| 摘要 |
PROBLEM TO BE SOLVED: To provide an amplification device capable of suppressing a &Dgr; gain even in the case where a frequency band of an input signal is set to a wider band.SOLUTION: An amplification device 7 includes: a driver amplifier 5 for amplifying an input signal P; a power amplifier 6 provided on a post-stage of the driver amplifier 5 for amplifying a signal Poutputted from the driver amplifier 5 and outputting an output signal P; and a variable phase shifter 7 provided between the driver amplifier 5 and the power amplifier 6 for adjusting a phase of the signal Poutputted by the driver amplifier 5 and giving the signal to the power amplifier 6. The variable phase shifter 7 includes a control section 9 for adjusting the phase of the signal outputted by the driver amplifier 5 so as to suppress an increase/decrease range of a gain change of the output signal Pin the case where the input signal Pwithin a predetermined frequency band is amplified. |
