Analog-digital conversion circuit

Details Analog-digital conversion circuit Analog-digital conversion circuit

2005-02-22

2005-02-22

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S156000, C341S126000

Reexamination Certificate

active

06859158

ABSTRACT:
An operational amplifier, a sub A/D converter, a D/A converter, and an operation amplifier in a first stage circuit operate in response to a clock signal. An operation amplifier, a sub A/D converter, a D/A converter, and an operation amplifier in a second stage circuit operate in response to a clock signal having a frequency three times as high as that of the first clock signal. An analog signal output from the operational amplifier in the first stage is applied to an input node in the second stage circuit through a switch. An analog signal output from an operational amplifier in the second stage circuit is applied to an input node in the second stage circuit through a switch.

REFERENCES:
patent: 5159342 (1992-10-01), Yotsuyanagi
patent: 5821893 (1998-10-01), Kumamoto et al.
patent: 6097326 (2000-08-01), Opris et al.
patent: 6304206 (2001-10-01), Wada et al.
patent: 20030006926 (2003-01-01), Nakai et al.
patent: 11-88172 (1999-03-01), None

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