Linearizing LINC amplifiers using pre-distortion

Details Linearizing LINC amplifiers using pre-distortion Linearizing LINC amplifiers using pre-distortion

2005-08-16

2005-08-16

Mottola, Steven J. (Department: 2817)

Amplifiers

With plural amplifier channels

Redundant amplifier circuits

C330S149000

Reexamination Certificate

active

06930547

ABSTRACT:
An input signal having amplitude information is pre-distorted and converted into two pre-distorted signals without amplitude information. The two pre-distorted signals are separately amplified and then recombined to generate a linearized amplified output signal having amplitude information. The pre-distortion and conversion may be implemented using a pre-distorter and a LINC modulator. Alternatively, the pre-distortion and conversion may be implemented in circuitry that combines the functions of a pre-distorter and a LINC modulator. The amplified, pre-distorted signals are preferably combined using circuitry that provides at least some impedance matching, such as a transformer or a transmission line tee with transmission line stubs.

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