Power amplification module
Provided is a power amplification module that includes: a first power amplifier that amplifies a first signal and outputs a second signal; and a first noise removing circuit that is inputted with a first voltage supplied from a DC-DC converter, removes noise from the first voltage in order to generate a second voltage, and outputs the second voltage as a power supply voltage of the first power amplifier.
1. A power amplification module comprising:
a first power amplifier amplifying a first signal and outputting a second signal;
a second power amplifier amplifying a third signal and outputting the first signal; and
a first noise removing circuit inputted with a first voltage supplied from a DC-DC converter, the first noise removing circuit removing noise from the first voltage in order to generate a second voltage, and outputting the second voltage as a power supply voltage of the first power amplifier and the second power amplifier, the first noise removing circuit comprising:
a first inductor; and
a first capacitor,
wherein a first terminal of the first inductor is supplied with the first voltage, a second terminal of the first inductor is connected to a second inductor and to a first terminal of the first capacitor, and a second terminal of the first capacitor is connected to ground, and
wherein the first inductor and the first capacitor form a low pass filter, a cutoff frequency of the low pass filter being less than a transmission frequency and a reception frequency of the power amplification module.
2. The power amplification module according to claim 1 , wherein the first voltage varies in accordance with an amplitude of the first signal.
3. The power amplification module according to claim 1 , wherein the first voltage varies in accordance with an average output power of the power amplification module.
4. The power amplification module according to claim 1 , wherein the DC-DC converter is built into the power amplification module.
5. The power amplification module according to claim 1 , wherein the first noise removing circuit adjusts a frequency at which noise removal is performed in accordance with a frequency control signal.
6. The power amplification module according to claim 2 , wherein the DC-DC converter is built into the power amplification module.
7. The power amplification module according to claim 3 , wherein the DC-DC converter is built into the power amplification module.
8. The power amplification module according to claim 2 , wherein the first noise removing circuit adjusts a frequency at which noise removal is performed in accordance with a frequency control signal.
9. The power amplification module according to claim 3 , wherein the first noise removing circuit adjusts a frequency at which noise removal is performed in accordance with a frequency control signal.
10. The power amplification module according to claim 4 , wherein the first noise removing circuit adjusts a frequency at which noise removal is performed in accordance with a frequency control signal.