TECHNIQUES FOR REDUCED NOISE CAPACITANCE-TO-VOLTAGE CONVERTER

    公开(公告)号:US20240171188A1

    公开(公告)日:2024-05-23

    申请号:US18500886

    申请日:2023-11-02

    申请人: INVENSENSE, INC.

    摘要: A continuous time single drive capacitance-to-voltage (C2V) converter can be employed for single sensor, balanced single sensor, or differential sensor. First sensor and/or second sensor can be employed to sense a condition. A capacitive bridge can comprise a first capacitive digital-to-analog-converter (DAC) and second capacitive DAC as a differential node. First capacitive DAC can be associated with first sensor, and second capacitive DAC can be associated with a third capacitive DAC, in series with first sensor, if single sensor is implemented or the second sensor if balanced single sensor or differential sensor is implemented. Capacitive bridge can be connected to differential input of a capacitive feedback amplifier that can be a continuous time amplifier with no signal sampling and no noise folding. Capacitive feedback amplifier can comprise capacitively coupled input common mode feedback, which can remove noise from a sensor drive, and output common mode feedback.

    Incremental analog to digital converter incorporating noise shaping and residual error quantization

    公开(公告)号:US11990917B2

    公开(公告)日:2024-05-21

    申请号:US17805761

    申请日:2022-06-07

    申请人: INVENSENSE, INC.

    摘要: The present invention relates to an incremental analog to digital converter incorporating noise shaping and residual error quantization. In one embodiment, a circuit includes an incremental analog to digital converter, comprising a loop filter that filters an analog input signal in response to receiving a reset signal, resulting in a filtered analog input signal, and a successive approximation register (SAR) quantizer, coupled with the filtered analog input signal, that converts the filtered analog input signal to an intermediate digitized output of a first resolution based on a reference voltage, wherein the SAR quantizer comprises a feedback loop that shapes quantization noise generated by the SAR quantizer as a result of converting the filtered analog input signal; and a digital filter, coupled with the intermediate digitized output, that generates a digitized output signal of a second resolution, greater than the first resolution, by digitally filtering the intermediate digitized output.

    LOW STRESS OVERTRAVEL STOP
    7.
    发明公开

    公开(公告)号:US20240069061A1

    公开(公告)日:2024-02-29

    申请号:US18502444

    申请日:2023-11-06

    申请人: INVENSENSE, INC.

    IPC分类号: G01P15/08

    CPC分类号: G01P15/08 G01P2015/0871

    摘要: A microelectromechanical system device is described. The microelectromechanical system device can comprise: a proof mass coupled to an anchor via a spring, wherein the proof mass moves in response to an imposition of an external load to the proof mass, and an overtravel stop comprising a first portion and a second portion.

    Drive and sense balanced, fully-coupled 3-axis gyroscope

    公开(公告)号:US11841228B2

    公开(公告)日:2023-12-12

    申请号:US17467145

    申请日:2021-09-03

    申请人: INVENSENSE, INC.

    IPC分类号: G01C19/5712 G01C19/5783

    CPC分类号: G01C19/5712 G01C19/5783

    摘要: The subject disclosure provides exemplary 3-axis (e.g., GX, GY, and GZ) linear and angular momentum balanced vibratory rate gyroscope architectures with fully-coupled sense modes. Embodiments can employ balanced drive and/or balanced sense components to reduce induced vibrations and/or part to part coupling. Embodiments can comprise two inner frame gyroscopes for GY sense mode and an outer frame or saddle gyroscope for GX sense mode and drive system coupling, drive shuttles coupled to the two inner frame gyroscopes or outer frame gyroscope, and four GZ proof masses coupled to the inner frame gyroscopes for GZ sense mode. Components can be removed from an exemplary overall architecture to fabricate a single axis or two axis gyroscope and/or can be configured such that a number of proof-masses can be reduced in half from an exemplary overall architecture to fabricate a half-gyroscope. Other embodiments can employ a stress isolation frame to reduce package induced stress.