Low power optoelectronic device and method

Details Low power optoelectronic device and method Low power optoelectronic device and method

1991-06-18

1993-10-26

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

2502084, 307491, H03K 1778, H03K 342

Patent

active

052569136

ABSTRACT:
Methods and devices are disclosed for selectively varying the load to a photodetector such as a phototransistor which forms part of a photosource/photodetector pair and for selectively using to advantage or compensating for the parasitic capacitance of the photodetector to permit reductions in power, conversion of fixed signal thresholds to software controlled digital hysteresis, automatic adjustment and compensation for unmatched photosources and associated photodetectors, and adjustment of fixed voltage thresholds.

REFERENCES:
L.A. Davidson et al, "Variable Delay in Light-Emitting Diodes", IBM Tech. Dis. Bulletin vol. 9, No. 3 Aug. 1966 p. 325.
A. Nielsen, "Matched Optical Couplers Stabilize Isolation Circuit" Electronics May 15, 1975 pp. 98-99.

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