Apparatus and method for linear power amplification

Details Apparatus and method for linear power amplification Apparatus and method for linear power amplification

1998-09-16

2000-05-30

Mottola, Steven J.

Amplifiers

Hum or noise or distortion bucking introduced into signal...

330136, H03F 126, H03G 320

Patent

active

060695307

ABSTRACT:
The method includes receiving a radio frequency (RF) input signal having an amplitude and a phase, adjusting the amplitude and the phase of the RF input signal to produce an adjusted RF input signal, amplifying the RF input signal to produce an RF output signal, and combining the adjusted RF input signal and the RF output signal to produce an error signal. Next, a power level of the error signal is detected, and based on the power level, automatically adjusting a gain and a phase of the RF output signal and automatically adjusting a bias of the amplifier.

REFERENCES:
patent: 5138274 (1992-08-01), Nakanishi et al.
patent: 5182524 (1993-01-01), Hopkins
patent: 5963090 (1999-10-01), Fukuchi
Microwaves & RF, "LDMOS Transistor Powers PCS Base-Station Amplifier", Mar. 1998, vol. 37, No. 3, pp. 69-80.

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