发明申请
- 专利标题： Distortion compensation circuit, power amplifier using distortion compensation circuit, and distortion compensation signal generating method
- 专利标题（中）： 失真补偿电路，使用失真补偿电路的功率放大器和失真补偿信号生成方法
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申请号： US11063998申请日： 2005-02-24
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公开(公告)号： US20050184803A1公开(公告)日： 2005-08-25
- 发明人: Nobuo Hirose , Nobuo Murata , Yasutoshi Tada , Nobuo Tsukamoto
- 申请人： Nobuo Hirose , Nobuo Murata , Yasutoshi Tada , Nobuo Tsukamoto
- 优先权： JP2004-049442 20040225
- 主分类号： H03F1/26
- IPC分类号： H03F1/26 ; H03F1/32 ; H03F3/24 ; H04B1/04 ; H04J11/00
摘要：
A distortion compensating circuit for a power amplifier attains raised compensating accuracy with shorter convergence time by accurately and quickly generating a distortion compensation signal for predistortion. An error signal representing the difference between the input and output signals of the power amplifier is generated. From the error signal and the input signal, the coefficients of the third-order intermodulation distortion, fifth-order intermodulation distortion and seventh-order intermodulation distortion are calculated. According to these coefficients, a distortion compensating signal which is characteristically opposite in phase and gain to the intermodulation distortions is generated.
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