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    Digitally timed CMOS rectifier for wireless power transfer
    22.
    发明授权
    Digitally timed CMOS rectifier for wireless power transfer 有权

    公开(公告)号：US11239698B1

    公开(公告)日：2022-02-01

    申请号：US17087685

    申请日：2020-11-03

    Applicant: Medtronic, Inc.

    Inventor： Jacob A. Roe ,  Joel B. Artmann ,  Jonathan P. Roberts ,  David J. Peichel

    IPC: H02J50/10 ,  H02J50/80 ,  H02M7/219 ,  A61M60/871 ,  A61M60/148

    Abstract: A digitally timed complementary metal oxide semiconductor (CMOS) rectifier for wireless power transfer in an implanted medical device is provided. According to one aspect, a voltage rectification circuit for a medical device having an internal coil and internal circuitry includes a voltage rectifier comprising a complementary metal oxide semiconductor (CMOS) circuit having low-side first type MOS transistors and upper cross-coupled second type MOS transistors. The voltage rectifier may be configured to output a rectified received voltage, each low-side first type MOS transistor being configured with an first type MOS body diode, the low-side first type MOS transistors being enabled by a timing signal to provide conduction through the low-side first type MOS transistors while bypassing conduction through the first type MOS body diode during a time window having a duration determined by voltage level crossings of the received voltage.

    Tissue conduction communication using ramped drive signal
    24.
    发明授权
    Tissue conduction communication using ramped drive signal 有权

    公开(公告)号：US11045654B2

    公开(公告)日：2021-06-29

    申请号：US16204172

    申请日：2018-11-29

    Applicant: Medtronic, Inc.

    Inventor： David J. Peichel ,  Jonathan P. Roberts ,  James D. Reinke ,  Michael B. Terry

    IPC: A61N1/372 ,  A61N1/375 ,  A61N1/39 ,  A61N1/05

    Abstract: A device, such as an IMD, having a tissue conductance communication (TCC) transmitter controls a drive signal circuit and a polarity switching circuit by a controller of the TCC transmitter to generate an alternating current (AC) ramp on signal having a peak amplitude that is stepped up from a starting peak-to-peak amplitude to an ending peak-to-peak amplitude according to a step increment and step up interval. The TCC transmitter is further controlled to transmit the AC ramp on signal from the drive signal circuit and the polarity switching circuit via a coupling capacitor coupled to a transmitting electrode vector coupleable to the IMD. After the AC ramp on signal, the TCC transmitter transmits at least one TCC signal to a receiving device.

    LOW-POWER SYSTEM CLOCK CALIBRATION BASED ON A HIGH-ACCURACY REFERENCE CLOCK
    25.
    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：US20140371818A1

    公开(公告)日：2014-12-18

    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: A61N1/372 ,  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。

    Method for power monitoring and dynamically managing power in a fully implanted LVAD system
    27.
    发明授权
    Method for power monitoring and dynamically managing power in a fully implanted LVAD system 有权

    公开(公告)号：US12023480B2

    公开(公告)日：2024-07-02

    申请号：US17130197

    申请日：2020-12-22

    Applicant: Medtronic, Inc.

    Inventor： Joel B. Artmann ,  Jacob A. Roe ,  Jonathan P. Roberts ,  David J. Peichel

    IPC: A61M60/876 ,  A61M60/508

    CPC classification number: A61M60/876 ,  A61M60/508

    Abstract: In an implanted medical device system, an internal controller, external power transmitter and methods for monitoring and dynamically managing power in an implanted medical device system are disclosed. According to one aspect, an internal controller is configured to provide power to a motor of an implanted medical device, the power being drawn from at least one of an internal battery and an internal coil, the at least one of the internal battery and the internal coil providing a supplied voltage. The internal controller includes processing circuitry configured to switch to one of the internal battery, the internal coil and a combination of the internal battery and the internal coil, based on a comparison of the supplied voltage to a threshold.

    TEMPERATURE SENSING OF IMPLANTED WIRELESS RECHARGE COIL
    30.
    发明申请
    TEMPERATURE SENSING OF IMPLANTED WIRELESS RECHARGE COIL 有权

    公开(公告)号：US20220212018A1

    公开(公告)日：2022-07-07

    申请号：US17140655

    申请日：2021-01-04

    Applicant: Medtronic, Inc.

    Inventor： David J. Peichel ,  Pankti N. Shah ,  Joel B. Artmann ,  Jonathan P. Roberts

    IPC: A61N1/372 ,  A61N1/378 ,  H02J50/80 ,  G08C17/02

    Abstract: The present disclosure provides a transcutaneous energy transfer system (TETS), having an implantable receiving coil in communication with an implantable controller and a hermetically sealed package encased by the implantable receiving coil. The hermetically sealed package including a plurality of tuning capacitors, at least one temperature sensor, scavenging circuitry configured to scavenge power from the plurality of tuning capacitors, and a temperature measuring circuit in communication with the at least one temperature sensor and the scavenging circuitry. The at least one temperature sensor being configured to measure a temperature of the hermetically sealed package and the temperature measuring circuit being configured to transmit the measured temperature to the implantable controller.

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