US PATENT SUBCLASS 374 / 172
.~.~ With compensation for sensor nonlinearity or lead impedance

Current as of: June, 1999
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374 /   HD   THERMAL MEASURING AND TESTING

100  DF  TEMPERATURE MEASUREMENT (E.G., THERMOMETER) {13}
163  DF  .~ By electrical or magnetic heat sensor {13}
172.~.~ With compensation for sensor nonlinearity or lead impedance {1}
173  DF  .~.~.~> By feedback in amplifier circuit or with constant current source in circuit

DEFINITION

Classification: 374/172

With compensation for sensor nonlinearity or lead impedance:

(under subclass 136) Subject matter having circuitry to modify the signal representing the sensed temperature to form a signal which is linearly related to the sensed temperature, or which is independent of the impedance of leads connecting the sensor to the other circuit elements.

(1) Note. The signal modification for linearizing is generally the function inverse to the sensor temperature response.

(2) Note. The signal modification for impedance compensation may include three or more leads to a two terminal sensor, or separable (e.g. by polarity) signals energizing the sensor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

171, for such linearization by digital processing circuitry.