Patent ID: 7019735

Claim:
A pumping circuit, comprising: a first transistor having a first electrode region and a third electrode region, which are supplied with a power source voltage, and a second electrode region connected to a potential of a first intermediate node; a second transistor having a first electrode region supplied with a power source voltage, a second electrode region connected to a potential of a second intermediate node and a third electrode region connected to the potential of said first intermediate node; and a third transistor having a first electrode region connected to the potential of said second intermediate node, a second electrode region connected to an output portion together with a third capacitor, and a third electrode region connected to the potential of said first intermediate node, wherein a first clock input portion for receiving a first clock signal through a first capacitor is connected to said first intermediate node, and a second clock input portion ofr receiving a second clock signal through a second capacitor is connected to said second intermediate node.