Device for receiver for optical signals

Details Device for receiver for optical signals Device for receiver for optical signals

1975-02-11

1976-12-21

La Roche, Eugene

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214AG, 250214B, 330103, 330110, 356224, G01J 144, H01J 3912

Patent

active

039990605

ABSTRACT:
A device is provided for controlling the sensitivity of a receiver of the type comprising a photosensitive element operative to convert radiant energy into electric signals and having an amplifier connected to the output of the photosensitive element and signal processing members for separating a useful signal from interfering background radiation. A sensor device is connected to the photosensitive element to sense the direct current which the element emits in response to radiation from the sun or other strong sources of disturbance, the sensor device being operative to emit a signal when the direct current exceeds a predetermined value, and a switching device responsive to said signal operates to switch the amplifier from a given fixed sensitivity level to a lower fixed level of sensitivity. The arrangement may comprise an amplifier having a feedback circuit, with the switching device taking the form of a diode which is selectively driven into conduction by said signal and which operates in its conducting state to connect a shunt resistor across the amplifier feedback circuit.

REFERENCES:
patent: 3053985 (1962-09-01), Grammer et al.
patent: 3092729 (1963-06-01), Cray
patent: 3209266 (1965-09-01), White
patent: 3604941 (1971-09-01), Crum
patent: 3701036 (1972-10-01), Stefenel

Affiliated with

Also associated with

Rating

Device for receiver for optical signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for receiver for optical signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for receiver for optical signals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1840621