Abstract: A phase-locked loop configured to cause an output signal to tend toward a desired output frequency based on an applied reference signal. In a first configuration, the phase-locked loop includes a voltage controlled oscillator operatively coupled with a bias generator. The voltage controlled oscillator is configured to produce the output signal in response to a VCO current generated via application of a biasing signal from the bias generator. The VCO current produces a regulated VCO voltage within the voltage controlled oscillator, and the bias generator is configured so that the regulated bias generator voltage matches the regulated VCO voltage free of any direct coupling between the bias generator and the regulated VCO voltage. In another configuration, the phase-locked loop includes a charge pump system having semiconductor components that correspond to only a portion of a voltage controlled oscillator associated with the loop.