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1. 发明申请

WO2009042011A1 IMPLANTABLE MEDICAL DEVICE WITH LOW POWER DELTA-SIGMA ANALOG-TO-DIGITAL CONVERTER 审中-公开
标题翻译：具有低功耗DELTA-SIGMA模拟到数字转换器的可植入医疗设备
公开(公告)号：WO2009042011A1
公开(公告)日：2009-04-02
申请号：PCT/US2008/009034
申请日：2008-07-25
申请人： MEDTRONIC, INC. , TERRY, Michael, B. , HEINKS, Michael, W. , ANDERSON, Joel, A. , FRIGAARD, Mark, A.
发明人： TERRY, Michael, B. , HEINKS, Michael, W. , ANDERSON, Joel, A. , FRIGAARD, Mark, A.
IPC分类号： A61N1/37 , H03M3/02 , H03M3/04
CPC分类号： A61N1/3704 , H03M3/34 , H03M3/37 , H03M3/434
摘要： In general, this disclosure describes techniques for reducing power consumption within an implantable medical device (IMD). An IMD implanted within a patient may have finite power resources that are intended to last several years. To promote device longevity, sensing and therapy circuits of the IMD are designed to incorporate an analog-to-digital converter (ADC) that provides relatively high resolution output at a relatively low operation frequency, and does so with relatively low power consumption. An ADC designed in accordance with the techniques described herein utilizes a quantizer that has a lower resolution than a digital-to-analog converter (DAC) used for negative feedback. Such a configuration provides the benefits of higher resolution DAC feedback without having the use high oversampling ratios that result in high power consumption. Also, the techniques avoid the use of, and the associated high power consumption of, a high resolution flash ADC, within the sigma delta loop.
摘要翻译：通常，本公开描述了用于降低可植入医疗装置（IMD）内的功率消耗的技术。植入患者体内的IMD可能具有有限的功率资源，这些功率资源将持续数年。为了促进设备使用寿命，IMD的感测和治疗电路被设计为包含在相对低的操作频率下提供相对高分辨率输出的模数转换器（ADC），并且以相对较低的功耗来实现。根据本文描述的技术设计的ADC利用具有比用于负反馈的数模转换器（DAC）更低的分辨率的量化器。这种配置提供了更高分辨率DAC反馈的优点，而不需要使用导致高功耗的高过采样比。此外，该技术避免了在Σ-Δ环路内使用高分辨率闪存ADC的相关高耗能。

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