Photoelectric switch using pulse width discrimination

Details Photoelectric switch using pulse width discrimination Photoelectric switch using pulse width discrimination

1990-05-04

1991-12-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502221, G01V 904

Patent

active

050755420

ABSTRACT:
A photoelectric switch with a pulse width discrimination circuit ensuring that an object may be surely detected even when there are a plurality of adjacent photoelectric switches, and with an amplifier having a saturation characteristic preventing function ensuring that the pulse width is not changed when the input to the amplifier is large.

REFERENCES:
patent: 4733081 (1988-03-01), Mizukami
patent: 4929825 (1990-05-01), Maeyama
patent: 4942385 (1990-07-01), Kobayashi et al.

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