Patent ID: 7940830

Claim:
A frequency synthesizer for use in a fast frequency hopping communications device, the frequency synthesizer comprising: a plurality of oscillators, each oscillator having a first input coupled to a reference clock frequency signal, and each oscillator comprising an injection locked oscillator configured to be injection locked to a harmonic of a reference clock frequency of the reference clock frequency signal, wherein a first oscillator of the plurality of oscillators is configured to be injection locked to one harmonic of the reference clock frequency and a second oscillator of the plurality of oscillators is configured to be simultaneously injection locked to a different harmonic of the reference clock frequency; and a signal selector having a control signal input and a plurality of reference clock inputs, each reference clock input coupled to an output from an oscillator in the plurality of oscillators, the signal selector to couple a reference clock input to an output based on a control signal provided by the control signal input.