Phase-locked loop with composite feedback signal formed from phase-shifted variants of output signal

A phase-locked loop system, comprising:

• an error detector configured to receive a reference signal;
• and
• a voltage-controlled oscillator subsystem coupled to the error detector, the voltage-controlled oscillator subsystem being configured to produce a primary output signal that tends toward a predefined frequency relationship with the reference signal, and to produce a feedback signal that is routed in a feedback loop back to the error detector,
• where the voltage-controlled oscillator subsystem includes a multiple output voltage-controlled oscillator having a plurality of VCO outputs, each of the plurality of VCO outputs being configured to produce a phase-sifted signal based on the primary output signal, and
• where the voltage-controlled oscillator subsystem further includes a VCO output multiplexer configured to multiplex the phase-shifted signals from the plurality of VCO outputs, to form the feedback signal.