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    • 71. 发明申请
    • Selectable Boost Converter and Charge Pump for Compliance Voltage Generation in an Implantable Stimulator Device
    • 可选择的升压转换器和电荷泵,用于在植入式刺激器装置中实现合规电压产生
    • US20100211132A1
    • 2010-08-19
    • US12372501
    • 2009-02-17
    • Kiran NimmagaddaMd. Mizanur RahmanJordi Parramon
    • Kiran NimmagaddaMd. Mizanur RahmanJordi Parramon
    • A61N1/08
    • A61N1/3782A61N1/37211A61N1/378H02M3/07H02M3/156H02M2001/009
    • Improved compliance voltage generation circuitry for a medical device is disclosed. The improved circuitry in one embodiment comprises a boost converter and a charge pump, either of which is capable of generating an appropriate compliance voltage from the voltage of the battery in the device. A telemetry enable signal indicating whether the implant's transmitter, receiver, or both, have been enabled is received. A “boost” signal from compliance voltage monitor-and-adjust logic circuitry is processed with the telemetry enable signal and its inverse to selectively enable either the charge pump or the boost converter: if the telemetry enable signal is not active, the boost converter is used to generate the compliance voltage; if the telemetry enable signal is active, the charge pump is used. Because the charge pump circuitry does not produce a magnetic field, the charge pump will not interfere with magnetically-coupled telemetry between the implant and an external controller. By contrast, the boost converter is allowed to operate during periods of no telemetry, when magnetic interference is not a concern, while obtaining the advantage of higher power efficiency.
    • 公开了用于医​​疗装置的改进的顺应性电压产生电路。 一个实施例中的改进的电路包括升压转换器和电荷泵,其中任何一个能够从装置中的电池的电压产生适当的顺应性电压。 接收到指示植入物的发射器,接收器或两者是否被使能的遥测使能信号。 来自合规电压监控调节逻辑电路的“升压”信号通过遥测使能信号进行处理,其反相选择使能电荷泵或升压转换器:如果遥测使能信号无效,升压转换器 用于产生合规电压; 如果遥测使能信号有效,则使用电荷泵。 由于电荷泵电路不产生磁场,电荷泵不会干扰植入物和外部控制器之间的磁耦合遥测。 相比之下,在没有遥测的时期,升压转换器在磁干扰不受关注的同时获得了较高功率效率的优势,允许运行。
    • 76. 发明申请
    • Cascaded step-up converter and charge pump for efficient compliance voltage generation in an implantable stimulator device
    • 级联升压转换器和电荷泵,用于在可植入的刺激器装置中产生有效的符合电压
    • US20070097719A1
    • 2007-05-03
    • US11266646
    • 2005-11-03
    • Jordi ParramonGoran Marnfeldt
    • Jordi ParramonGoran Marnfeldt
    • H02J1/10
    • H02M3/07A61N1/37205A61N1/378A61N1/3787H02M3/155H02M2001/007
    • Disclosed herein are circuits and methods for generating a compliance voltage from a battery voltage in an implantable stimulator device. In one embodiment, the battery voltage is boosted to form the compliance voltage for driving the current sources (DACs) that provide therapeutic current to the electrodes on the device. Such improved boosting circuitry is preferably cascaded and comprises two stages. The first stage is preferably a step-up converter, which is used to generate an intermediate voltage from the battery voltage. The second stage is preferably a charge pump, which is used to generate the compliance voltage from the intermediate voltage. By splitting the boosting into stages, power efficiency during generation of high voltages is improved compared to the use of step-up converters and resolution in setting the compliance voltage is improved compared to the use of charge pumps alone. Moreover, depending on the compliance voltage to be produced by the boosting circuitry, the various stages can be selectively activated.
    • 本文公开了用于在可植入刺激器装置中从电池电压产生顺应性电压的电路和方法。 在一个实施例中,升高电池电压以形成用于驱动向装置上的电极提供治疗电流的电流源(DAC)的顺应性电压。 这种改进的升压电路优选地级联并且包括两个阶段。 第一级优选是升压转换器,其用于从电池电压产生中间电压。 第二阶段优选为电荷泵,其用于从中间电压产生顺应性电压。 通过将升压分为阶段,与使用升压转换器相比,在产生高电压期间的功率效率得到改善,与单独使用电荷泵相比,提高了顺应性电压的分辨率得到改善。 此外,根据由升压电路产生的顺应性电压,可以选择性地激活各个级。
    • 77. 发明申请
    • Low power loss current digital-to-analog converter used in an implantable pulse generator
    • 用于可植入脉冲发生器的低功耗电流数模转换器
    • US20050267546A1
    • 2005-12-01
    • US11138632
    • 2005-05-26
    • Jordi ParramonYuping HeKiran Nimmagadda
    • Jordi ParramonYuping HeKiran Nimmagadda
    • A61N1/18A61N1/36
    • A61N1/36071A61N1/025A61N1/36125A61N1/378
    • In one embodiment, the present invention provides an implantable stimulation device that includes output current sources and/or sinks configured to provide an output current for a load (i.e., tissue). The output path of the output current source or sink comprises a transistor which operates in a linear mode instead of a saturation mode. Because operation in a linear mode results in smaller drain-to-source voltage drops, power consumption in the output current source or sink (and hence in the implantable stimulator) is reduced, reducing battery or other power source requirements. Operation in the linear mode is facilitated in useful embodiments by a load in an input path (into which a reference current is sent) and a load in the output path (which bears the output current). The loads can be active transistors or passive resistors. A feedback circuit (e.g., an operational amplifier) receives voltages that build up across these loads, and sends a control signal to the gate of the transistor to ensure its linear operation.
    • 在一个实施例中,本发明提供了一种植入式刺激装置,其包括被配置为提供负载(即组织)的输出电流的输出电流源和/或接收器。 输出电流源或吸收器的输出路径包括以线性模式而不是饱和模式操作的晶体管。 因为在线性模式下的操作会导致较小的漏极 - 源极电压降,所以输出电流源或接收器(以及因此在可植入的刺激器中)的功耗降低,从而减少电池或其他电源要求。 在有用的实施例中,通过输入路径(发送参考电流)中的负载和输出路径(承担输出电流)中的负载来促进线性模式的操作。 负载可以是有源晶体管或无源电阻。 反馈电路(例如,运算放大器)接收跨越这些负载的电压,并将控制信号发送到晶体管的栅极,以确保其线性运行。