an amplifier, a loop phase shifter responsive to a control signal, and a resonator arranged in a loop to oscillate and produce a first signal at a carrier frequency, a second signal produced by reflection of a portion of the first signal by the resonator;

a carrier suppression circuit responsive to the first and second signals to produce a carrier suppressed signal, a mixer responsive to the carrier suppressed signal and the first signal to produce an error signal corresponding to the phase difference between the first and second signals, wherein the error signal responds linearly to changes in the carrier frequency;

a control signal generator including a feedback amplifier that amplifies the error signal to provide the control signal to the loop phase shifter to suppress close-in phase noise near the carrier frequency; and

a vibration sense circuit configured to produce a vibration compensation signal indicative of mechanical vibrations, said vibration compensation signal summed with the error signal and fed to the control signal generator to reduce the effects of mechanical vibrations on oscillator phase noise.