Patent ID: 7888980

Claim:
A charge pump for a phase locked loop (PLL), the charge pump comprising: a first source-switched current mirror comprising: a source PMOS transistor having a drain connected to a first current source; an output PMOS transistor having a drain connected to an output of the charge pump, wherein gates of the source and output PMOS transistors are coupled together by a first conductive link; a PMOS switch coupled between a supply voltage source and a source of the output PMOS transistor of the first current mirror; and a PMOS tuner coupled between the PMOS switch and the output PMOS transistor of the first current mirror, wherein a source of the PMOS tuner is coupled to a drain of the PMOS switch and to the source of the output PMOS transistor, and a drain of the PMOS tuner is coupled to the first conductive link between the source and output PMOS transistors of the first current mirror.