RF power amplifier system having improved distortion reduction

Details RF power amplifier system having improved distortion reduction RF power amplifier system having improved distortion reduction

1991-03-25

1992-07-21

Mottola, Steven

Amplifiers

Modulator-demodulator-type amplifier

330149, 455126, H03F 338, H03F 126

Patent

active

051326370

ABSTRACT:
An RF power amplifier system is provided having improved distortion reduction. This system includes a plurality of actuatable RF power amplifiers, each connected to a DC voltage source and each having an input circuit for when actuated receiving and amplifying an RF drive signal and each having an output circuit for providing an amplified RF output signal. One or more of these RF power amplifiers are actuated, turned on, in dependence upon the magnitude of an input audio frequency signal. The RF output signals are additively combined to provide a combined RF output signal. RF output signal detector means are connected to the output circuit of at least one of the RF power amplifiers for providing a correction signal having a value which varies as a function of the value of the RF voltage detected at the output circuit. The correction signal is combined with the input signal prior to actuation of one or more of the RF power amplifiers.

REFERENCES:
patent: 4571551 (1986-02-01), Trager
patent: 4745368 (1988-05-01), Lodahl

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