Radio-frequency circuit and communication device

A radio-frequency circuit comprising:

• a first power amplifier circuit and a second power amplifier circuit;
• a first switch having a first common terminal, a third common terminal, a first selection terminal, a first monitor terminal, and a second monitor terminal, the first common terminal being connected to the first power amplifier circuit and being selectively connected to the first selection terminal, and the third common terminal being connected to the second power amplifier circuit;
• a filter having first and second terminals, the first terminal being connected to the first selection terminal;
• a second switch having a second selection terminal and a second common terminal, the second selection terminal being connected to the second terminal of the filter, the second common terminal being selectively connected to the second selection terminal;
• a first capacitive element in the first switch, the first capacitive element being connected to the first common terminal and to the first monitor terminal;
• a second capacitive element in the first switch, the first capacitive element being connected to the third common terminal and to the second monitor terminal;
• and
• a controller connected to the first monitor terminal and to the second monitor terminal.