Circuit for the control of a triac without galvanic isolation

Details Circuit for the control of a triac without galvanic isolation Circuit for the control of a triac without galvanic isolation

2007-05-29

2007-05-29

Deberadinis, Robert L. (Department: 2836)

Electrical transmission or interconnection systems

Switching systems

Switch actuation

C327S432000

Reexamination Certificate

active

10744333

ABSTRACT:
A circuit for controlling a bidirectional switch referenced to a first reference voltage by a control circuit supplied by a first voltage and referenced to a second reference voltage. The supply voltage of the control circuit is connected by a diode to a coupling circuit comprising a node, this node being connected to the collector of an NPN transistor having its emitter connected to the second reference voltage and having its base receiving the output of the control circuit, to a first terminal of a capacitor having its second terminal connected to the first reference voltage, to the emitter of a PNP transistor having its base connected to the collector of the transistor, and having its collector connected to the control terminal of the bidirectional switch.

REFERENCES:
patent: 3526809 (1970-09-01), Obenhaus
patent: 3547348 (1970-12-01), Kruper
patent: 3798462 (1974-03-01), Rizzo
patent: 3848140 (1974-11-01), Guermeur et al.
patent: 4336464 (1982-06-01), Weber
patent: 31 48 115 (1982-09-01), None
French Search Report from French Patent Application 02/16802, filed Dec. 27, 2002.

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