Power source supply circuit, amplifier, communication device, base station, and power source supply method

A base station of a TDD (Time Domain Duplexing) scheme, comprising:

• a plurality of first power sources that generate power source voltages different from each other;
• a switch circuit that switches and outputs the power source voltages generated by the plurality of first power sources;
• an RF choke circuit that includes a first capacitor connected to an output terminal of the switch circuit;
• a second capacitor provided between the plurality of first power sources and the switch circuit, the second capacitor having a larger capacitance than the first capacitor;
• and
• an amplifying transistor that operates by a power source voltage output from the RF choke circuit,
• wherein at the time of transmission, the base station amplifies a signal by the amplifying transistor, and transmits the amplified signal.

A power source supply method comprising:

• generating power source voltages different from each other by a plurality of first power sources;
• switching by a switch circuit the power source voltages generated by the plurality of first power sources, and outputting them outside from a voltage output terminal;
• providing an RF choke circuit between the switch circuit and the voltage output terminal, the RF choke circuit including a first capacitor;
• and
• providing a second capacitor between the plurality of first power sources and the switch circuit, the second capacitor having a larger capacitance than the first capacitor.