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Pyroelectric detector circuits and devices

  • US 4,198,564 A
  • Filed: 04/12/1978
  • Issued: 04/15/1980
  • Est. Priority Date: 04/19/1977
  • Status: Expired due to Term
First Claim
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1. A circuit arrangement comprising a radiation detector element of pyroelectric material, field effect transistor amplifier means connected to the detector element to receive an input signal therefrom, said field effect transistor having a gate electrode, at least one ultra-low leakage non-linear device connected in a part of the circuit including the gate electrode of the field effect transistor amplifier means and the detector element, said non-linear device serving to limit the excursion in one direction of the input signal to the field effect transistor amplifier means and thereby inhibit saturation under conditions of large transients in radiation input or under conditions of progressive changes in radiation input of low magnitude.

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