Patent ID: 7808301

Claim:
A multiple-stage charge pump circuit, comprising: a first pump capacitor and a second pump capacitor each comprising a first terminal and a second terminal; a charge recycle circuit for connecting the second terminal of the first pump capacitor to the second terminal of the second pump capacitor in a first time period, the charge recycle circuit comprising: a first node; a first switch circuit, which turns on in a second time period and a third time period to provide a first voltage to the first node, and turns off in the first time period; and a first driving circuit and a second driving circuit for connecting the second terminal of the first pump capacitor and the second terminal of the second pump capacitor to the first node in response to a first clock signal and a second clock signal in the first time period, respectively; a first transfer circuit for providing a supply voltage to the first terminal of the first pump capacitor in the second time period; and a second transfer circuit for providing a voltage of the first terminal of the first pump capacitor to the first terminal of the second pump capacitor in the third time period.