Self-calibrating multiplexer circuit

Details Self-calibrating multiplexer circuit Self-calibrating multiplexer circuit

1995-07-11

1997-04-29

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

With particular control

Plurality of load devices

39518301, 371 28, 327 99, G01R 3130

Patent

active

056253141

ABSTRACT:
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.

REFERENCES:
patent: 4195769 (1980-04-01), Elias et al.
patent: 5001712 (1991-03-01), Splett et al.
patent: 5535216 (1996-07-01), Goldman et al.

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