神经信号放大与驱动集成电路设计与仿真

论文总字数：21571字

摘 要

关键词：运算放大器，神经信号，CMOS工艺 5

Abstract 6

Key words 6

第一章 绪论 7

1.1 放大器的发展历史 7

1.2 国内外放大器的研究现状 8

1.3本文主要工作背景和内容 9

第二章 放大器基本原理 11

2.1 MOS管模型 11

2.1.1 MOS管的工作原理 11

2.1.2 MOS管的大信号模型 13

2.1.3 MOS管的小信号模型 14

2.2 放大器的性能指标 14

第三章 常见运算放大器 17

3.1运算放大器 17

3.2单级运算放大器 17

3.3两级运算放大器 17

第四章 神经放大器设计 18

4.1 神经信号基础 18

4.2 动态失调 18

4.3 电路设计 19

4.3.1 方案基础 19

4.3.2 一级CMOS差分放大器 20

4.3.3 第二级CMOS共源放大器 23

4.3.4 参考电流源电路 23

4.3.5 放大器的频率补偿 24

第五章 实验与仿真 26

5.1直流增益 26

5.2共模放大仿真 28

5.3电源抑制比 28

第六章 总结 30

致谢 31

参考文献 32

神经信号放大与驱动集成电路设计与仿真

摘要

神经系统信号传递的重建在临床医学上一直是个难题，通过生物学的方法进行恢复有着较大的难度，因此医生和科学家都把目光汇聚在了可移植进生物体内的电子器件，希望利用生物体内神经信息的电信号传递特性来恢复神经系统的部分功能。要实现这一目的，一方面依赖于集成电路技术的不断发展，电子器件的尺寸不断减小；另一方面也对工程师们设计电路提出了更高的要求，要能够利用现有工艺设计出能够满足使用需求的放大器电路。

本文对神经信号放大相关领域的文献进行了调研和学习。希望在此基础上设计一款适用于神经信号放大的放大器。同时在工作的前期学习了放大器原理和设计方法的相关知识。本文的第一章绪论部分介绍了放大器的发展历史，国内外放大器的研究现状，本文的工作背景等等。第二章和第三章介绍了放大器的基本原理和常见的放大器。第四章为神经放大器的设计，第五章为实验与仿真，在第六章中进行了总结。根据已有的研究成果和实现方法确定了神经信号放大与驱动集成电路的设计，在电路的设计上，采用了两级电路。其中第一级采用CMOS差分放大器，第二级采用CMOS共源放大器。而这两级电路实现的功能的侧重点则各有不同。采用了Hspice软件进行仿真，得到直流开环增益为83.4157dB，单位增益带宽为22.5MHz。

关键词：运算放大器，神经信号，CMOS工艺

DESIGN AND SIMULATION OF NEURAL SIGNAL AMPLIFICATION AND DRIVER IC

Abstract

The reconstruction of the nervous system signal transmission is a really hard problem in today's clinical medicine. Using biological methods to complete the communication of the nervous system has more difficulties. Therefore, scientists and doctors have focused attention on the electronic components that could be transplanted into body. They hope to reconstruct the communication in the nervous system by imitate the electric signal used to transfer the information in our nervous system. To achieve this goal, on the one hand, we need to improve the integrated circuit technology. On the other hand, there will have a more difficult challenge for the IC engineers. When the IC engineers design a circuit, they must design a circuit that could meet the demands decided by the practical conditions. And, they have to consider the technology level. The quality of the technology is limited.

There are some knowledge relevant to nervous signal amplifier in this article. I hope to design an amplifier that can be used in nervous signal area. In the earlier stage of my work, I learned the theory about the amplifier and the methods of how to design an amplifier. In the first chapter of this article, there are some development history of amplifier, and the academic research related to this area both domestic and abroad, and the background of this article. The typical type of amplifier and the amplifier theory will be introduced in the second chapter and third. The content of the fourth chapter are the design of nervous signal amplifier. The experiment and simulation will be illustrated in the fifth chapter. And, lastly, in the sixth chapter, I made a conclusion. The design of the amplifier circuit was decided by the research results and methods to achieve an amplifier that could be found now. I used two parts to achieve the goal. The first part used CMOS differential amplifier. The second part used CMOS common-source amplifier. The main tasks of the two parts are different. I used the Hspice software to simulate, and the result illustrates that the DC open loop gain is 83.4157dB,the unity gain bandwidth is 22.5MHz.

Key words: operational amplifier, neural signal, CMOS technology

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