| 摘要 |
PURPOSE: An amplification device is provided to reduce manufacturing costs due to increase in process costs and to prevent characteristic degradation. CONSTITUTION: An amplification device includes an input terminal, a first amplifier(102), a second amplifier(104) and a switching unit. The input terminal inputs a high frequency signal. The first amplifier is connected to a high frequency signal output terminal, includes a bipolar transistor and amplifies the high frequency signal inputted from the input terminal. The second amplifier has the maximum output power lower than the first amplifier, includes a bipolar transistor and amplifies the high frequency signal inputted from the input terminal. The switching unit is connected in between the second amplifier and output terminal and selectively outputs the high frequency signal amplified by the second amplifier.
|
