Patent Number: 7,535,310

Title: Distortion compensation circuit

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 circuit 11 which 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 portion 13, 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.

Inventors: Shimizu; Yoshito (Kanagawa, JP), Saito; Noriaki (Tokyo, JP)

Assignee: Panasonic Corporation

International Classification: H03C 3/00 (20060101); H03F 1/32 (20060101); H03F 3/24 (20060101); H04B 1/04 (20060101); H04L 27/20 (20060101)

Expiration Date: 2021-05-19 0:00:00