| 摘要 |
PROBLEM TO BE SOLVED: To provide an interface circuit which can stably output a signal detected by a sensor to a control device in a latter stage even when a strong electric wave is received from the outside by constituting the interface circuit in such a manner that unfavorable effects from the outside can be avoided by taking a protective measure for storing electric waves. SOLUTION: This interface circuit introduces a high level signal and a low level signal which are inputted to the control device 21. In this case, the interface circuit 16 is constituted in such a manner that transistors Tr1, Tr2, Tr5 and Tr8 which are used to transmit the inputted low level signal are set under a continuity.
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