Fail-safe opto-electronic phase inverting circuits

Details Fail-safe opto-electronic phase inverting circuits Fail-safe opto-electronic phase inverting circuits

1974-01-23

1976-08-17

Stolwein, Walter

Radiant energy

Photocells; circuits and apparatus

Signal isolator

250209, 207311, 321 51, 328155, H01J 3912, G02B 2700

Patent

active

039756432

ABSTRACT:
This disclosure relates to a vital type of an optoelectronic phase inverting circuit arrangement employing a plurality of cascaded photon coupled isolators. Each of the photon coupled isolators includes a light emitting diode and an associated light responsive transistor. A source of periodic input signals is coupled to the photon coupled isolators so that electrical energy is converted to light energy by the light emitting diodes to control the conductive conditions of the respective light responsive transistors whereby the periodic input signals are inverted 180.degree. barring the presence of a critical component or circuit failure.

REFERENCES:
patent: 3167657 (1965-01-01), Vize
patent: 3524986 (1970-08-01), Harnden, Jr.
patent: 3584286 (1971-06-01), Randall
patent: 3671749 (1972-06-01), Harnden, Jr.
patent: 3696250 (1972-10-01), Weimer
patent: 3696389 (1972-10-01), Fenner
patent: 3717770 (1973-02-01), Dyck et al.
patent: 3723769 (1973-03-01), Collins
patent: 3812364 (1974-05-01), Rougeot

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