| 摘要 |
PROBLEM TO BE SOLVED: To provide an amplifier device for precisely amplifying a signal. SOLUTION: An HPA 104 amplifies an RF signal by using a voltage to be supplied. A first power source 110 and a second power source 111 generate a low voltage and a high voltage with amplitude larger than that of the lower voltage. A digital processing part 101 and a switch 113 supply the low voltage and the high voltage generated by the first power source 110 and the second power source 111 to the HPA 104 by performing changeover in such a timely manner that an electric current in the envelop signal of the RF signal becomes zero. COPYRIGHT: (C)2011,JPO&INPIT |
