Patent ID: 8193843

Claim:
A charge pump comprising: a first pass transistor having a control input, a first output, a second output and an n-well input; a second pass transistor having a control input, a first output, a second output and a p-well input, wherein the first output of the first pass transistor is coupled to the first output of the second pass transistor to create a charge pump output; a first current source including a first current source output coupled to the second output of the first pass transistor; a second current source including a second current source output coupled to the second output of the second pass transistor; and a tracking circuit including a tracking voltage input coupled to the charge pump output, a first bias voltage output coupled to the n-well input of the first pass transistor, and a second bias voltage output coupled to the p-well input of the second pass transistor, wherein the tracking circuit is configured to continuously regulate the first bias voltage output at the n-well input of the first pass transistor and the second bias voltage output at the p-well input of the second pass transistor relative to a charge pump output voltage at the charge pump output.