| 摘要 |
PROBLEM TO BE SOLVED: To provide an interface of much higher reliability between a driving circuit of a semiconductor power element and a microcomputer for controlling the output signal of the driving circuit. SOLUTION: In the interface between the driving circuit of a high active system for driving the prescribed semiconductor power element and the microcomputer for controlling the output signal of the driving circuit, the microcomputer has a transistor, with which a collector terminal forms the output side of the microcomputer, and on the other hand, the driving circuit has a first resistor directly connected to the output side of the microcomputer on one terminal side, a Schmidt circuit serially connected to the other terminal side of the first resistor, a diode connected between the first resistor and the Schmidt circuit on the side of cathode, a power supply voltage connected on the anode side of the diode, and second resistor grounded on one terminal side and connected to a side forming the input terminal of the driving circuit in the first resistor on the other terminal side.
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