Protective circuit for power amplifier

Details Protective circuit for power amplifier Protective circuit for power amplifier

H - Electricity

02

H

330/1

H02H 7/20 (2006.01) H03F 1/52 (2006.01) H03F 3/343 (2006.01) H03F 3/68 (2006.01)

Patent

CA 1178345

ABSTRACT OF THE DISCLOSURE A protective circuit for a power amplifier includes an input terminal connected to the output terminal of a power amplifier to be protected and supplied with an output signal to a load from the power amplifier, a high frequency signal detector connected to the input terminal for detecting a higher frequency signal than that of audio frequency range and for producing a first control signal when the output of the high frequency signal exceeds a predetermined value, a control and driving circuit supplied with the first control signal, and a protective circuit controlled by the output of the control and driving circuit so as to disconnect the connection between the output terminal of the power amplifier and the load.

408596

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