Input current saving apparatus for flash A/D converter

Details Input current saving apparatus for flash A/D converter Input current saving apparatus for flash A/D converter

1985-06-28

1986-07-22

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

H03M 0000

Patent

active

046022414

ABSTRACT:
A flash analog-to-digital (A/D) converter includes a plurality of comparators, each of which is arranged to be alternately coupled with the input signal and the respective one of a plurality of reference voltages in order to find the closest match therebetween. The output of the comparators is fed to a programmable logic array (PLA) for determining a binary number related to the particular value of the input signal. Pursuant to this invention, the input signal is continuously tracked, and in dependence upon whether the input signal is above or below the midpoint reference potential, a predetermined potential, instead of the input signal, is applied to particular groups of comparators.

REFERENCES:
patent: 4400693 (1983-08-01), Flamm
patent: 4417233 (1983-11-01), Inoue
patent: 4507649 (1985-03-01), Dingwall
RCA Linear IC, CA 3300, CMOS Video Speed 6-Bit, Flash Analog-to-Digital Converter.

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