Input circuit for infrared detector

Details Input circuit for infrared detector Input circuit for infrared detector

1985-04-09

1986-12-30

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250370, 323312, H01L 2714

Patent

active

046330860

ABSTRACT:
A method and circuit are provided for interfacing an infrared detector to a common power supply and signal processing circuitry. A multichannel input circuit including a plurality of buffer circuits and a common bias network is formed on a single semiconductor substrate. The common bias network reduces the necessary connections between the substrate and the external power supply. The bias network is operative to reduce power level variations in the signal from the external power supply. Each channel includes a negative feedback circuit to maintain a dedicated detector in a zero bias condition, thus reducing 1/f noise and enhancing the signal-to-noise ratio of the circuit. The load to each channel is adjustable to maintain the detector in the zero bias condition.

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Infrared Detectors, "Detectivity and Preamplifier Considerations for Indium Antimonide Photovoltaic Detectors", G. R. Pruett and R. L. Petritz, Hallsted Press (1959), pp. 1524-1529.
Electronics, 2/3/77, pp. 96-100.

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