Amplifier equipped with circuit for preventing electrostatic breakdown

摘要

A circuit for preventing electrostatic breakdown consists of a resistor which is connected between ground and an input terminal of an amplifier including a transistor. A d-c voltage source applies a constant voltage to the resistor at all times, and a series circuit consisting of a diode and a Zener diode connected cathode to cathode. The anode of the Zener diode is grounded in parallel with the above-mentioned resistor, and the Zener voltage of the Zener diode is set so as to be greater than the voltage across the resistor.