公开(公告)号：US11906306B2

公开(公告)日：2024-02-20

申请号：US17750074

申请日：2022-05-20

Applicant: STMicroelectronics S.r.l.

Inventor： Giacomo Langfelder ,  Leonardo Gaffuri Pagani ,  Luca Guerinoni ,  Luca Giuseppe Falorni ,  Patrick Fedeli ,  Paola Carulli

IPC: G01C19/5776 ,  G01C19/5712

CPC classification number: G01C19/5712 ,  G01C19/5776

Abstract: In an embodiment a circuit includes an inertial measurement unit configured to be oscillated via a driving signal provided by driving circuitry, a lock-in amplifier configured to receive a sensing signal from the inertial measurement unit and a reference demodulation signal which is a function of the driving signal and provide an inertial measurement signal based on the sensing signal, wherein the reference demodulation signal is affected by a variable phase error, phase meter circuitry configured to receive the driving signal and the sensing signal and provide, 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 a correction node configured to apply the phase correction signal to the reference demodulation signal so that, in response to the phase correction signal being applied to the reference demodulation signal, the phase error is maintained in a vicinity of a reference value.

公开(公告)号：US20220390234A1

公开(公告)日：2022-12-08

申请号：US17750074

申请日：2022-05-20

Applicant: STMicroelectronics S.r.l.

Inventor： Giacomo Langfelder ,  Leonardo Gaffuri Pagani ,  Luca Guerinoni ,  Luca Giuseppe Falorni ,  Patrick Fedeli ,  Paola Carulli

IPC: G01C19/5712 ,  G01C19/5776

Abstract: In an embodiment a circuit includes an inertial measurement unit configured to be oscillated via a driving signal provided by driving circuitry, a lock-in amplifier configured to receive a sensing signal from the inertial measurement unit and a reference demodulation signal which is a function of the driving signal and provide an inertial measurement signal based on the sensing signal, wherein the reference demodulation signal is affected by a variable phase error, phase meter circuitry configured to receive the driving signal and the sensing signal and provide, 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 a correction node configured to apply the phase correction signal to the reference demodulation signal so that, in response to the phase correction signal being applied to the reference demodulation signal, the phase error is maintained in a vicinity of a reference value.