CIRCUIT FOR GENERATING PUMPING VOLTAGE OF SEMICONDUCTOR MEMORY APPARATUS

摘要

PURPOSE: A pumping voltage generating circuit of a semiconductor memory device is provided to enable a pumping voltage to rapidly reach a target level by generating an oscillator signal according to a first and a second frequency based on a predetermined time. CONSTITUTION: A pumping operation control part(100) generates an oscillator signal if a pump enable signal is enabled. The pumping operation control part generates the oscillator signal of the first frequency during designated time if the pumping enable signal(pump_en) is enabled. The pumping operation control part generates the oscillator signal of the secondary frequency after the designated time. A pumping part(300) executes a pumping operation in response to the oscillator signal. The pumping part executes the pumping voltage through the pumping operation.