Light receiving circuit having fast response time and a stable o

Details Light receiving circuit having fast response time and a stable o Light receiving circuit having fast response time and a stable o

1978-08-14

1980-11-11

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250209, H01J 4014

Patent

active

042335051

ABSTRACT:
The present invention is a light receiving circuit which includes an active device and light responsive switching device. The active device has an emitter, a base and a collector, the base being responsive to a first constant voltage source and the collector being responsive to a second voltage source. The light responsive switching device has a first lead and a second lead, the first lead being connected electrical ground and the second lead being connected to the emitter of the active device. The light receiving circuit of the present invention exhibits a high response speed and a stable output waveform. In another embodiment, the light receiving circuit of the present invention includes two active devices and two light responsive switching devices.

REFERENCES:
patent: 3424908 (1969-01-01), Sitter
patent: 3450888 (1969-06-01), Spangler
patent: 3535529 (1970-10-01), Davidson
patent: 3786264 (1974-01-01), Ferro et al.
patent: 3814944 (1974-06-01), Berger
patent: 3881118 (1975-04-01), Forrest et al.

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