| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrostatic protection circuit equipped with an SCR element having a high SCR trigger current only by the SCR element having a basic structure, without adding a new element. SOLUTION: The emitter and base of a PNP bipolar transistor 7 are connected to an anode terminal 5, and its collector is connected to the base of an NPN bipolar transistor 8. The emitter of the NPN bipolar transistor 8 is connected to a cathode terminal 6, its base is connected to the cathode terminal 6 through a resistance R1, and its collector is connected to the base of the PNP bipolar transistor 7 through a second resistance R2. COPYRIGHT: (C)2009,JPO&INPIT
|
