Modulated voltage supply and fault monitoring thereof adapted fo

Details Modulated voltage supply and fault monitoring thereof adapted fo Modulated voltage supply and fault monitoring thereof adapted fo

1991-06-27

1992-05-05

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

330 10, 330298, 330207P, 330200, 455108, H03F 126, H03F 324

Patent

active

051111586

ABSTRACT:
An RF power amplifier system is disclosed having a modulated voltage supply and fault monitoring thereof. The modulated DC voltage supply receives an input voltage as well as a modulating signal, such as an audio signal, to provide a modulated voltage which has been amplitude modulated in accordance with the amplitude variations of the modulating signal. Circuitry is provided for providing a variable reference signal which has a magnitude that varies with that of the modulating signal. A fault comparator compares the modulated signal with the variable reference signal and provides a fault signal dependent upon the comparison.

REFERENCES:
patent: 4199723 (1980-04-01), Cummings et al.
patent: 4218660 (1980-08-01), Carver
patent: 4240036 (1980-12-01), Kohler
patent: 4442407 (1984-04-01), Apel
patent: 4510456 (1985-04-01), Swanson

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