Patent ID: 11885647
Assignee: ROHM CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 11:
12. The sensor apparatus of claim 1, wherein the output signal is a first output signal, and the sensor apparatus further comprises:
a second transducer configured to detect a second position of the resonator;
a second damping resistor configured to electrostatically actuate the second transducer and convert the thermomechanical noise of the resonator to a second electromechanical noise;
a third switch configured to receive a third signal from the second transducer;
a second filter stage configured to receive the third signal and adjust a phase and a gain of the third signal and output a filtered third signal; and
a fourth switch configured to receive a fourth signal from the second transducer,
wherein the noise rejection stage is configured to receive the filtered third signal and the fourth signal and reduce the filtered third signal from a second output signal, and
wherein the noise rejection stage is configured to make a differential measurement between the output signal and the second output signal.