Distortion compensating circuit

Details Distortion compensating circuit Distortion compensating circuit

2011-03-29

2011-03-29

Mis, David (Department: 2817)

Modulators

Phase shift keying modulator or quadrature amplitude modulator

C375S308000

Reexamination Certificate

active

07915969

ABSTRACT:
A distortion compensating circuit is provided in which, in the polar modulation system, while suppressing increase of compensation data and increase of the circuit scale, a modulated signal can be correctly expressed, or low-distortion characteristics of a power amplifier can be realized. Based on a steady characteristic compensating circuit11which stores an output signal amplitude and output phase characteristics with respect to a control voltage in a steady state, amplitude adjustment is executed on amplitude information r11(t) on which amplitude correction is performed, by a first amplitude information adjusting portion13, whereby the output-response characteristics of an output signal amplitude of an amplifier with respect to a change of the control voltage can be improved.

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