Ralph Edward Miller

US Patent:

42765439, Jun 30, 1981

Filed:

Mar 19, 1979

Appl. No.:

6/021577

Inventors:

Ralph W. Miller - Manhattan Beach CA
James G. Peterson - Manhattan Beach CA

Assignee:

TRW Inc. - Redondo Beach CA

International Classification:

H03K 13175

US Classification:

340347AD

Abstract:

A parallel analog-to-digital converter having high speed and high resolution, fabricated on a single integrated-circuit chip in such a manner as to avoid problems typically associated with high speed parallel converters. The converter disclosed by way of example has an eight-bit output, 256 matched comparators for quantizing an analog input signal, and encoding and latching logic for deriving digital outputs from the comparators. Problems related to comparator mismatching, high comparator input capacitance and high comparator input bias current, are effectively minimized by the use of a triple diffusion fabrication process, which substantially reduces the number of defects in the circuit and provides a relatively high component packing density.