| 摘要 |
PROBLEM TO BE SOLVED: To obtain an output signal with a little distortion at a high power efficiency with suppressing the increase of the circuit scale of an amplifier circuit. SOLUTION: A first and second adders 103, 104 add a first and second pilot signals to a first and second constant-envelope signals generated from input signals. A first and second amplifiers 111, 112 amplify signals resulting from the addition process. A compositor 113 combine signals resulting from the amplifying process. A pilot signal detector 114 detects a pilot signal component from a signal resulting from the compositing process. A vector adjuster 105 corrects at least one of the gain and the phase of the second constant-envelop signal after the addition process, so that the pilot signal component detected by the detector 114 meets specified conditions. COPYRIGHT: (C)2005,JPO&NCIPI
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