Quiescent signal compensated photodetector system for large dyna

Details Quiescent signal compensated photodetector system for large dyna Quiescent signal compensated photodetector system for large dyna

1990-11-05

1991-10-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

307311, H01J 4014

Patent

active

050576828

ABSTRACT:
The linearity and dynamic range of a photodetector system is enhanced by providing real time cancellation of condition-dependent quiescent output signals from the photosensitive devices by provision of a condition-dependent output signal monitoring device which drives the input section of a current mirror having output sections connected to the active photosensitive devices to zero out the condition-dependent quiescent output signals of those photosensitive devices during system operation. Multiple output sections may be run from a single input section of the current mirror.

REFERENCES:
patent: 3877039 (1975-04-01), Ichinohe et al.
patent: 4437743 (1984-03-01), Sakai et al.
patent: 4659930 (1987-04-01), Johnson et al.
patent: 4781195 (1988-11-01), Martin
patent: 4806748 (1989-02-01), Takami et al.
patent: 4857725 (1989-08-01), Goodnough et al.

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