专用于人工耳蜗的可编程电流源

First International Symposium on Control, Communications and Signal Processing, 2004. Pub Date : 2004-09-27 DOI:10.1109/ISCCSP.2004.1296272

M. Ghorbel, A. Hamida, M. Samet

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引用次数: 6

摘要

本文提出了一种基于小型化数模转换器(DAC)的可编程电流源结构。这种新设计将专门用于人工耳蜗电路。在这项研究中，我们的主要目标是寻找一种模型，尽可能地包括与植入物功能相关的几个标准，如可靠性、灵活性、能源效率和集成区域。因此，这个6位DAC架构是为了满足可编程电流源而设计的。我们的设计能够通过1K/spl ω /负载产生2mA的最大电流，这是典型的神经阻抗。仿真结果表明，线性度好，功耗低，占地面积小。采用0.35/spl mu/m CMOS工艺，利用PSPICE工具对所得电路进行仿真。

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Programmable current source dedicated to a cochlear implant

In this paper, a novel architecture of a programmable current-source based on miniaturized digital-to-analog converters (DAC) was proposed. Such new design would be dedicated to cochlear implant circuit. In this study, our main objective was to look for one model that could include, as close as possible, several criteria related to the implant functionality such as reliability, flexibility, energy efficiency and integration area. Hence, this 6-bit DAC architecture was conceived in order to be adequate for a programmable current-source. Our design was able to generate a 2mA maximum current through a 1K/spl Omega/ load, which is around the typical nerve impedance. Simulation results showed good linearity, low power consumption and a low area occupation. Resulting circuit was simulated by PSPICE tool using the 0.35/spl mu/m CMOS technology.

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First International Symposium on Control, Communications and Signal Processing, 2004.

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