公开(公告)号：US10228249B2

公开(公告)日：2019-03-12

申请号：US15282227

申请日：2016-09-30

Applicant: InvenSense, Inc.

Inventor： Derek Shaeffer ,  Stanley Wang

IPC: G01C19/00 ,  G01P3/44 ,  G01P15/08 ,  G01C19/10 ,  G01C19/5776 ,  H03G3/20 ,  H03L7/089 ,  H03L7/093 ,  H03L7/099 ,  G01C19/06

Abstract: A gyroscope system comprises a MEMS gyroscope coupled to a drive system and a sense system. The drive system maintains the MEMS gyroscope in a state of oscillation and the sense system for receiving, amplifying, and demodulating an output signal of the MEMS gyroscope that is indicative of the rate of rotation. The gyroscope system further includes a phase-locked look (PLL) which receives a reference clock (REFCLK) from the drive system and produces a system clock (CLK). Finally, the gyroscope system includes a controller operating on the system clock sets an operating state of the drive system and the sense system and also controls a state of the PLL. One or more system state variables are maintained in a substantially fixed state during a protect mode thereby enabling rapid transitions between a low-power mode and a normal operating mode of the gyroscope system.

公开(公告)号：US09506757B2

公开(公告)日：2016-11-29

申请号：US14088059

申请日：2013-11-22

Applicant: InvenSense, Inc.

Inventor： Derek Shaeffer ,  Stanley Wang

IPC: G01C19/54 ,  G01C19/5776 ,  G01C19/06

CPC classification number: G01C19/10 ,  G01C19/065 ,  G01C19/5776 ,  H03G3/20 ,  H03L7/0891 ,  H03L7/093 ,  H03L7/099 ,  Y10T74/1229

Abstract: A gyroscope system comprises a MEMS gyroscope coupled to a drive system and a sense system. The drive system maintains the MEMS gyroscope in a state of oscillation and the sense system for receiving, amplifying, and demodulating an output signal of the MEMS gyroscope that is indicative of the rate of rotation. The gyroscope system further includes a phase-locked look (PLL) which receives a reference clock (REFCLK) from the drive system and produces a system clock (CLK). Finally, the gyroscope system includes a controller operating on the system clock sets an operating state of the drive system and the sense system and also controls a state of the PLL. One or more system state variables are maintained in a substantially fixed state during a protect mode thereby enabling rapid transitions between a low-power mode and a normal operating mode of the gyroscope system.

Abstract translation: 陀螺仪系统包括耦合到驱动系统和感测系统的MEMS陀螺仪。 驱动系统将MEMS陀螺仪维持在振荡状态，以及用于接收，放大和解调表示旋转速率的MEMS陀螺仪的输出信号的感测系统。 陀螺仪系统还包括从驱动系统接收参考时钟（REFCLK）并产生系统时钟（CLK）的锁相外观（PLL）。 最后，陀螺仪系统包括在系统时钟上操作的控制器设置驱动系统和感测系统的操作状态，并且还控制PLL的状态。 在保护模式期间，一个或多个系统状态变量保持在基本上固定的状态，从而实现陀螺仪系统的低功率模式和正常操作模式之间的快速转换。

公开(公告)号：US10247555B2

公开(公告)日：2019-04-02

申请号：US15215759

申请日：2016-07-21

Applicant: InvenSense, Inc.

Inventor： Derek Shaeffer ,  Stanley Wang

IPC: G01C19/5776 ,  G01P1/04

Abstract: A round-robin sensing device is disclosed. The round-robin sensing device comprises a MEMS device, wherein the MEMS device includes first and second sense electrodes. The round-robin sensing device also comprises a multiplexer coupled to the first and second sense electrodes, at least one sense amplifier coupled to the multiplexer, a demodulator coupled to the at least one sense amplifier, and an integrate and dump circuit coupled to the demodulator. Finally, the round-robin sensing device comprises an analog-to-digital converter (ADC) coupled to the de-multiplexer, wherein the multiplexer, the at least one sense amplifier and the demodulator provide a continuous time sense path during amplification that is resettable and wherein the integrate and dump circuit and the ADC provide a discrete time processing path.

公开(公告)号：US09880063B2

公开(公告)日：2018-01-30

申请号：US14195736

申请日：2014-03-03

Applicant: InvenSense, Inc.

Inventor： Derek Shaeffer ,  Stanley Wang

IPC: G01L9/00 ,  G01L9/12

CPC classification number: G01L9/0072 ,  G01L9/12

Abstract: A pressure sensor is provided which produces a measurement of the displacement and a measurement of a natural frequency of the diaphragm which are then combined to produce a compensated measurement of the displacement of the diaphragm, thereby substantially eliminating the dependence of the compensated displacement measurement on strain.

公开(公告)号：US09459274B2

公开(公告)日：2016-10-04

申请号：US13958465

申请日：2013-08-02

Applicant: InvenSense, Inc.

Inventor： Derek Shaeffer ,  Stanley Wang

IPC: G01P1/04 ,  G01C19/5776

CPC classification number: G01C19/5776 ,  G01P1/04

Abstract: A round-robin sensing device is disclosed. The round-robin sensing device comprises a MEMS device, wherein the MEMS device includes first and second sense electrodes. The round-robin sensing device also comprises a multiplexer coupled to the first and second sense electrodes, at least one sense amplifier coupled to the multiplexer, a demodulator coupled to the at least one sense amplifier, and an integrate and dump circuit coupled to the demodulator. Finally, the round-robin sensing device comprises an analog-to-digital converter (ADC) coupled to the de-multiplexer, wherein the multiplexer, the at least one sense amplifier and the demodulator provide a continuous time sense path during amplification that is resettable and wherein the integrate and dump circuit and the ADC provide a discrete time processing path.

Abstract translation: 公开了一种循环感测装置。 循环感测装置包括MEMS装置，其中MEMS装置包括第一和第二感测电极。 循环感测装置还包括耦合到第一和第二感测电极的多路复用器，耦合到多路复用器的至少一个读出放大器，耦合到至少一个读出放大器的解调器以及耦合到解调器的积分和转储电路 。 最后，循环感测装置包括耦合到去多路复用器的模拟 - 数字转换器（ADC），其中多路复用器，至少一个读出放大器和解调器在放大期间提供可重置的连续时间感测路径 并且其中集成和转储电路和ADC提供离散的时间处理路径。