| 摘要 |
Disclosed is an analog switch circuit which has: an analog switch which is composed of a P-channel first transistor and a N-channel second transistor whose drains are connected to each other and whose sources are connected to each other; first and second diodes which are in parallel and reversely to each other connected between a back gate of the first transistor and a high-potential power source; and third and fourth diodes which are in parallel and reversely to each other connected between a back gate of the second transistor and a low-potential power source. Further disclosed is an analog switch circuit which has: an analog switch which is composed of a P-channel first transistor and a N-channel second transistor whose drains are connected to each other and whose sources are connected to each other; and a N-channel third transistor whose gate is connected to a high-potential power source and/or a P-channel fourth transistor whose gate is connected to a low-potential power source; wherein the third transistor and/or the fourth transistor are/is in series connected between an input terminal and an input terminal of the analog switch.
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