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首页> 外文期刊>Biomedical Engineering: Applications, Basis and Communications >Design and implementation of a multichannel preamplifier for intracortical activities recording using commercial components
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Design and implementation of a multichannel preamplifier for intracortical activities recording using commercial components

机译：用于使用商业组件进行皮质内活动记录的多通道前置放大器的设计和实现

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摘要

Simple and useful methods are described herein for a portable and multichannel preamplifier circuit. These procedures include mainly operational amplifier selection, offset voltage reduction, active guarding circuit, selectable reference node, and grounded plate arrangement. A six-channel preamplifier board is designed and fabricated for intracortical activities recording using commercial components. The preamplifier has been successfully tested in vivo to process cortically derived extracellular evoked potentials under anesthetized rat. Results from both simulated circuit testing and practical animal measuring indicate that a high-quality recording can be obtained by adopting the presented circuits. This method needs only ready-made materials, general know-how, and a few components and is simple even for a nonelectronic engineering researcher in-house. The proposed preamplifier can be easily expanded by combining other post-processing circuits or recording devices. This preamplifier can also be easily modified and applied to the analogy front-end (AFE) of telemetric recording system, other related electrophysiological or physiological studies.
机译：本文描述了用于便携式和多通道前置放大器电路的简单且有用的方法。这些程序主要包括运算放大器的选择，失调电压的降低，有源保护电路，可选的参考节点和接地板的布置。设计和制造了六通道前置放大器板，用于使用商业组件进行皮质内活动记录。前置放大器已经在体内成功进行了测试，可以在麻醉的大鼠下处理皮质衍生的细胞外诱发电位。模拟电路测试和实际动物测量的结果均表明，采用所介绍的电路可以获得高质量的记录。这种方法只需要现成的材料，一般知识和一些组件，即使对于内部的非电子工程研究人员来说也很简单。通过组合其他后处理电路或记录设备，可以轻松扩展建议的前置放大器。该前置放大器也可以轻松修改，并应用于遥测记录系统的模拟前端（AFE），其他相关的电生理或生理研究。

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