Patent ID: 6952116

Claim:
A charge pump, comprising: a first capacitor having first and second terminals, the first terminal being coupled to a pumped node; a second capacitor having first and second terminals, the first terminal being coupled to the pumped node; a charging circuit coupled to the pumped node, the charging circuit being operable to charge the first and second capacitors through the pumped node responsive to a charge enable signal; a first pumping circuit having an output signal, the first pumping circuit transitioning the output signal from a first logic level to a second logic level responsive to a predetermined transition of a first control signal; a second pumping circuit having an output signal, the second pumping circuit transitioning the output signal from a third logic level to a fourth logic level responsive to a predetermined transition of a second control signal; a first isolation circuit coupled between the output of the first pumping circuit and the second terminal of the first capacitor, the first isolation circuit isolating the first pumping circuit from the second terminal of the first capacitor responsive to a first logic level of an isolation signal and coupling the output of the first pumping circuit to the second terminal of the first capacitor responsive to a second logic level of the isolation signal; and an output circuit coupled to the pumped node, the output circuit being operable to couple the pumped node to an output terminal responsive to an output enable signal; and a control circuit operable to generate the charge enable signal, the first and second control signals, the first isolation signal, and the output enable signal.