Protective circuit for pulse width modulated signal amplifier

Details Protective circuit for pulse width modulated signal amplifier Protective circuit for pulse width modulated signal amplifier

1975-03-25

1976-08-24

Mullins, James B.

Amplifiers

Miscellaneous

Amplifier protection means

330 10, 330207A, H03F 3387

Patent

active

039769550

ABSTRACT:
A protective circuit for a pulse width modulated signal amplifier includes a signal input circuit, a carrier signal generator, a pulse width modulator for receiving both the output signals of the signal input circuit and the carrier signal generator and for producing a pulse width modulated signal, an amplifier for receiving the pulse width modulated signal and for amplifying it to drive a load through a low pass filter, a detecting circuit for detecting whether the pulse width modulated signal is present or not, or detecting DC voltage of undesirable duration produced at the output of the amplifier and for producing a control signal, and a protective circuit activated by the control signal for cutting off the operation of the amplifier.

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