Patent ID: 8378758

Claim:
A parametric feedback oscillator, comprising: a power input terminal configured to accept a source of electrical power; a resonator having at least one transduction element and at least one electromechanical resonating element, said electromechanical resonating element configured to accept as input a parametric excitation signal at a frequency 2 ω 0 and to provide a resonating output signal at a frequency ω 0 ; a cascaded feedback path comprising in any electrically coupled cascade order: at least one non-linear element disposed within said cascaded feedback path and coupled to said resonator, said non-linear element configured to receive said resonating output signal at ω 0 and configured to provide a non-linear element output signal at a frequency 2 ω 0 ; at least one phase shifter electrically disposed within said cascaded feedback path, said phase shifter configured to receive a phase shifter input signal and configured to provide a phase shifted output signal relative to said phase shifter input signal; at least one amplifier electrically disposed within said cascaded feedback path, said amplifier configured to receive an amplifier input signal and configured to provide an amplifier output signal comprising an amplified signal relative to said amplifier input signal, and configured to accept electrical power from said power input terminal; said cascade feedback path configured to receive as input said resonating output signal at a frequency ω 0 and configured to provide as output a feedback path signal as said parametric excitation signal at a frequency 2 ω 0 to said resonator; and a parametric feedback oscillator output terminal configured to provide said resonating output signal at said frequency ω 0 as an output signal.