D/A converter

Details D/A converter D/A converter

2006-07-18

2006-07-18

Jeanglaude, Jean Bruner (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S118000, C341S120000, C341S144000

Reexamination Certificate

active

07079066

ABSTRACT:
A D/A converter. The D/A converter comprises a R-2R ladder network and a correction circuit. The R-2R ladder network receives first and second reference voltage terminals and generates an analog voltage at an output terminal in response to a digital input code. The correction circuit, coupled between the first and second reference voltage terminals via a first switch and a second switch respectively, comprises a plurality of R resistors wherein a terminal of one of the R resistors thereof is coupled to the output terminal via a third switch, and the first, second and third switches are turned on in response to the input digital code.

REFERENCES:
patent: 3974498 (1976-08-01), Knier
patent: 4638303 (1987-01-01), Masuda et al.
patent: 5703588 (1997-12-01), Rivoir et al.
patent: 6137430 (2000-10-01), Lyden et al.
patent: 6337646 (2002-01-01), Hatani et al.
patent: 6583744 (2003-06-01), Bright
patent: 6707404 (2004-03-01), Yilmaz

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