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    FAULT DETECTION OF A SYSTEM USING A TEST INPUT COMPRISING A LINEAR COMBINATION OF INPUTS OF THE SYSTEM
    1.
    发明申请
    FAULT DETECTION OF A SYSTEM USING A TEST INPUT COMPRISING A LINEAR COMBINATION OF INPUTS OF THE SYSTEM 审中-公开

    公开(公告)号：US20200096555A1

    公开(公告)日：2020-03-26

    申请号：US16138949

    申请日：2018-09-21

    Applicant: INVENSENSE, INC.

    Inventor： Omid Oliaei ,  Adolfo Giambastiani

    IPC: G01R31/28 ,  G01R31/3183 ,  G01P15/00 ,  G01C19/00

    Abstract: Facilitating fault detection of a system using a test input comprising a linear combination of inputs of the system is presented herein. A system can comprise a test signal component that generates, via a test procedure, a test input signal comprising a first linear combination of at least two input signals of the system, and applies the test input signal to the system during a phase of respective phases of the test procedure; and a fault detection component that detects a fault of the system based on a test output signal corresponding to the test input signal and a second linear combination of respective output signals of the system corresponding to the at least two input signals.

    Identification and compensation of MEMS accelerometer errors
    2.
    发明授权
    Identification and compensation of MEMS accelerometer errors 有权

    公开(公告)号：US10725068B2

    公开(公告)日：2020-07-28

    申请号：US15363522

    申请日：2016-11-29

    Applicant: InvenSense, Inc.

    Inventor： Giacomo Gafforelli ,  Luca Coronato ,  Adolfo Giambastiani ,  Federico Mazzarella ,  Massimiliano Musazzi ,  Michele Folz

    IPC: G01P21/00 ,  G01P15/125

    Abstract: A microelectromechanical (MEMS) accelerometer has a proof mass, a sense electrode, and an auxiliary electrode. The sense electrode is located relative to the proof mass such that a capacitance formed by the sense electrode and the proof mass changes in response to a linear acceleration along a sense axis of the accelerometer. The auxiliary electrode is located relative to the proof mass such that a capacitance formed by the auxiliary electrode and proof mass is static in response to the linear acceleration. A sense drive signal is applied at the sense electrode and an auxiliary drive signal is applied at the auxiliary electrode. The sense drive signal and the auxiliary drive signal have different frequencies. An error is identified based on a portion of a signal that is received from the accelerometer and that is responsive to the auxiliary drive signal. Compensation is performed at the accelerometer based on the identified error.

    SINGLE CIRCUIT FAULT DETECTION
    4.
    发明申请
    SINGLE CIRCUIT FAULT DETECTION 审中-公开

    公开(公告)号：US20180284188A1

    公开(公告)日：2018-10-04

    申请号：US15471539

    申请日：2017-03-28

    Applicant: INVENSENSE, INC.

    Inventor： Omid Oliaei ,  Adolfo Giambastiani

    IPC: G01R31/3183 ,  G06F11/25

    Abstract: A fault detection system on a circuit can detect a fault on the same circuit without using a duplicate circuit. A test signal can be generated based on an input signal, and the input signal and test signal can be sent through the circuit and the resulting signals can be compared to determine if any fault is present. In an embodiment, a function can be applied to bits of the input signal and bits of the test signal such that when the signals are compared after passing through the processing block that is to be tested, if the variation between the signals is above a predetermined amount, it can be determined that a fault has occurred. In other embodiments, a first function can be applied to the input signal, and a second function can be applied to the test signal, and the resulting outputs can be compared.

    MEMS sensor with compensation of residual voltage
    6.
    发明授权
    MEMS sensor with compensation of residual voltage 有权

    公开(公告)号：US12174215B2

    公开(公告)日：2024-12-24

    申请号：US17102116

    申请日：2020-11-23

    Applicant: INVENSENSE, INC.

    Inventor： Giacomo Gafforelli ,  Luca Coronato ,  Adolfo Giambastiani

    IPC: G01P21/00 ,  B81C1/00 ,  G01P15/08 ,  G01P15/125

    Abstract: A microelectromechanical (MEMS) sensor, such as an accelerometer, has one more proof masses that respond to movement of the sensor, the movement of which is measured based on a distance between the one or more proof masses and on one or more sense electrodes. The accelerometer also has a plurality of auxiliary electrodes and a signal generator configured to apply an auxiliary signal having a first harmonic frequency to the plurality of auxiliary electrodes. Circuitry receives a sensed signal from the plurality of sense electrodes and identifies a portion of the sensed signal having the first harmonic frequency. Based on this identified portion of the sensed signal, the circuitry determines whether a residual voltage is present on the one or more proof masses or on the one or more sense electrodes, and the circuitry modifies the operation of the accelerometer when the residual voltage is determined to be present in order to compensate for the residual voltage.

    MEMS sensor modulation and multiplexing
    7.
    发明授权
    MEMS sensor modulation and multiplexing 有权

    公开(公告)号：US11125580B1

    公开(公告)日：2021-09-21

    申请号：US16874418

    申请日：2020-05-14

    Applicant: INVENSENSE, INC.

    Inventor： Vito Avantaggiati ,  Adolfo Giambastiani

    IPC: G01C19/5712 ,  G01C25/00

    Abstract: A MEMS inertial sensor may include drive electrodes that apply a drive signal to a suspended spring-mass system for measurement of an inertial linear or angular force and self-test electrodes that apply a self-test signal to the suspended spring-mass system for monitoring the characteristics of the suspended spring-mass system during operation. The self-test signal may be modulated by a spreading sequence that prevents interference with the self-test signal by vibrations and other disturbance signals. The self-test signals and drive signals may be modulated with CDMA code sequences to multiplex signals that are at least partially processed by a common sense path.

    Mems sensor with compensation of residual voltage
    8.
    发明申请
    Mems sensor with compensation of residual voltage 有权

    公开(公告)号：US20210102970A1

    公开(公告)日：2021-04-08

    申请号：US17102116

    申请日：2020-11-23

    Applicant: INVENSENSE, INC.

    Inventor： Giacomo Gafforelli ,  Luca Coronato ,  Adolfo Giambastiani

    IPC: G01P21/00 ,  B81C1/00 ,  G01P15/125

    Abstract: A microelectromechanical (MEMS) sensor, such as an accelerometer, has one more proof masses that respond to movement of the sensor, the movement of which is measured based on a distance between the one or more proof masses and on one or more sense electrodes. The accelerometer also has a plurality of auxiliary electrodes and a signal generator configured to apply an auxiliary signal having a first harmonic frequency to the plurality of auxiliary electrodes. Circuitry receives a sensed signal from the plurality of sense electrodes and identifies a portion of the sensed signal having the first harmonic frequency. Based on this identified portion of the sensed signal, the circuitry determines whether a residual voltage is present on the one or more proof masses or on the one or more sense electrodes, and the circuitry modifies the operation of the accelerometer when the residual voltage is determined to be present in order to compensate for the residual voltage.

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