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    • 5. 发明授权
    • Voltage converter for implantable microstimulator using RF-powering coil
    • 使用RF供电线圈的可植入微型激励器的电压转换器
    • US07904171B2
    • 2011-03-08
    • US12099474
    • 2008-04-08
    • Jordi ParramonMatthew I Haller
    • Jordi ParramonMatthew I Haller
    • A61N1/00
    • A61N1/08A61N1/37205A61N1/3787
    • A combination, voltage converter circuit for use within an implantable device, such as a microstimulator, uses a coil, instead of capacitors, to provide a voltage step up and step down conversion functions. The output voltage is controlled, or adjusted, through duty-cycle modulation. In accordance with one aspect of the invention, applicable to implantable devices having an existing RF coil through which primary or charging power is provided, the existing RF coil is used in a time-multiplexing scheme to provide both the receipt of the RF signal and the voltage conversion function. This minimizes the number of components needed within the device, and thus allows the device to be packaged in a smaller housing or frees up additional space within an existing housing for other circuit components. In accordance with another aspect of the invention, the voltage up/down converter circuit is controlled by a pulse width modulation (PWM) low power control circuit. Such operation allows high efficiencies over a wide range of output voltages and current loads.
    • 在可植入装置(例如微型激励器)内使用的组合电压转换器电路使用线圈代替电容器来提供升压和降压转换功能。 通过占空比调制来控制或调节输出电压。 根据本发明的一个方面,可应用于具有通过其提供初级或充电功率的现有RF线圈的可植入装置,现有的RF线圈用于时间复用方案以提供RF信号的接收和 电压转换功能。 这使得器件中所需的部件的数量最小化,并因此允许将器件封装在较小的外壳中,或释放现有外壳内用于其他电路元件的额外空间。 根据本发明的另一方面,电压上/下变频器电路由脉宽调制(PWM)低功率控制电路控制。 这种操作允许在宽范围的输出电压和电流负载下实现高效率。