Apparatus for and method of providing long integration times in

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive

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25037001, 250340, 257 21, 257 23, H01L 2714, G01J 520

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active

056295227

ABSTRACT:
Apparatus for and method of increasing the effective integration time, and, hence, reducing the noise bandwidth of a photodetector. The current output of the photodetector is converted to a voltage signal in a low pass filter. The low pass filter is preferably implemented as a switched capacitor filter.

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