Patent ID: 7271600

Claim:
A semiconductor switch circuit comprising: a first semiconductor switch, a second semiconductor switch, and a third semiconductor switch inserted between an input terminal and an output terminal and connected in series; first and second voltage application means connected in parallel to the first semiconductor switch, one end of which is connected to said input terminal and the other end is connected to one end of the second semiconductor switch, and to the third semiconductor switch, one end of which is connected to the other end of the second semiconductor switch and the other end is connected to said output terminal; and switch control means for operating and controlling said first semiconductor switch, second semiconductor switch, and third semiconductor switch in the ON and OFF states, and simultaneously operating and controlling the first and second voltage application means in the OFF and ON states in a reverse mode; wherein when said first semiconductor switch, second semiconductor switch, and third semiconductor switch are operated and controlled in the OFF state by the switch control means, said first and second voltage application means are each controlled to the ON state, the first voltage application means applies the potential of the input terminal to a first voltage application point that is the junction between said first semiconductor switch and second semiconductor switch, and the second voltage application means applies the potential of the output terminal to a second voltage application point that is the junction between said second semiconductor switch and third semiconductor switch.