Predistorter for power amplifier

Details Predistorter for power amplifier Predistorter for power amplifier

2005-07-20

2008-08-05

Pascal, Robert J. (Department: 2817)

Amplifiers

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

Reexamination Certificate

active

07408408

ABSTRACT:
A predistorter that linearizes the nonlinearity of a power amplifier in a system supporting a multimode and a multiband (frequency band). The predistorter includes a field-effect transistor, an impedance transform unit, a first inductor, a first capacitor, and a second capacitor. The field-effect transistor has a source connected to the ground and uses a variable gate bias voltage. The impedance transform unit is connected to a drain of the field-effect transistor to perform impedance transform. The first inductor is connected between the impedance transform unit and a voltage provided to the field-effect transistor. The first capacitor is connected between a power input terminal and the impedance transform unit. The second capacitor is connected between a power output terminal and the impedance transform unit.

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