
An exemplary object of the present invention is to achieve both of high-speed operation by parallel processing and a simple configuration by sequential comparison processing, so as to realize high accuracy of AD conversion processing. An AD converter according to the present invention includes a parallel-type AD converting unit that generates an upper bit digital signal composed of a plurality of bits by parallel processing based on an input analog signal input from a predetermined input circuit, a sequential comparison type AD converting unit that generates a digital signal by sequential comparison processing based on a converted analog signal that is generated by converting the upper bit digital signal into an analog signal, and a reconversion controller that detects an indefinite bit included in the upper bit digital signal and reconverts the indefinite bit by the sequential comparison type AD converting unit.
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Foley & Lardner LLP
Jean-Pierre Peguy
Renesas Electronics Corporation
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