公开(公告)号：US20220412739A1

公开(公告)日：2022-12-29

申请号：US17847003

申请日：2022-06-22

Applicant: STMicroelectronics S.r.l.

Inventor： Andrea DONADEL ,  Emanuele LAVELLI ,  Stefano POLESEL

IPC: G01C19/5726 ,  G01C19/5755 ,  H03M3/00

Abstract: A driving circuit for controlling a MEMS oscillator includes a digital conversion stage to acquire a differential sensing signal indicative of a displacement of a movable mass of the MEMS oscillator, and to convert the differential sensing signal of analog type into a digital differential signal of digital type. Processing circuitry is configured to generate a digital control signal of digital type as a function of the comparison between the digital differential signal and a differential reference signal indicative of a target amplitude of oscillation of the movable mass which causes the resonance of the MEMS oscillator. An analog conversion stage includes a ΣΔ DAC and is configured to convert the digital control signal into a PDM control signal of analog type. A filtering stage of low-pass type, by filtering the PDM control signal, generates a control signal for controlling the amplitude of oscillation of the movable mass.

公开(公告)号：US20180003504A1

公开(公告)日：2018-01-04

申请号：US15707707

申请日：2017-09-18

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Andrea DONADEL ,  Davide MAGNONI ,  Marco GARBARINO

IPC: G01C19/5776 ,  G01C19/5726

CPC classification number: G01C19/5776 ,  G01C19/5726

Abstract: A gyroscope includes: a mass, which is movable with respect to a supporting body; a driving loop for keeping the mass in oscillation according to a driving axis; a reading device, which supplying an output signal indicating an angular speed of the body; and a compensation device, for attenuating spurious signal components in quadrature with respect to a velocity of oscillation of the mass. The reading device includes an amplifier, which supplies a transduction signal indicating a position of the mass according to a sensing axis. The compensation device forms a control loop with the amplifier, extracts from the transduction signal an error signal representing quadrature components in the transduction signal, and supplies to the amplifier a compensation signal such as to attenuate the error signal.

公开(公告)号：US20220080979A1

公开(公告)日：2022-03-17

申请号：US17470962

申请日：2021-09-09

Applicant: STMICROELECTRONICS S.r.l. ,  STMICROELECTRONICS, INC. ,  STMicroelectronics (Grand Ouest) SAS

Inventor： Nicola Matteo PALELLA ,  Leonardo COLOMBO ,  Andrea DONADEL ,  Roberto MURA ,  Mahaveer JAIN ,  Joëlle PHILIPPE

IPC: B60W40/101 ,  B60W40/11 ,  B60W40/112 ,  B60W40/114 ,  G01S19/47

Abstract: A system includes inertial sensors and a GPS. The system generates a first estimated vehicle velocity based on motion data and positioning data, generates a second estimated vehicle velocity based on the processed motion data and the first estimated vehicle velocity, and generates fused datasets indicative of position, velocity and attitude of a vehicle based on the processed motion data, the positioning data and the second estimated vehicle velocity. The generating the second estimated vehicle velocity includes: filtering the motion data, transforming the filtered motion data in a frequency domain based on the first estimated vehicle velocity, generating spectral power density signals, generating an estimated wheel angular frequency and an estimated wheel size based on the spectral power density signals, and generating the second estimated vehicle velocity as a function of the estimated wheel angular frequency and the estimated wheel size.

公开(公告)号：US20240067184A1

公开(公告)日：2024-02-29

申请号：US18496124

申请日：2023-10-27

Applicant: STMICROELECTRONICS S.r.l. ,  STMICROELECTRONICS, INC. ,  STMicroelectronics (Grand Ouest) SAS

Inventor： Nicola Matteo PALELLA ,  Leonardo COLOMBO ,  Andrea DONADEL ,  Roberto MURA ,  Mahaveer JAIN ,  Joelle PHILIPPE

IPC: B60W40/101 ,  B60W40/11 ,  B60W40/112 ,  B60W40/114 ,  G01S19/47

CPC classification number: B60W40/101 ,  B60W40/11 ,  B60W40/112 ,  B60W40/114 ,  G01S19/47 ,  B60W2520/28

Abstract: A system includes inertial sensors and a GPS. The system generates a first estimated vehicle velocity based on motion data and positioning data, generates a second estimated vehicle velocity based on the processed motion data and the first estimated vehicle velocity, and generates fused datasets indicative of position, velocity and attitude of a vehicle based on the processed motion data, the positioning data and the second estimated vehicle velocity. The generating the second estimated vehicle velocity includes: filtering the motion data, transforming the filtered motion data in a frequency domain based on the first estimated vehicle velocity, generating spectral power density signals, generating an estimated wheel angular frequency and an estimated wheel size based on the spectral power density signals, and generating the second estimated vehicle velocity as a function of the estimated wheel angular frequency and the estimated wheel size.

公开(公告)号：US20220412738A1

公开(公告)日：2022-12-29

申请号：US17847000

申请日：2022-06-22

Applicant: STMicroelectronics S.r.l.

Inventor： Andrea DONADEL ,  Emanuele LAVELLI ,  Stefano POLESEL

IPC: G01C19/5712

Abstract: A microelectromechanical gyroscope includes a support structure, a driving mass movable according to a driving axis; and an oscillating microelectromechanical loop. The microelectromechanical loop has a resonance frequency and a loop gain and includes the driving mass, a sensing interface that senses a position of the driving mass, and a gain control stage that maintains a modulus of the loop gain at a unitary value at the resonance frequency. The gain control stage includes a sampler and an transconductance operational amplifier in an open-loop configuration. The sampler acquires samples of a loop signal from the sensing interface in a first operative condition and transfers them to the transconductance operational amplifier in a second operative condition. The sampler decouples the transconductance operational amplifier from the sensing interface in the first operative condition and in the second operative condition.