| 摘要 |
PROBLEM TO BE SOLVED: To reduce the breakdown voltage of a static electricity protection circuit. SOLUTION: The collector of a transistor Q1 is connected to a terminal T1, the base and emitter are connected to a terminal T2, the collector of a transistor Q2 is connected to the terminal T1, the emitter is connected to the terminal T2, the base is connected to the terminal T2 via a resistor R, static electricity with one polarity is clamped by a diode between the base and collector of the transistor Q1, and static electricity with the other polarity is clamped between the collector and emitter of the transistor Q2.
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