电压串联负反馈放大电路设计与仿真课程设计.docx
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电压串联负反馈放大电路设计与仿真课程设计.docx
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电压串联负反馈放大电路设计与仿真课程设计
目录
摘要··························································································································2
关键词······················································································································2
Abstract··················································································································2
Keywords··················································································································2
一、引言···············································································································3
1.1研究本课题的重要性··············································································3
1.2集成电路产业简介···················································································3
1.3PSPICE软件的介绍················································································3
二、放大电路介绍···························································································6
三、放大电路的设计与仿真···········································································10
3.1电路设计框图··························································································10
3.2电路版图··································································································10
3.3局部电路分析··························································································11
3.4直流分析··································································································12
3.4.1直流工作点分析··········································································12
3.4.2温度对静态工作点的影响··························································13
3.5瞬态分析··································································································14
3.6交流分析··································································································15
3.6.1输入电阻······················································································16
3.6.2输出电阻······················································································16
3.6.3放大电路的频响特性及其增益··················································17
四、心得体会·········································································································19
致谢··················································································································20
参考文献·········································································································21
附录··················································································································22
电压串联负反馈放大电路的设计与仿真
摘要:
主要对电压串联负反馈放大电路进行了设计与仿真,主要利用其放大功能。
该放大器主要分为4个部分:
输入级、中间级、输出级以及负反馈回路。
其主要核心思想是利用电压负反馈减小增益改变对电路频率特性的影响,同时获得较好的放大效果。
通过PSPICE软件对其进行直流分析、瞬态分析、交流分析等等。
关键词:
晶体管;放大器;电路设计;PSPICE
Abstract:
themainvoltageseriesnegativefeedbackamplifyingcircuitdesignandsimulation,mainlyusethezoomfeature.Thatamplifiercomprises4majorcomponents:
inputlevel,intermediateoutput,levelandnegativefeedbackcircuit.Whosemaincoreideaisusingvoltagenegativefeedbackreducesthegainchangeeffectsoncircuitfrequencycharacteristics,bothbetterZoomeffect.ByPSPICEsoftwareonitsDCanalysis,ACanalysis,transientanalysis,andsoon.
Keywords:
transistors;amplifiercircuitdesign;PSPICE
一、引言
1.1研究本课题的重要性
随着微电子技术、大规模集成电路和电子计算机计算的快速发展、电路设计规模的扩大、电路复杂程度的加深,传统的电路设计方法已经不能满足现代电路设计的要求。
电子电路的分析与设计方法发生了重大变革,目前以CAD和CAA为基础的电子设计自动化技术已广泛应用于电子系统的分析与设计之中,并成为现代电子系统分析与设计不可缺少的重要工具。
现在完全可以说,离开了EDA技术,很难圆满的完成一个电路和系统的设计任务。
1.2集成电路产业简介
1.发展集成电路的意义
发展具有战略意义的集成电路产业以占领科技、经济和军事制高点已经成为许多国家的共识。
集成电路产业已经成为当今世界发展最为迅速和竞争最为激烈的产业[1]。
.集成电路产业链结构
图1集成电路产业链结构
图2集成电路产业链
1.3PSPICE软件的介绍
1.PSPICE软件简介
PSPICE是非常出色的EDA软件,它的5.00以上版本是在windows下的模拟电路和数字电路的混合仿真软件,因而得到相当广泛的应用。
PSPICE软件具有强大的电路图绘制功能、电路模拟仿真功能、图形后处理功能和元器件符号制作功能,以图形方式输入,自动进行电路检查,生成图表,模拟和计算电路。
它的用途非常广泛,不仅可以用于电路分析和优化设计,还可用于电子线路、电路和信号与系统等课程的计算机辅助教学[2]。
与印制版设计软件配合使用,还可实现电子设计自动化。
被公认是通用电路模拟程序中最优秀的软件,具有广阔的应用前景。
这些特点使得PSPICE受到广大电子设计工作者、科研人员和高校师生的热烈欢迎,国内许多高校已将其列入电子类本科生和硕士生的辅修课程[3]。
在PSPICE中,对元件参数的修改很容易,它只需存一次盘、创建一次连接表,就可以实现一个复杂电路的仿真。
如果用Protel等软件进行参数修改仿真,则过程十分繁琐。
在改变一个参数时,哪怕是一个电阻阻值的大小都需要重新建立网络表的连接,设置其他参数更为复杂[4]。
PSPICE是一种通用的电子电路分析模拟软件,它主要用于在对所分析的电路硬件实现之前,先用计算机对电路进行模拟分析。
它由电路原理图输入程序、激励源编辑程序、电路仿真程序、输出结果绘图程序、模拟参数提取程序和元器件模型参数库六部分组成。
PSPICE支持电路原理图和网单文件两种输入方式,电路元器件符号库提供绘制电路原理图的所有元器件符号;具有正弦波、脉冲源、指数源、分段线性源、单频调频源等种类繁多的信号源。
作为PSPICE的核心部分——仿真功能包括:
直流工作的分析、直流转移特性分析、直流小信号传递函数分析、交流小信号分析、交流小信号噪声分析、瞬态分析、傅里叶分析、直流灵敏度分析、温度分析、最坏情况分析和蒙特卡罗统计分析等;仿真结果可在屏幕绘出曲线、波形,并可打印输出[5]。
2、PSPICE使用中应该注意的问题
在使用PSPICE软件仿真时,常会碰到按常规方法所绘制的电路图不能在该平台上正常运行的情况。
例如,在以PSPICE为内核的虚拟电子工作平台上,要求每个节点至少应接两个元件,即不能有悬节点;为了对电路进行分析,PSPICE还规定,每一个节点必须有一条通向地节点的直流通路,有时电路中并不能满足,如某些滤波电路,在这种情况下,只要连接一个非常大的电阻到地,以提供一条直流通路;在用PSPICE设计的电路中,不允许存在悬空的元件端口,如电阻、电容、电感等器件端口;数字集成电路的输出端引脚因不用而造成悬空,在实际电路设计时,通常将其通过电阻或电容接地,但在虚拟电子工作平台上,,最好用专用符号与之连接[6]。
要真正达到利用该软件进行电子电路的仿真分析与设计的目的,必须具备熟练使用该软件的能力、扎实的电子电路方面的理论知识和较
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- 关 键 词:
- 电压 串联 负反馈 放大 电路设计 仿真 课程设计
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