DA converter including conversion amplifier having output...

Details DA converter including conversion amplifier having output... DA converter including conversion amplifier having output...

2011-06-07

2011-06-07

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S135000, C341S136000

Reexamination Certificate

active

07956784

ABSTRACT:
A DA converter includes an IV conversion amplifier with output voltage having good linearity, to thus improve total harmonic distortion (THD) characteristics. In the DA converter, a first current path in which current flows due to differential switches being in the ON state in a differential switch section, and a second current path in which current flows due to differential switches being in the OFF state in the differential switch section are connected to the output side of the IV conversion amplifier. A first current flows in the first current path and a second current flows in the second current path. A current equal to the first current plus the second current that is of fixed current amount is drawn by an amplifier stage of the IV conversion amplifier.

REFERENCES:
patent: 6778119 (2004-08-01), May
patent: 7019676 (2006-03-01), Ikoma et al.
patent: 7205920 (2007-04-01), Morrow et al.
patent: 7535396 (2009-05-01), Melanson
patent: 2002-164788 (2002-06-01), None

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