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Circuit arrangement for correction of a sensor output

  • US 4,499,423 A
  • Filed: 12/08/1981
  • Issued: 02/12/1985
  • Est. Priority Date: 12/18/1980
  • Status: Expired due to Fees
First Claim
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1. A circuit arrangement for correcting the output of a sensor which experiences time dependent error changes in sensitivity, according to a sensitivity curve, as a function of at least one influence factor comprising:

  • correction circuit means which simulates the sensitivity curve as a function of time and the at least one influence factor, connected to the sensor for receiving the sensor output and for producing from the sensor output a corrected output signal of constant sensitivity, said correction circuit means comprising a differential amplifier having two inputs and an output, one of said inputs being provided with a value corresponding to a sensitivity of the sensor when it is not experiencing a load, the other input provided for receiving a quantity proportional to the sensor output as it is changed according to the sensitivity curve.

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