Integrated photodetector with moving destination circuit

Details Integrated photodetector with moving destination circuit Integrated photodetector with moving destination circuit

1993-04-06

1995-01-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

330308, H01J 4014

Patent

active

053827864

ABSTRACT:
A photodetector circuit provides a highly accurate digital signal output in response to incoming optical pulses from an LED having an inherent optical output fall time. The LED is optically coupled to a photodiode which produces an input current in response to the optical output. The input current is amplified by an amplifier having two stages to produce an output voltage signal for switching an output transistor. An RC circuit is coupled between the first and second stage amplifiers for introducing a transient into the output voltage signal for reducing propagation delay and increasing the noise margin of the circuit.

REFERENCES:
patent: 4567446 (1986-01-01), Konishi
patent: 4861978 (1989-08-01), Anderson
patent: 5061859 (1991-10-01), Lovelace et al.
patent: 5216386 (1993-06-01), Wyatt

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