Patent ID: 7965117

Claim:
A charge pump, comprising: a charge pump core circuit having a first current source transistor, a second current source transistor, and an output terminal; a replica bias circuit having a first reference current source transistor, a second reference current source transistor connected in series with the first reference current source transistor, a dummy circuit connected between the first and second reference current source transistors, and a reference node corresponding to the output terminal of the charge pump core circuit, wherein the reference node is connected to gates of the second current source transistor and the second reference current source transistor; and a regulator circuit having a first input connected to the output terminal of the charge pump core circuit, a second input connected to the reference node of the replica bias circuit, and an output connected to gates of the first current source transistor and the first reference current source transistor, and wherein the dummy circuit comprises a first PMOS transistor connected in series with a first NMOS transistor, and wherein the dummy circuit mirrors a corresponding voltage drop across switching circuitry in the charge pump core circuit.