Semiconductor switch circuit
View Patent ↗A semiconductor switch circuit is provided that enables current consumption to be reduced even in a conduction state. A semiconductor switch circuit 100 has P-type MOS transistors Q 101 and Q 102 for conduction that share a source and are connected in series between an input/output terminal 101 and input/output terminal 102 , a P-type MOS transistor Q 103 and N-type MOS transistor Q 105 having drains connected to the gate of Q 101 , a P-type MOS transistor Q 104 and N-type MOS transistor Q 106 having drains connected to the gate of Q 102 , and a control terminal 103 connected to the gates of the transistors. Further semiconductor switch circuit 100 is configured with the sources and back gates of Q 103 and Q 104 connected to the sources of Q 101 and Q 102 . Therefore, it is possible to switch the path between input/output terminal 101 and input/output terminal 102 between a conduction state and non-conduction state by means of voltage control by voltage value Vcont of a control signal applied to control terminal 103.
1. A semiconductor switch circuit comprising:
first and second MOS transistors for conduction that share a source and are connected in series between a first input/output terminal and second input/output terminal;
a first inverter having high-potential-side power supply connected to a source and back gate of said first MOS transistor, and having output connected to a gate of said first MOS transistor;
a second inverter having high-potential-side power supply connected to a source and back gate of said second MOS transistor, and having output connected to a gate of said second MOS transistor; and
a control terminal connected to inputs of said first and second inverters.
2. The semiconductor switch circuit according to claim 1 , wherein said first and second inverters have a CMOS inverter structure configured with a P-type MOS transistor and N-type MOS transistor.
3. The semiconductor switch circuit according to claim 1 , wherein said first inverter is configured with a NOR gate.
4. The semiconductor switch circuit according to claim 1 , wherein said second inverter is configured with a NOR gate.
5. The semiconductor switch circuit according to claim 1 , wherein said first inverter is configured with a NAND gate.
6. The semiconductor switch circuit according to claim 1 , wherein said second inverter is configured with a NAND gate.