Patent ID: 6838928

Claim:
A boosting circuit comprising: a plurality of boosting circuit units connected in series; and a clock signal supply circuit supplying a clock signal to switch said plurality of boosting circuit units between a setup state and a pump up state, wherein said clock signal supply circuit includes a delay circuit to provide a time difference in the time of said clock signal arriving at respective said plurality of boosting circuit units, each of said boosting circuit units includes: a capacitive element for a boosting operation, the first electrode of which is connected to an input node and the second electrode of which is connected to an output node; and a switch, in the setup state, for connecting the output node to a first power supply potential and disconnecting the first electrode of the capacitive element from the input node to connect the first electrode to a second power supply potential, and in the pump up state, for disconnecting the output node from the first power supply potential and connecting the first electrode to the input node.