Array uniformity correction

  • US 4,752,694 A
  • Filed: 01/12/1987
  • Issued: 06/21/1988
  • Est. Priority Date: 01/12/1987
  • Status: Expired due to Term
First Claim
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1. A circuit for providing array uniformity correction, comprising in combination:

  • a plurality of resistance type radiation sensor means connected in an array, each of said sensor means having an inherent electrical resistance associated therewith, the ohm magnitude of which may differ from sensor to sensor;

    switching means for sequentially connecting said sensor means, one at a time, to an electrical source and to a readout circuit for interrogation of said sensor means, said switching means including controllable resistance means in series with the sensor means;

    digital memory means storing a separate number for each of said sensor means, which numbers are a function of the inherent resistance value, respectively, of each sensor means;

    said memory means also providing an output of the number representing the sensor means under interrogation; and

    ,digital-to-analog converting means connected for converting the number output of said memory means to an analog voltage and applying the analog voltage in controlling biasing relation to the controllable resistance means.

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