Patent ID: 7276959

Claim:
A pumping circuit of a semiconductor device, comprising: a first transfer pump for transferring a voltage at a first electric potential of a first node to a second node; a power supply unit for supplying a power source voltage to the first node; a first pumping unit coupled to the first node for pumping the power source voltage applied to the first node; a first pump control unit for controlling a voltage applied to a gate of the first transfer pump; a second pumping unit coupled to the second node for selectively pumping a second electric potential of the second node; a second transfer pump for transferring the voltage at the second electric potential of the second node to a high voltage output terminal; and a second pump control unit for controlling a voltage applied to a gate of the second transfer pump, wherein if the power source voltage is higher than a predetermined voltage, the first pumping unit performs a pumping operation, and the second pumping unit does not perform a pumping.