Abstract: A converter of a wireless communication system includes a first circuit configured to perform a buck operation, a second circuit configured to perform a boost operation, an inductor coupling the first circuit and the second circuit, and a third circuit including a first resistor and a first diode. The first circuit includes a first field effect transistor (FET), a second FET, a first capacitor, and a first drive circuit. The second circuit includes a third FET, a fourth FET, a second capacitor, a first Zener diode, and a second drive circuit, and the first Zener diode. The third circuit is coupled to a first node to which the first drive circuit and the first capacitor are coupled and is coupled to a second node to which the second drive circuit, the second capacitor, and the first Zener diode are coupled.