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1. 发明授权

US07539538B2 Low power loss current digital-to-analog converter used in an implantable pulse generator 有权
标题翻译：用于可植入脉冲发生器的低功耗电流数模转换器
公开(公告)号：US07539538B2
公开(公告)日：2009-05-26
申请号：US11138632
申请日：2005-05-26
申请人： Jordi Parramon , Yuping He , Kiran Nimmagadda
发明人： Jordi Parramon , Yuping He , Kiran Nimmagadda
IPC分类号： A61N1/00
CPC分类号： A61N1/36071 , A61N1/025 , A61N1/36125 , A61N1/378
摘要： 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.
摘要翻译：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。

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