Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Reexamination Certificate
2006-03-21
2006-03-21
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
C341S144000
Reexamination Certificate
active
07015849
ABSTRACT:
According to the present invention, there is disclosed a control circuit in which a D/A converter having an output voltage switchable based on a set value held in a register, an operation amplifier including two input terminals and one output terminal, and a switch for selectively inputting an output of the D/A converter into one of two input terminals of the operation amplifier are constituted on the same chip. The input terminal which has not been selected by the switch and the output terminal of the operation amplifier are connectable to an external circuit.
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patent: 2003/0066953 (2003-04-01), Kwon
patent: 2005/0045807 (2005-03-01), Sakaguchi
patent: 06-260851 (1994-09-01), None
patent: 11-142722 (1999-05-01), None
Frishauf Holtz Goodman & Chick P.C.
Jean-Pierre Peguy
Olympus Corporation
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