Patent ID: 8156805

Claim:
An inertial sensor, comprising: a drive oscillator; a transducer unit having a first input coupled to the drive oscillator, an output providing a signal responsive to motion of the transducer unit experiencing an angular velocity, a second input, and a third input, wherein the transducer unit includes a sense resonator; a frequency tuning unit having an output coupled to the second input of the transducer for altering a resonant frequency of the sense resonator of the transducer, and an input; a capacitance-to-voltage amplifier having an input coupled to the output of the sense resonator, and an output; a synchronous demodulator having an input coupled to the output of the capacitance-to-voltage amplifier, and an output providing a pair of baseband signals, wherein one of the pair is representative of the angular velocity; a transducer feedback control system having a pair of inputs for receiving the pair of baseband signals, and an output coupled to the third input of the transducer unit; and extraction means for performing a Goertzel algorithm on the pair of baseband signals, multiplying results of performing the Goertzel algorithm, and providing a signal on an output responsive to the results, wherein the output of the extraction means is coupled to the input of the frequency tuning unit.