Accession Number : ADD013198

Title :   Coarse/Fine Digital Pattern Combiner for High Accuracy.

Descriptive Note : Patent, Filed 10 Sep 81, patented 22 Mar 83,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Freeman, Elzie H

Report Date : 22 Mar 1983

Pagination or Media Count : 6

Abstract : A rotary shaft position measurement system using digital position detectors providing coarse and fine binary word readouts having four overlapping bits all of which are having subtractively compared to provide command signals that are used to correct the non-overlapping portion of the coarse word prior to combining with the fine word. The comparator utilizes a binary four bit full adder in combination with coarse word input inversion, and direct and inverted application of the carryout and sigma outputs to first and second AND gates to generate coarse word correction commands.

Descriptors :   *PATENTS, *ANALOG TO DIGITAL CONVERTERS, *CODING, *DIGITAL COMBINERS, *TRANSDUCERS, ANGULAR MOTION, DRIVE SHAFTS, COMPARATORS, DATA RATE, HIGH RESOLUTION, LOGIC CIRCUITS, SCHEMATIC DIAGRAMS, BINARY PROCESSORS, SPECIFICATIONS, NAND GATES

Subject Categories : Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE