Pyroelectric sensor with high sensitivity

Details Pyroelectric sensor with high sensitivity Pyroelectric sensor with high sensitivity

1988-02-16

1989-09-19

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250349, G01J 524

Patent

active

048683906

ABSTRACT:
A pyroelectric sensor circuit arrangement for reducing noise and increasing sensitivity has a main current amplifier with a high feedback resistor connected to receive input from an electrode of a pyroelectric element, and includes a compensation amplifier in a unity gain amplifier configuration connected to a common power source with the main amplifier. The compensation amplifier is connected to discharge transients from the pyroelectric element when electrode voltage exceeds the positive voltage or goes below the negative voltage of the power source. A pair of anti-parallel diode or similar component is connected between the main amplifier input and the compensation amplifier output.

REFERENCES:
patent: 4198564 (1980-04-01), Baker et al.
Altmann et al., "Fast Current Ampl. for Bkg-Limited Operat. . . . ", J. Phys. E. Sci. Instr., vol. 13, No. 12, (Dec. 1980), pp. 1275-1277.

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