CHARGE PUMP CIRCUIT

An apparatus includes first and second capacitors, first and second switches, a current source, a first circuit, and a second circuit. The first switch is coupled between a first terminal of the first capacitor and a reference terminal. The current source has an input coupled to a power terminal. The second switch is coupled between the first terminal of the first capacitor and an output of the current source. The second capacitor has a first terminal coupled to the reference terminal. The first circuit has a first terminal coupled to a second terminal of the second capacitor, and a second terminal coupled to a second terminal of the first capacitor. The second circuit has a first input coupled to a third terminal of the first circuit, a second input coupled to the power terminal, and an output coupled to the output of the current source.