Patent ID: 7990742

Claim:
A charge pump circuit comprising: an input terminal; first and second output terminals; a common terminal; a first pair of flying capacitor terminals comprising first and second flying capacitor terminals; a second pair of flying capacitor terminals comprising third and fourth flying capacitor terminals; and a switch network, said switch network comprising: a first switch for coupling the input terminal to the first flying capacitor terminal, a second switch for coupling the first flying capacitor terminal to the first output terminal, a third switch for coupling the first flying capacitor terminal to said third flying capacitor terminal, wherein if the third switch is closed and the other switches in the switch network are open, the first flying capacitor terminal is coupled to only the third flying capacitor terminal, a fourth switch for coupling the second flying capacitor terminal to said common terminal, a fifth switch for coupling the second flying capacitor terminal to said third flying capacitor terminal, a sixth switch for coupling the second flying capacitor terminal to the fourth flying capacitor terminal, a seventh switch for coupling the fourth flying capacitor terminal to the common terminal, and an eighth switch for coupling the fourth flying capacitor terminal to the second output terminal.