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Title: Self-calibrating multiplexer circuit

A time domain multiplexer system with automatic determination of acceptable multiplexer output limits, error determination, or correction is comprised of a time domain multiplexer, a computer, a constant current source capable of at least three distinct current levels, and two series resistances employed for calibration and testing. A two point linear calibration curve defining acceptable multiplexer voltage limits may be defined by the computer by determining the voltage output of the multiplexer to very accurately known input signals developed from predetermined current levels across the series resistances. Drift in the multiplexer may be detected by the computer when the output voltage limits, expected during normal operation, are exceeded, or the relationship defined by the calibration curve is invalidated.
Inventors:
 [1]
  1. (North Huntingdon, PA)
Issue Date:
OSTI Identifier:
870927
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
Patent Number(s):
US 5625314
Contract Number:
AC11-89PN38014
Research Org:
WESTINGHOUSE ELECTRIC CORP
Country of Publication:
United States
Language:
English
Subject:
self-calibrating; multiplexer; circuit; time; domain; automatic; determination; acceptable; output; limits; error; correction; comprised; computer; constant; current; source; capable; distinct; levels; series; resistances; employed; calibration; testing; linear; curve; defining; voltage; defined; determining; accurately; input; signals; developed; predetermined; drift; detected; expected; normal; operation; exceeded; relationship; invalidated; series resistance; calibration curve; constant current; output voltage; voltage output; input signals; normal operation; input signal; current source; time domain; source capable; current level; current levels; domain multiplexer; /327/714/