HIGH-FREQUENCY SEMICONDUCTOR SWITCH AND TERMINAL DEVICE

PROBLEM TO BE SOLVED: To shorten the wake-up time of a high-frequency semiconductor switch.SOLUTION: A high-frequency semiconductor switch includes a power-supply circuit, a drive circuit, and a switch circuit. The power-supply circuit has an oscillation circuit that receives a high-potential-side power source, generates a first oscillation signal by a control signal of an enable state, and generates a second oscillation signal with a lower frequency than the first oscillation signal by a control signal of a disable state; and generates a first voltage on the basis of the first oscillation signal or the second oscillation signal. The drive circuit includes a level shift circuit that receives the first voltage as a power source and generates a differential signal that is level-shifted. The switch circuit selectively connects between an RF common signal terminal and an RF signal terminal on the basis of the differential signal outputted from the drive circuit.