公开(公告)号：US09522276B2

公开(公告)日：2016-12-20

申请号：US14603070

申请日：2015-01-22

Applicant: Medtronic, Inc.

Inventor： Xiaonan Shen ,  Nathan A Grenz ,  Robert D Musto ,  David L Palkert ,  Jonathan P Roberts ,  James D Reinke ,  Paul R Solheim

IPC: A61N1/00 ,  A61N1/365 ,  A61N1/37 ,  B81C1/00 ,  G01P15/00

CPC classification number: A61N1/36542 ,  A61N1/3706 ,  B81C1/00968 ,  G01P15/00

Abstract: A medical device and associated method determine a signal amplitude of a sensor signal produced by a MEMS sensor, compare the signal amplitude to a stiction detection condition, detect stiction of the MEMS sensor in response to the signal amplitude meeting the stiction detection condition, and automatically provide a corrective action in response to detecting the stiction.

Abstract translation: 医疗设备和相关方法确定由MEMS传感器产生的传感器信号的信号幅度，将信号幅度与静态检测条件进行比较，响应于满足粘性检测条件的信号幅度，自动检测MEMS传感器的静摩擦，并自动 提供纠正措施以响应检测到静脉。

公开(公告)号：US09079040B2

公开(公告)日：2015-07-14

申请号：US14473066

申请日：2014-08-29

Applicant: Medtronic, Inc.

Inventor： Matthew C Bond ,  Charles R Gordon ,  Weizheng Liang ,  James D Reinke ,  Jonathan P Roberts

IPC: A61N1/00 ,  A61N1/372 ,  A61N1/02 ,  A61N1/08 ,  G06F1/12 ,  G06F1/04

CPC classification number: A61N1/37264 ,  A61N1/025 ,  A61N1/08 ,  A61N1/372 ,  A61N1/37276 ,  G06F1/04 ,  G06F1/12

Abstract: Various techniques are described for periodically performing a calibration routine to calibrate a low-power system clock within an implantable medical device (IMD) based on a high accuracy reference clock also included in the IMD. The system clock is powered continuously, and the reference clock is only powered on during the calibration routine. The techniques include determining a clock error of the system clock based on a difference between frequencies of the system clock and the reference clock over a fixed number of clock cycles, and adjusting a trim value of the system clock to compensate for the clock error. Calibrating the system clock with a delta-sigma loop, for example, reduces the clock error over time. This allows accurate adjustment of the system clock to compensate for errors due to trim resolution, circuit noise and temperature.

Abstract translation: 描述了各种技术，用于周期性地执行校准例程以基于也包括在IMD中的高精度参考时钟校准可植入医疗设备（IMD）内的低功率系统时钟。 系统时钟连续供电，参考时钟仅在校准程序中打开电源。 这些技术包括基于系统时钟的频率和固定数量的时钟周期上的参考时钟之间的差异来确定系统时钟的时钟误差，以及调整系统时钟的修整值以补偿时钟误差。 例如，用delta-sigma循环校准系统时钟可以减少时间误差。 这允许系统时钟的精确调整，以补偿由于调整分辨率，电路噪声和温度引起的误差。