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公开(公告)号：US10451454B2
公开(公告)日：2019-10-22
申请号：US16184664
申请日：2018-11-08
Applicant: Analog Devices, Inc.
Inventor： Gaurav Vohra , William A. Clark , Mehrnaz Motiee
Abstract: Various embodiments mitigate the risk of frequency-lock in systems having multiple resonators by dynamically changing the frequency at which at least one of the resonators is driven. More particularly, the drive frequency of at least one of the resonators is changed often enough that the multiple resonators do not have time to achieve frequency lock. Changes in the oscillation of the resonators may be analyzed to determine, for example, acceleration of such systems. Some embodiments implement self-test by assessing expected performance of a system with toggling drive frequencies. More particularly, some embodiments implement self-test by artificially inducing displacement of a movable member of a system.
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Patent Agency Ranking
公开(公告)号：US20190257654A1
公开(公告)日：2019-08-22
申请号：US15900622
申请日：2018-02-20
Applicant: Analog Devices, Inc.
Inventor： Jiefeng Yan , William A. Clark
IPC: G01C19/5712 , G01C19/5776 , B81B7/00
Abstract: Sense amplifiers for use in connection with microelectromechanical system (MEMS) gyroscopes are described. The sense amplifiers may be configured to change the level of a gyroscope signal, i.e., the signal produced by a gyroscope in response to angular motion, to a level suitable for processing circuitry arranged to infer the angular velocity. The sense amplifier may further provide a DC discharge path allowing for discharge of the DC component of the output signal. The DC discharge path may include an anti-aliasing filter and a resistive circuit. The anti-aliasing filter may filter the output signal to maintain the resistive circuit in the linear region. The anti-aliasing filter may be designed with a frequency response such that discrete frequency sub-bands are blocked or at least attenuated. The frequency sub-bands may be tuned to substantially match the gyroscope's resonant frequency and its integer multiples.
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公开(公告)号：US10261105B2
公开(公告)日：2019-04-16
申请号：US15890835
申请日：2018-02-07
Applicant: Analog Devices, Inc.
Inventor： William A. Clark
IPC: G01P15/125 , G01P15/18 , G01P15/08
Abstract: A microelectromechanical system (MEMS) accelerometer is described. The MEMS accelerometer is arranged to limit distortions in the detection signal caused by displacement of the anchor(s) connecting the MEMS accelerometer to the underlying substrate. The MEMS accelerometer may include masses arranged to move in opposite directions in response to an acceleration of the MEMS accelerometer, and to move in the same direction in response to displacement of the anchor(s). The masses may, for example, be hingedly coupled to a beam in a teeter-totter configuration. Motion of the masses in response to acceleration and anchor displacement may be detected using capacitive sensors.
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公开(公告)号：US10168194B2
公开(公告)日：2019-01-01
申请号：US14998168
申请日：2015-12-24
Applicant: Analog Devices, Inc.
Inventor： Gaurav Vohra , William A. Clark , Mehrnaz Motiee
Abstract: Various embodiments mitigate the risk of frequency-lock in systems having multiple resonators by dynamically changing the frequency at which at least one of the resonators is driven. More particularly, the drive frequency of at least one of the resonators is changed often enough that the multiple resonators do not have time to achieve frequency lock. Changes in the oscillation of the resonators may be analyzed to determine, for example, acceleration of such systems. Some embodiments implement self-test by assessing expected performance of a system with toggling drive frequencies. More particularly, some embodiments implement self-test by artificially inducing displacement of a movable member of a system.
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公开(公告)号：US20170184644A1
公开(公告)日：2017-06-29
申请号：US14998168
申请日：2015-12-24
Applicant: Analog Devices, Inc.
Inventor： Gaurav Vohra , William A. Clark
IPC: G01R23/02
Abstract: Various embodiments mitigate the risk of frequency-lock in systems having multiple resonators by dynamically changing the frequency at which at least one of the resonators is driven. More particularly, the drive frequency of at least one of the resonators is changed often enough that the multiple resonators do not have time to achieve frequency lock. Changes in the oscillation of the resonators may be analyzed to determine, for example, acceleration of such systems. Some embodiments implement self-test by assessing expected performance of a system with toggling drive frequencies. More particularly, some embodiments implement self-test by artificially inducing displacement of a movable member of a system.
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公开(公告)号：US08555718B2
公开(公告)日：2013-10-15
申请号：US13775849
申请日：2013-02-25
Applicant: Analog Devices, Inc.
Inventor： Jinbo Kuang , William A. Clark , John A. Geen
CPC classification number: G01C19/56 , G01C19/5677 , G01P15/09 , Y10T29/42
Abstract: An inertial sensor includes driving piezoelectric transducers for enabling an oscillation of a resonator, sensing piezoelectric transducers for enabling a detection of a movement of the inertial sensor, and piezoelectric compensating elements substantially equidistantly among the driving and the sensing piezoelectric transducers, wherein the compensating elements and the resonator form corresponding capacitors having capacitive gaps, and wherein, during the oscillation of the resonator, changes in electrostatic charges stored in the capacitors are measured with the compensating elements and are modified so as to modify the oscillation of the resonator.
Abstract translation: 惯性传感器包括驱动压电换能器，用于实现谐振器的振荡，感测压电换能器，以便能够检测惯性传感器的运动，以及压电补偿元件在驱动和感测压电换能器之间基本上等距离，其中补偿元件和 谐振器形成具有电容间隙的相应的电容器，并且其中，在谐振器的振荡期间，用补偿元件测量存储在电容器中的静电电荷的变化，并且被修改以便改变谐振器的振荡。
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