Analog-digital converter with gain adjustment for high-speed...

Details Analog-digital converter with gain adjustment for high-speed... Analog-digital converter with gain adjustment for high-speed...

2007-10-30

2007-10-30

Williams, Howard L. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S162000

Reexamination Certificate

active

11049081

ABSTRACT:
An input analog signal is fed to an amplifier circuit and an AD converter circuit. The AD converter circuit converts the input analog signal into a digital value of a predetermined number of bits, and outputs the digital value to an encoder (not shown) A DA converter circuit converts the digital value of a predetermined number of bits output from the AD converter circuit into an analog signal. The amplifier circuit samples and amplifies the input analog signal by a factor of α (greater than 1). A subtracter circuit subtracts an output of the DA converter circuit amplified by a factor of α from an output of the amplifier circuit.

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Stata, User's Guid to Applying and Meauring Operation Amplifier Specifications, Sep. 1967, Analog Devices Inc., Analog Dialogue vol. 1, No. 3, pp. 9-16.
Japanese Office Action, with English Translation, issued on corresponding Japanese Patent Application No. JP 2004-071393, dated on Jul. 18, 2007.
Japanese Office Action, with English Translation, issued in corresponding Japanese Patent Application No. JP 20074-029879, dated on Jul. 31, 2007.

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