Patent ID: 7403062

Claim:
A dual edge modulated charge pumping circuit, comprising: an output terminal for providing an output voltage; a charge pumping conversion circuit having a first capacitor, a second capacitor, and a switch combination circuit, in which the second capacitor is coupled between the output terminal and a ground potential; and a dual edge modulated control circuit for controlling the switch combination circuit so as to operate the charge pumping conversion circuit with a first phase, a second phase, a third phase, and a fourth phase, wherein: a first electrode of the first capacitor is floated during the first phase; the first capacitor is coupled between the ground potential and an input voltage during the second phase; the first capacitor is coupled between the input voltage and the output terminal during the third phase; the first electrode of the first capacitor is floated during the fourth phase; the dual edge modulated control circuit modulates an operation time of the second phase and an operation time of the third phase in response to a change of the output voltage; and the operation time of the second phase is equivalent to the operation time of the third phase.