Patent ID: 7002427

Claim:
An integrated circuit, comprising: an adjustable phase shifter operable to receive a reference signal and introduce a phase shift in the reference signal to produce a phase shifted reference signal; a phase detector operable to identify a phase difference between the reference signal and the phase shifted reference signal; a control signal generator operable to: generate a plurality of control signals, each of the control signals capable of causing the adjustable phase shifter to adjust a magnitude of at least one component value in the adjustable phase shifter, wherein the phase shift introduced by the adjustable phase shifter is based at least partially on the magnitude of the at least one component value in the adjustable phase shifter; and select one of the control signals, the selected control signal capable of causing the adjustable phase shifter to produce the phase shifted reference signal such that the phase difference attains a specified value; and an analog filter operable to adjust a magnitude of at least one component value in the analog filter based at least partially on the selected control signal.