A/D converter utilizing a first reference voltage divider and le

Details A/D converter utilizing a first reference voltage divider and le A/D converter utilizing a first reference voltage divider and le

1992-04-13

1993-11-23

Logan, Sharon D.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341159, 341156, H03M 134, H03M 136

Patent

active

052648516

ABSTRACT:
An A/D converter having a first divided reference voltage output circuit for dividing a first reference voltage by m and outputting a plurality of first divided reference voltages; a second divided reference voltage output circuit for dividing a second reference voltage by n and outputting a plurality of second divided reference voltages; a level shift circuit for level-shifting the plurality of second divided reference voltages in accordance with an input voltage to be A/D converted, and outputting a plurality of third divided reference voltages; a comparator circuit for comparing each of the plurality of first divided reference voltages with each of the plurality of third divided reference voltages, and outputting a combination of one of the first divided reference voltage and one of the third divided reference voltages having a smallest voltage difference therebetween; and an encoder circuit for outputting a digital signal converted from the input signal, in accordance with the combination outputted from the comparator circuit.

REFERENCES:
patent: 4912469 (1990-03-01), Van De Grift et al.
patent: 4983973 (1991-01-01), Lewyn
patent: 5019821 (1991-05-01), Sugimoto

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