Protection circuit

Details Protection circuit Protection circuit

1975-05-01

1976-09-14

Moose, Harry

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

317 33R, 317 33SC, 317 50, 330207P, H02H 720

Patent

active

039809307

ABSTRACT:
It is known in the art to place a low impedance path across the input circuit of an output amplifier when the power dissipation of the amplifier exceeds a given value. The present circuit includes, in addition, a gate controlled rectifier, the main conduction path of which is connected across the output terminals of the amplifier, and which is turned on in response to a flow of current through this low impedance path. This additional circuit protects the amplifier from voltage spikes produced, for example, by an inductive load, such as a speaker driven by the amplifier.

REFERENCES:
patent: 3359434 (1967-12-01), Galluzzi
patent: 3536958 (1970-10-01), Sondermeyer
patent: 3544720 (1970-12-01), Corderman
patent: 3555358 (1971-01-01), Gibbs
patent: 3597655 (1971-08-01), Forte
patent: 3668545 (1972-06-01), Von Recklinghausen
patent: 3819986 (1974-06-01), Fukuoka

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