RF power amplifier

Details RF power amplifier RF power amplifier

1992-05-28

1993-10-12

Mullins, James B.

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

330134, 330279, H03G 330

Patent

active

052529290

ABSTRACT:
An RF power amplifier includes an RF power amplifying section having a variable amplification gain. A phase shifter connected to the RF power amplifying section serves to shift a phase of an output signal of the RF power amplifying section. The phase shifter has an input terminal subjected to the output signal of the RF power amplifying section and an output terminal subjected to a signal which results from shifting the phase of the output signal of the RF power amplifying section. A control-signal generating section serves to generate a control signal on the basis of the signals at the input terminal and the output terminal of the phase shifter. The control signal depends on a power of the output signal of the RF power amplifying section. The amplification gain of the RF power amplifying section is controlled in response to the control signal.

REFERENCES:
patent: 3449680 (1969-06-01), Schilb et al.
patent: 4165493 (1979-08-01), Harrington

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