RADIO FREQUENCY SWITCHING CIRCUIT APPLYING DIFFERENT VOLTAGES ACCORDING TO OPERATION STATE AND SEMICONDUCTOR DEVICE

摘要

PURPOSE: A radio frequency switching circuit and a semiconductor device are provided to improve waveform maintenance capability by applying a high voltage only during transmission, while applying a low voltage otherwise. CONSTITUTION: A radio frequency switching circuit includes a plurality of switching circuit portions arranged between a plurality of input and output terminals which input and output a high frequency signal. Each of the plurality of switching circuit portions is comprised of a circuit including a plurality of field effect transistors(101-116) connected in series. A gate control voltage is applied to gate terminals of the plurality of field effect transistors control on/off state of the switching portion. A drain control voltage is further applied to drain terminals or source terminals of the plurality of field effect transistors of each of the plurality of switching circuit portions. A voltage according to an electric power value of a high frequency signal supplied to the plurality of switching circuit portions is supplied as the gate control voltage and the drain control voltage.