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首页> 外文期刊>Biomedical Circuits and Systems, IEEE Transactions on >${rm A}~6~{mu{rm W}}$ per Channel Analog Biomimetic Cochlear Implant Processor Filterbank Architecture With Across Channels AGC
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${rm A}~6~{mu{rm W}}$ per Channel Analog Biomimetic Cochlear Implant Processor Filterbank Architecture With Across Channels AGC

机译：每通道模拟仿生耳蜗植入处理器滤波器组架构，每个通道 $ {rm A}〜6〜{mu {rm W}} $ 跨频道AGC

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摘要

A new analog cochlear implant processor filterbank architecture of increased biofidelity, enhanced across-channel contrast and very low power consumption has been designed and prototyped. Each channel implements a biomimetic, asymmetric bandpass-like One-Zero-Gammatone-Filter (OZGF) transfer function, using class-AB log-domain techniques. Each channel's quality factor and suppression are controlled by means of a new low power Automatic Gain Control (AGC) scheme which is coupled across the neighboring channels and emulates lateral inhibition (LI) phenomena in the auditory system. Detailed measurements from a five-channel silicon IC prototype fabricated in a AMS technology confirm the operation of the coupled AGC scheme and its ability to enhance contrast among channel outputs. The prototype is characterized by an input dynamic range of 92 dB while consuming only of power in total ( per channel) under a 1.8 V power supply. The architecture is well-suited for fully-implantable cochlear implants.
机译：已经设计出了一种新型的模拟耳蜗植入处理器滤波器组架构，该架构具有更高的生物保真度，增强的跨通道对比度和非常低的功耗。每个通道都使用AB类对数域技术实现仿生，不对称的类似带通的单零Gammatone滤波器（OZGF）传递函数。每个通道的质量因数和抑制均通过新的低功率自动增益控制（AGC）方案进行控制，该方案跨相邻通道耦合并模拟听觉系统中的横向抑制（LI）现象。使用AMS技术制造的五通道硅IC原型的详细测量结果证实了耦合AGC方案的操作及其增强通道输出之间对比度的能力。该原型的特点是输入动态范围为92 dB，而在1.8 V电源下仅消耗总功率（每个通道）。该体系结构非常适合完全植入的人工耳蜗。

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