Patent ID: 11906306
Assignee: STMICROELECTRONICS S.R.L.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A method comprising:
oscillating an inertial measurement unit via a driving signal provided by driving circuitry;
receiving, by a lock-in amplifier, a sensing signal from the inertial measurement unit and a reference demodulation signal which is a function of the driving signal;
providing, by the lock-in amplifier, an inertial measurement signal based on the sensing signal and the reference demodulation signal, wherein the reference demodulation signal is affected by a variable phase error,
receiving, by a phase meter circuitry, the driving signal and the sensing signal, and providing, as a function of a phase difference between the driving signal and the sensing signal, a phase correction signal for the reference demodulation signal; and
applying, by a correction node, the phase correction signal to the reference demodulation signal of the lock-in amplifier so that, in response to the phase correction signal being applied to the reference demodulation signal of the lock-in amplifier, the phase error is maintained in a vicinity of a reference value.