Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2008-07-31
2010-06-29
Jeanglaude, Jean B (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S144000
Reexamination Certificate
active
07746261
ABSTRACT:
A variable gain amplifier for amplifying an input voltage at a gain defined by a binary code includes: a signal input terminal; a signal output terminal; a charge division means that accumulates a charge, divides an accumulated charge, and accumulates a divided charge; a charge cumulation means that accumulates a charge, adds or subtracts an accumulated charge with or from the divided charge in the charge division means, and accumulates a resultant charge; and a controller that initially executes to accumulate the charge corresponding to the input voltage in the charge division means, executes to accumulate the charge corresponding to the input voltage or a predetermined voltage in the charge cumulation means, executes a charge dividing operation according to each bit of the binary code sequentially from a most significant bit, and executes a charge adding or subtracting operation according to an data value in each bit.
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Notice of Reason for Refusal issued from the Japanese Patent Office mailed on Aug. 18, 2009 in the corresponding Japanese patent application No. 2008-094909 (and English translation).
DENSO CORPORATION
Jeanglaude Jean B
Posz Law Group , PLC
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