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The Design of Low-power Wireless Neural Signal Acquisition Module
YUAN Xudong,ZHU Zhengfei
Electronic Science and Technology    2019, 32 (1): 16-20.   DOI: 10.16180/j.cnki.issn1007-7820.2019.01.004
Abstract   (335 HTML4 PDF(pc) (1331KB)(32)  

In this paper, RF radio frequency principle is used to design a pure analog low power wireless neural signal acquisition module suitable for small animals. Compared with digital-analog hybrid scheme, the pure analog implementation had the advantages of small size, low power consumption and simple structure. The acquisition module were divided into two parts including analog front-end amplification and wireless data transmission. With the use of low-power, low-noise instrumentation amplifier INA333 and OPA333 op amp analog front-end amplifier, a two-stage amplifier structure was formed and the power consumption and size of the circuit was reduced. The feedback enhancement effect achieved by adding a feedback inductor reduced the power consumption of the Colpitts oscillator. The FM modulation of the oscillator used the inter-polar capacitance of the transistor to form a pure analog wireless data transmission circuit, so that the acquisition module had the advantages of small size, low power consumption and wireless data transmission features. Circuit simulation and experimental test results both showed that the module could complete the wireless acquisition of animal neural signals and had a certain practicality.


Figure 1. Low power wireless neural signal acquisition module design block diagram
Extracts from the Article
本文提出的适用于小体型动物的低功耗无线神经信号采集模块设计方案的系统框图如图1所示,整个模块可分为模拟前端放大和无线数据传输两部分。
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