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密集的,11V耐受,平衡的刺激器IC与数字时间域校准100nA错误
IEEE transactions on biomedical circuits and systems
|June 19, 2023
概括
本研究介绍了神经刺激器的数字时间域校准 (DTDC),提高了安全性和整合性. 这种新的电荷平衡技术尽量减少了先进的神经假肢的电极-组织接口问题.
科学领域:
- 生物医学工程 生物医学工程
- 集成电路设计 集成电路设计
- 神经科学是一个神经科学.
背景情况:
- 安全的神经刺激需要精确的电荷平衡,以防止电极-组织接口损伤.
- 现有的方法往往损害了整合和区域效率.
- 高分辨率的神经假体需要与高阻抗微电极阵列兼容.
研究的目的:
- 介绍一个具有新数字时间域校准 (DTDC) 技术的多通道神经刺激器.
- 通过先进的电荷平衡来实现最大的集成和安全的神经刺激.
- 为了减少电路匹配约束并节省通道面积.
主要方法:
- 数字时间域校准 (DTDC) 通过数字调整双相刺激脉冲.
- 使用芯片上的ADC对刺激器通道进行一次性表征.
- 一个16通道的神经刺激器在65纳米CMOS技术中实现.
主要成果:
- 在校准后,DTDC技术成功地将所有通道的直流误差降低到96 nA以下.
- 实现了10.4V的合规性,使其与高阻抗微电极阵列兼容.
- 实现了一个16通道刺激器,最小面积为0.0141 mm2/通道.
结论:
- DTDC为安全和高度集成的神经刺激器提供了可行的解决方案.
- 实现的芯片在低压过程中展示了优越的输出摆动.
- 这项工作推动了下一代神经假肢的发展.
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