| 摘要 |
PROBLEM TO BE SOLVED: To linearize the amplification characteristic of a power amplifier in a wireless communication system. SOLUTION: In the transmitter, a feedback mechanism 150 is incorporated in the transmitter. The feedback mechanism 150 adjusts a feed back gain affecting the whole gain of a signal and thereby efficiently controls a signal power level. A phase difference between the component of the signal and a signal obtained by feeding back the signal is corrected. The linearity of a power amplifier 131 is amplified and the feedback mechanism 150 is stabilized. |
