| 摘要 |
PROBLEM TO BE SOLVED: To protect a transistor in a circuit even when a voltage not less than the withstand voltage of the transistor is externally applied. SOLUTION: The semiconductor device comprises a first circuit provided with the transistor, a terminal for connecting the first circuit to a second circuit to which a predetermined voltage is applied, a plurality of first protection parts connected in series between the terminal and a positive power source, and a plurality of second protections connected in series between the terminal and a negative power source. Further, in another embodiment, the semiconductor device comprises a plurality of first protections connected in series between one of the positive power source and the negative power source and a voltage application part applied with a first voltage, and a plurality of second protections connected in series between the voltage application and the terminal. COPYRIGHT: (C)2006,JPO&NCIPI
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