| 摘要 |
PROBLEM TO BE SOLVED: To suppress the reception band noise in a power amplifier module using a power supply voltage supplied from a DC-DC converter.SOLUTION: The power amplifier module includes: a first power amplifier which amplifies a first signal and outputs a second signal; a first noise elimination circuit which is input with a first voltage supplied from a DC-DC converter and outputs a second voltage having removed noise of the first voltage as a power supply voltage of the first power amplifier.SELECTED DRAWING: Figure 5 |
