CMOS Analogue Switch circuit

摘要

The present invention relates to CMOS analog switches. The CMOS analog switch of the present invention improves the circuit structure, thereby biasing both terminal voltages of MOS devices which are switched on when the power supply voltage is applied to the substrate node of the MOS, and also, when switching off, Bias in the ground voltage (vss) state. When an abnormal high voltage is applied to both ends of the MOS device, the substrate voltage of the floating MOS device is biased to the ground voltage (vss). As a result, the threshold voltage and the conduction resistance are reduced and the frequency bandwidth is increased as compared with the conventional analog switches.;