Signal transmission circuit having a latch-up function

Details Signal transmission circuit having a latch-up function Signal transmission circuit having a latch-up function

1992-09-17

1993-10-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Signal isolator

307311, 250214LS, G02B 2700

Patent

active

052568822

ABSTRACT:
A signal transmission circuit having a latch-up function has a first and a second photo-couplers, each of which has a photo-diode (light emitting diode) and a photo-transistor. The photo-diode in the first photo-coupler is series-connected with the photo-transistor in the second photo-coupler between high and low voltage supplies. The other photo-diode and photo-transistor in said first and second photo-couplers are connected in the same way. As a result, signals are transmitted between those two photo-couplers with a high noise resistance.

REFERENCES:
patent: 4521681 (1985-06-01), Inaba et al.
patent: 4972089 (1990-11-01), Stevenson
patent: 5189307 (1993-02-01), Fabian

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