公开(公告)号：US20180274941A1

公开(公告)日：2018-09-27

申请号：US15919882

申请日：2018-03-13

Applicant: STMicroelectronics S.r.l.

Inventor： Matteo Quartiroli ,  Alessandro Mecchia ,  Paolo Pesenti ,  Stefano Facchinetti ,  Andrea Donadel

IPC: G01C25/00 ,  G01C19/5776

CPC classification number: G01C25/005 ,  G01C19/5776

Abstract: A demodulator for demodulating the in-phase component of an input signal which is in-phase and quadrature modulated. The demodulator includes a register storing a phase calibration value and a temperature sensor that performs a plurality of temperature sensings. A compensating stage generates for each temperature sensed a corresponding first sample on the basis of the difference between the sensed temperature and a calibration temperature and a compensation function indicative of a relationship existing between the phase of the input signal and the temperature. A combination stage generates a plurality of second samples, each second sample being a function of the phase calibration value and a corresponding first sample. A generating stage generates a demodulating signal having a phase which depends on the second samples and a demodulating stage demodulates the input signal by means of the demodulating signal.

公开(公告)号：US20210102822A1

公开(公告)日：2021-04-08

申请号：US17125599

申请日：2020-12-17

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Matteo Quartiroli ,  Alessandro Mecchia ,  Paolo Pesenti ,  Stefano Facchinetti ,  Andrea Donadel

IPC: G01C25/00 ,  G01C19/5776 ,  H04L27/22

Abstract: A demodulator for demodulating the in-phase component of an input signal which is in-phase and quadrature modulated. The demodulator includes a register storing a phase calibration value and a temperature sensor that performs a plurality of temperature sensings. A compensating stage generates for each temperature sensed a corresponding first sample on the basis of the difference between the sensed temperature and a calibration temperature and a compensation function indicative of a relationship existing between the phase of the input signal and the temperature. A combination stage generates a plurality of second samples, each second sample being a function of the phase calibration value and a corresponding first sample. A generating stage generates a demodulating signal having a phase which depends on the second samples and a demodulating stage demodulates the input signal by means of the demodulating signal.

公开(公告)号：US11841229B2

公开(公告)日：2023-12-12

申请号：US17179225

申请日：2021-02-18

Applicant: STMicroelectronics S.r.l.

Inventor： Stefano Facchinetti

IPC: G01C19/5776 ,  G01C19/5712

CPC classification number: G01C19/5776 ,  G01C19/5712

Abstract: A driving circuit for a microelectromechanical system (MEMS) gyroscope operating based on the Coriolis effect is provided. The driving circuit supplies drive signals to a mobile mass of the MEMS gyroscope to cause a driving movement of the mobile mass to oscillate at an oscillation frequency. The driving circuit includes an input stage, which receives at least one electrical quantity representing the driving movement and generates a drive signal based on the electrical quantity; a measurement stage, which measures an oscillation amplitude of the driving movement based on the drive signal; and a control stage, which generates the drive signals based on a feedback control of the oscillation amplitude. The measurement stage performs a measurement of a time interval during which the drive signal has a given relationship with an amplitude threshold, and measures the oscillation amplitude as a function of the time interval.

公开(公告)号：US11199422B2

公开(公告)日：2021-12-14

申请号：US17125599

申请日：2020-12-17

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Matteo Quartiroli ,  Alessandro Mecchia ,  Paolo Pesenti ,  Stefano Facchinetti ,  Andrea Donadel

IPC: G01C25/00 ,  G01C19/5776 ,  H04L27/22

Abstract: A demodulator for demodulating the in-phase component of an input signal which is in-phase and quadrature modulated. The demodulator includes a register storing a phase calibration value and a temperature sensor that performs a plurality of temperature sensings. A compensating stage generates for each temperature sensed a corresponding first sample on the basis of the difference between the sensed temperature and a calibration temperature and a compensation function indicative of a relationship existing between the phase of the input signal and the temperature. A combination stage generates a plurality of second samples, each second sample being a function of the phase calibration value and a corresponding first sample. A generating stage generates a demodulating signal having a phase which depends on the second samples and a demodulating stage demodulates the input signal by means of the demodulating signal.

公开(公告)号：US10955244B2

公开(公告)日：2021-03-23

申请号：US16123849

申请日：2018-09-06

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Stefano Facchinetti

IPC: G01C19/5776 ,  G01C19/5712

Abstract: A driving circuit for a microelectromechanical system (MEMS) gyroscope operating based on the Coriolis effect is provided. The driving circuit supplies drive signals to a mobile mass of the MEMS gyroscope to cause a driving movement of the mobile mass to oscillate at an oscillation frequency. The driving circuit includes an input stage, which receives at least one electrical quantity representing the driving movement and generates a drive signal based on the electrical quantity; a measurement stage, which measures an oscillation amplitude of the driving movement based on the drive signal; and a control stage, which generates the drive signals based on a feedback control of the oscillation amplitude. The measurement stage performs a measurement of a time interval during which the drive signal has a given relationship with an amplitude threshold, and measures the oscillation amplitude as a function of the time interval.

公开(公告)号：US10900805B2

公开(公告)日：2021-01-26

申请号：US15919882

申请日：2018-03-13

Applicant: STMicroelectronics S.r.l.

Inventor： Matteo Quartiroli ,  Alessandro Mecchia ,  Paolo Pesenti ,  Stefano Facchinetti ,  Andrea Donadel

IPC: G01C25/00 ,  G01C19/5776 ,  H04L27/22

Abstract: A demodulator for demodulating the in-phase component of an input signal which is in-phase and quadrature modulated. The demodulator includes a register storing a phase calibration value and a temperature sensor that performs a plurality of temperature sensings. A compensating stage generates for each temperature sensed a corresponding first sample on the basis of the difference between the sensed temperature and a calibration temperature and a compensation function indicative of a relationship existing between the phase of the input signal and the temperature. A combination stage generates a plurality of second samples, each second sample being a function of the phase calibration value and a corresponding first sample. A generating stage generates a demodulating signal having a phase which depends on the second samples and a demodulating stage demodulates the input signal by means of the demodulating signal.