Patent ID: 7224234

Claim:
A method of adjusting a signal frequency of a voltage controlled oscillator (VCO) in a radio frequency (RF) device, comprising: selecting an oscillator of a plurality of oscillators within the VCO; selecting a gain cell of a plurality of gain cells based on the selected oscillator, the selected gain cell contributing to a charge pump current; inputting a first signal that is a function of a reference signal; inputting a second signal that is a function of a VCO signal; comparing the first signal and the second signal; selectively switching one or more capacitors into or out of an LC circuit that is operatively coupled to the VCO, the selective switching being based on the comparison of the first signal and the second signal; and selectively activating a group of a plurality of groups of current sources within the selected gain cell based on the selectively switched one or more capacitors, the selectively activated group contributing to the charge pump current.