Resistance ladder, D-A converter, and A-D converter

Details Resistance ladder, D-A converter, and A-D converter Resistance ladder, D-A converter, and A-D converter

1995-06-14

1997-04-01

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341148, H03M 178

Patent

active

056170912

ABSTRACT:
A resistance ladder which divides a potential difference between two power sources into 2.sup.m levels by a resistance group in the center portion, then adjusting the number of resistors which are disposed at the both end portions of the resistance ladder and interposed between the resistors of the center portion and the two power sources so that the division voltages of 2.sup.m levels are changed in (n-m) levels, with the result that the potential difference is divided into 2.sup.n levels. A D-A converter uses the resistance ladder. An A-D converter with the D-A converter which generates a reference voltage to be compared with an input voltage.

REFERENCES:
patent: 879646 (1908-02-01), Jones
patent: 968329 (1910-08-01), Dawson
patent: 4198622 (1980-04-01), Connolly, Jr. et al.
patent: 4647903 (1987-03-01), Ryu
patent: 4742329 (1988-05-01), Yamada et al.
patent: 5126740 (1992-06-01), Kawada
patent: 5495245 (1996-02-01), Ashe

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