Patent ID: 7518433

Claim:
A voltage pumping device comprising: an oscillator for operating in response to a voltage pumping enable signal and a clock enable signal and generating a desired pulse signal in a normal operation mode; a clock supply controller for receiving an external clock signal and operating in response to the voltage pumping enable signal and the clock enable signal and outputting a clock signal in a low-power operation mode; and a voltage pump for receiving the desired pulse signal from the oscillator and the clock signal from the clock supply controller and performing a voltage pumping operation in response to the desired pulse signal in the normal operation mode and performing the voltage pumping operation in response to the clock signal in the low-power operation mode wherein the oscillator includes a first logic unit for performing a logic operation with respect to a buffered signal of the clock enable signal and the voltage pumping enable signal; and an inverter chain operating in response to an output signal from the first logic unit.