System and method of RF power amplification

Details System and method of RF power amplification System and method of RF power amplification

2005-01-04

2005-01-04

Nguyen, Lee (Department: 2682)

Telecommunications

Transmitter

Power control, power supply, or bias voltage supply

C455S127200, C455S115200, C455S108000, C455S116000, C455S093000

Reexamination Certificate

active

06839549

ABSTRACT:
A radio frequency power amplifier circuit provides linear amplitude modulation of a radio frequency output signal while operating in a saturated amplification mode. The power amplifier circuit incorporates a lossy modulator that functions as a variable resistance responsive to an amplitude modulation signal. A supply voltage is coupled to the voltage supply input of the power amplifier circuit through the lossy modulator, such that the supply voltage applied to the power amplifier varies with the amplitude modulation signal. The radio frequency power amplifier circuit modulates the envelope of an RF output signal generated by saturated mode amplification of a constant envelope radio frequency input signal.

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