2.4G-2.5GHz神经信号检测与无线传输集成系统设计

需积分: 9 44 浏览量更新于2024-08-26 收藏 256KB PDF 举报

本文介绍了一种全新的完整神经信号检测与无线传输集成系统，由低噪声运算放大器（LNA）、高精度模拟数字转换器（ADC）、射频发射器和射频接收器组成。该系统的设计目标是满足神经信号检测对高输入阻抗和低噪声的需求，同时考虑到无线通信标准，如IEEE 802.15，以确保信号传输的可靠性和效率。系统的核心部分包括： 1. 低噪声运算放大器 (LNA)：作为前端传感器的接口，LNA负责放大微弱的神经电信号，降低外部噪声的影响，确保信号的清晰度和完整性。 2. 高精度模拟数字转换器 (ADC)：将经过处理的模拟信号转换为数字信号，这一步骤对于后续信号分析和处理至关重要，需要具有高分辨率和采样速率，以便捕捉到神经信号的微妙变化。 3. 射频电路设计：基于IEEE 802.15标准，这些电路实现了信号的无线传输。标准化的设计保证了兼容性和广泛的可用性，尤其是在2.4 GHz至2.5 GHz的频段，这是无线个人局域网（Wi-Fi）和蓝牙等常用技术的频率范围。 4. 集成芯片设计：该系统采用0.18微米CMOS工艺制造，实现高度集成，芯片面积仅为2.88平方毫米，显示出小型化和高效能的特点。这样的设计对于构建无线神经信号处理器来说是一个理想的解决方案。 5. 应用领域：这项研究对于生物医学和临床应用具有重要意义，因为它允许实时、非侵入式地监测和传输大脑活动，对神经科学、康复治疗以及可能的脑机接口（BMI）等领域有潜在的巨大贡献。这篇研究论文提供了一个创新的框架，展示了如何通过集成不同的电子元件来构建一个高效、低功耗的神经信号检测和无线传输系统，这对于理解和利用神经信号的研究以及未来无线健康监测设备的发展具有重要的推动作用。

A Whole Integrated System for Detection of Neural

Signal and Wireless Transmission

Dang Hua*, Qu Ruoyuan, Chen Zhiming, Gui Xiaoyan and Wang Xinghua

School of Information and Electronics

Beijing Institute of Technology

Beijing, China

Email: danghua@bit.edu.cn

Abstract—A whole integrated system for detection of Neural

Signal and wireless transmission at 2.4G-2.5GHz is presented in

this paper. The system is consisted of low noise OPA, high

precision analog to digital convertor (ADC), radio-frequency (RF)

transmitter and RF receiver. Analog processing module are

specially designed based on high input impedance and low noise

requirements for neural signal detection, and RF circuits are

based on IEEE STD802.15 transmitter characteristics.

Fabricated in a 0.18



m CMOS process and tested in a neural

acquisition system, the IC prototype occupies 2.88mm

and

works functionally, which can be a wide solution for wireless

neural signal processor.

Keywords—LNopa, ADC, wireless technique, neural signal.

I. INTRODUCTION

The biological brain and neural function research has been

more and more popular in modern medical and clinical

application: on the one hand, Electrical stimulation by neural

microelectrodes has been applied in treatment of intractable

diseases such as polio and Parkinson's disease; on the other

hand, real neural signals offers reliable data for diagnosis[1].

However, the traditional wired acquisition is inconvenient,

which not only constrains the freely moving measured object,

but also causes distraction, SNR decline and wound

infection[2]. In order to overcome all these limitations and

acquire specific electronic neural signal which is more accurate,

safer, and more efficient and less delay, this paper presents a

wireless neural acquisition system, which has been fabricated

and tested in 0.18ȣm CMOS process. The RF works on a

bandwidth of 2.4G-2.5GHz. That is because bandwidth

between 2.4G-2.4835GHz is ISM (Industrial Scientific Medical)

Band, which is license free and makes the design in this paper

usable for as many applications as possible. This paper is

organized as below: circuit design considerations will be

introduced in the second part; the chip test result will be

analyzed in the third part; the fourth part is the summary of the

main work.

II. C

IRCUIT DESIGN

A. Architecture Design

The design proposed in this paper is based on neural signal

acquisition system; the system architecture is shown in Fig. 1.

Analog processing contains low noise amplifier (LNopa) and

ADC. Working frequency of the RF circuits is chosen

according to WIFI and Bluetooth standard (Design frequency is

2.4-2.5GHz), which makes the transmitter a commonly used

interface. OOK modulation is adopted in this design as OOK

has bunch of advantages. The most important one is that this

modulation has nothing to do with the phase information,

which releases the requirement for the carrier signal. Then the

VCO can be used to provide carrier instead of phase locked

loop, which is good for power consumption. Meanwhile, OOK

has the simple circuit implement and less power consumption,

although 1.5 times less bandwidth utilization compared with

Frequency Shift Key modulation method [3]; Carrier signal is

generated by low power VCO. Therefore serial data controls

the OOK modulator on or off, and then the modulated signal

will be sent out by the off-chip antenna after being amplified by

the power amplifier, which transmits data as long as 30 meters.

Fig. 1. Neural acquisition system

B. Analog Processing

Low noise amplifier and ADC are well designed in the

analog processing module: the amplifier is used to acquire

neural signal with a high impedance and low noise

requirements and ADC digitalize the signal for efficient signal

processing.

The following architecture is input stage amplifier that is as

shown in Fig. 2. It is a two stages fully-differential amplifier;

the first stage is common-source amplifier with cross couple

load, the second stage is consisted of a PMOS input

common-source and a NMOS input common-source. The

common mode feedback circuit is a differential input and single

output common source amplifier and capacitors and resistors

are used to collect the common voltage of the main amplifier.

For low noise consideration, input transistors are designed in

large size for lower thermal noise.

This research is supported by the “Strategic Priority Research Program” o

the Chinese Academy of Sciences (Grant No. XDA06020101) and the national

science foundation for young scientists of China (Grant No.61201040).

2013 IEEE International Conference on Green Computing and Communications and IEEE Internet of Things and IEEE Cyber,

Physical and Social Computing

DOI 10.1109/GreenCom-iThings-CPSCom.2013.327

1779

下载后可阅读完整内容，剩余4页未读，立即下载

weixin_38630463

粉丝: 3
资源: 902

2.4G-2.5GHz神经信号检测与无线传输集成系统设计

基于无线传输的智能路灯控制系统设计.rar

无线脑电信号采集检测系统

C8051F340控制的高效EEG信号采集与无线传输系统

C8051F340单片机驱动的高效EEG信号采集与无线传输系统

STM32单片机FPGA毕设电路原理论文报告基于zigbee的无线传输红外线计数系统研究

异构环境下无线传感大数据跨域传输安全控制系统设计.pdf

双模无线神经信息检测系统：设计、实现与性能验证

高分毕业设计：STM32F407无线脑电信号采集系统完整资料

Android EEG系统：无线脑电信号采集与分析设计

MSP430F169与CC2500协作的低功耗无线脑电信号采集系统设计

最新资源