发明名称 |
Distortion compensating device and power amplifying device with distortion compensating function |
摘要 |
One divided signal divided into two by a dividing circuit is inputted to a gate of a source grounded FET through a first matching circuit. In a drain of the FET, a second harmonic having a phase and an amplitude in accordance with an impedance of the first matching circuit is generated and extracted in a band pass filter and then the amplitude is adjusted in an attenuation circuit to input to an addition circuit through a second matching circuit. In the addition circuit, the output of the second matching circuit is added to another divided signal of the dividing circuit and inputted to a power amplifier. The impedance in the first matching circuit affecting the phase of the second harmonic generated from the FET is set so that a distortion component generated in the power amplifier is compensated for by the second harmonic inputted in the addition circuit.
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申请公布号 |
EP1562286(A2) |
申请公布日期 |
2005.08.10 |
申请号 |
EP20050250604 |
申请日期 |
2005.02.03 |
申请人 |
SONY ERICSSON MOBILE COMMUNICATIONS JAPAN, INC. |
发明人 |
KUSUNOKI, SHIGEO;KAWAKAMI, KATSUJI |
分类号 |
H03F1/32;H03F3/24;H04B1/04;(IPC1-7):H03F1/32 |
主分类号 |
H03F1/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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