Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2008-10-23
2010-10-12
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S156000
Reexamination Certificate
active
07812752
ABSTRACT:
A digital-to-analog converter circuit includes: a first subdecoder for receiving a first reference voltage group and selecting a reference voltage Vrk based upon an input digital signal; a second subdecoder for receiving a second reference voltage group and selecting a reference voltage Vr(k+1) based upon the input digital signal; a third subdecoder for receiving a third reference voltage group and selecting a reference voltage Vr(k+2) based upon the input digital signal; a fourth subdecoder for receiving the reference voltages that have been selected by respective ones of the first to third subdecoders, selecting two of these reference voltages (inclusive of selecting the same voltage redundantly) based upon an input digital signal, and outputting the selected two reference voltages; and an amplifier circuit for receiving the two reference voltages that have been selected by the fourth subdecoder and outputting a result of an operation applied to the two reference voltages.
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Japanese Office Action dated Jul. 17, 2009, with partial English translation.
Okuzono Noboru
Tsuchi Hiroshi
Jean-Pierre Peguy
McGinn IP Law Group PLLC
NEC Electronics Corporation
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