CIRCUIT FOR REDUCING VOLTAGE VARIATION OF SEMICONDUCTOR DEVICE

摘要

PURPOSE: A circuit for reducing voltage variation of a semiconductor device is provided to stably guarantee noise margin by reducing a variation phenomenon of power supply, and to eliminate over-current caused by overshooting and undershooting. CONSTITUTION: A reference voltage generating circuit generates a reference voltage. A switching circuit receives the reference voltage, and has a threshold voltage smaller than a difference between a power supply voltage of a power supply voltage terminal or ground terminal and the reference voltage. The switching circuit turns on when the voltage difference is larger than the threshold voltage, and reduces a variation phenomenon of power supply of a semiconductor device.