| 摘要 |
A logic selection circuit for selectively matching the transistor logic type of a first interfacing circuit with the transistor logic type of a second interfacing circuit. The logic selection circuit comprises a circuit latching means which latches the level of voltage signal present at the second interfacing circuit while receiving a signal from the first interfacing circuit. The logic selection circuit further comprises both an NPN transistor and a PNP transistor to ensure that the transistor logic type of the first interfacing circuit and the transistor logic type of the second interfacing circuit may be properly matched. The logic selection circuit disclosed may be utilized in a conventional magnetic proximity sensor which helps to control the movement of a piston within a cylinder.
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