Integrated circuit

Abstract

An integrated circuit includes a single pole double throw switch including a transmitting and receiving port, a transmitting port, and a receiving port. A transmission switch is coupled between the transmitting port and the transmitting and receiving port. A reception switch is coupled between the receiving port and the transmitting and receiving port. The reception switch includes a field effect transistor having a gate, a drain and a source. A voltage generating circuit receives first and second power supply voltages. The first power supply voltage is greater than the second power supply voltage. The voltage generating circuit generates a third voltage lower than the second power supply voltage and applies the third voltage to the gate of the field effect transistor of the reception switch during transmission. As a result, the magnitude of the voltage difference between the gate and the source or the gate and the drain of the second field effect transistor is greater than the magnitude of the difference between the first and second power supply voltages. Accordingly, because of the increased electrical separation between the terminals of the field effect transistor, leakage current flowing to the receiving port during transmission is reduced.