具有高输入阻抗的紧凑型神经放大器

2015 IEEE Advanced Information Technology, Electronic and Automation Control Conference (IAEAC) Pub Date : 2015-12-01 DOI:10.1109/IAEAC.2015.7428554

Jialin Liu, Xu Zhang, Bin Li, Ming Liu, Hongda Chen

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引用次数: 1

摘要

在本文中，我们提出了一种新的紧凑型、高输入阻抗的神经信号采集放大器。在本设计中，电流反馈是在一个改进的全差分折叠级联放大器中实现的，以隔离输入信号与反馈连接，从而增加前置放大器的输入阻抗。采用这种结构消除了共模反馈电路和笨重的电容器。具有可配置低频滚降的带通滤波器连接到前置放大器以进一步调节信号。整个设计实现了高阻抗、紧凑、低功耗、低噪声的优点。文中给出了仿真结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A compact neural amplifier with high input impedance

In this paper, we present a new compact, high-input-impedance amplifier for neural signal acquisition. In this design, current feedback is achieved in a modified fully differential folded cascode amplifier to isolate the input signal from the feedback connection and thus increase the input impedance of the preamplifier. Common mode feedback circuits and ponderous capacitors are eliminated by using this structure. A band-pass filter with configurable low-frequency roll-off is connected to the preamplifier to further condition the signal. The whole design achieves the merits of high impedance, compact, low power and low noise. Simulation results are provided in this paper.

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2015 IEEE Advanced Information Technology, Electronic and Automation Control Conference (IAEAC)

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