Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1992-12-10
1994-06-28
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250332, H01L 27144
Patent
active
053249445
ABSTRACT:
Individual processing cells are provided in close proximity to each detector element in an infrared detector array. Signals generated by the detectors in response to incident infrared radiation are converted to amplified voltages by their respective processing cells, with all of the cells sampling and holding their respective amplified signals simultaneously. The signals held by the various cells are then read out serially during the next cycle of alternating exposures and shadings by a rotating chopper. The amplified signals of all the cells are simultaneously reset at the beginning of each chopper cycle. The simultaneous sampling and holding allows all of the held pixel signals to represent equal periods of exposure or shading, while the local voltage conversion and signal amplification at each processing cell substantially improves the final signal-to-noise ratio.
REFERENCES:
patent: 4418335 (1983-11-01), Genahr
patent: 4740700 (1988-04-01), Shaham et al.
patent: 4808822 (1989-02-01), Manning et al.
patent: 5118946 (1992-06-01), Smith
Evans Scott
Soch Kevin L.
Denson-Low W. K.
Hannaher Constantine
Hughes Aircraft Company
Schubert W. C.
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