ELECTROSTATIC PROTECTION CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide an electrostatic protection circuit which can surely protect an inner circuit against static electricity having a high build-up speed. SOLUTION: An electrostatic protection circuit 1 for protecting an inner circuit 4 against static electricity applied to an input terminal 2 has a ground terminal, a first transistor Q1 wherein a collector is connected to the input terminal 2 and an emitter is connected to a ground terminal and a second transistor Q2 wherein an emitter of a transistor with a collector and a base connected is connected to the input terminal 2 and a connection point between a collector and a base is connected to a base of the first transistor Q1. It further has a diode D1 wherein a cathode is connected to the input terminal 2 and an anode is connected to a ground terminal. COPYRIGHT: (C)2003,JPO