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    LOW-POWER SYSTEM CLOCK CALIBRATION BASED ON A HIGH- ACCURACY REFERENCE CLOCK
    1.
    发明申请
    LOW-POWER SYSTEM CLOCK CALIBRATION BASED ON A HIGH- ACCURACY REFERENCE CLOCK 有权
    基于高精度参考时钟的低功率系统时钟校准

    公开(公告)号：US20120109259A1

    公开(公告)日：2012-05-03

    申请号：US12915832

    申请日：2010-10-29

    申请人： Matthew Bond ,  Charles R. Gordon ,  Weizheng Liang ,  James D. Reinke ,  Jonathan P. Roberts

    发明人： Matthew Bond ,  Charles R. Gordon ,  Weizheng Liang ,  James D. Reinke ,  Jonathan P. Roberts

    IPC分类号： A61N1/08 ,  H03L7/00

    CPC分类号： A61N1/37264 ,  A61N1/025 ,  A61N1/08 ,  A61N1/372 ,  A61N1/37276 ,  G06F1/04 ,  G06F1/12

    摘要： 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.

    摘要翻译： 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。

    Low-power system clock calibration based on a high-accuracy reference clock
    2.
    发明授权
    Low-power system clock calibration based on a high-accuracy reference clock 有权
    基于高精度参考时钟的低功耗系统时钟校准

    公开(公告)号：US08825170B2

    公开(公告)日：2014-09-02

    申请号：US12915832

    申请日：2010-10-29

    申请人： Matthew Bond ,  Charles R. Gordon ,  Weizheng Liang ,  James D. Reinke ,  Jonathan P. Roberts

    发明人： Matthew Bond ,  Charles R. Gordon ,  Weizheng Liang ,  James D. Reinke ,  Jonathan P. Roberts

    IPC分类号： A61N1/00 ,  A61N1/08 ,  A61N1/02 ,  G06F1/12 ,  A61N1/372

    CPC分类号： A61N1/37264 ,  A61N1/025 ,  A61N1/08 ,  A61N1/372 ,  A61N1/37276 ,  G06F1/04 ,  G06F1/12

    摘要： 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.

    摘要翻译： 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。

    ELECTRODE SHAPES AND POSITIONS FOR REDUCING LOSS OF CONTACT IN AN IMPLANTABLE ECG RECORDER
    5.
    发明申请
    ELECTRODE SHAPES AND POSITIONS FOR REDUCING LOSS OF CONTACT IN AN IMPLANTABLE ECG RECORDER 审中-公开
    电极形状和位置，用于减少可移植ECG记录仪中的接触损失

    公开(公告)号：US20120108993A1

    公开(公告)日：2012-05-03

    申请号：US13282167

    申请日：2011-10-26

    申请人： Charles R. Gordon ,  Brian B. Lee ,  Michael W. Barror

    发明人： Charles R. Gordon ,  Brian B. Lee ,  Michael W. Barror

    IPC分类号： A61B5/042

    CPC分类号： A61B5/0422 ,  A61B5/0006 ,  A61B5/076 ,  A61B5/6861 ,  A61B2560/0406

    摘要： An improved design for subcutaneous monitors that addresses the problem caused by bubbles of air may remain in the pocket in which the device is implanted. As implantable monitors and their associated electrodes are reduced in size, these bubbles may in some cases cover one or both electrodes, interfering with sensing of the ECG signal. The invention addresses this problem by configuring the electrodes to increase the pressure of the electrodes against the tissue above the electrodes relative to the pressures exerted by the adjacent outer facing surfaces of the device.

    摘要翻译： 用于解决由空气气泡引起的问题的皮下监测器的改进设计可以保留在装置植入的口袋中。 随着植入式监护仪及其相关电极的尺寸减小，这些气泡在某些情况下可能会覆盖一个或两个电极，从而干扰ECG信号的感测。 本发明通过配置电极来相对于由相邻的面向外部的表面施加的压力来配置电极以增加电极对电极上方的组织的压力来解决这个问题。