负反馈放大电路的仿真分析.doc

摘要
负反馈电路在科学领域中的应用很多,电子放大电路中采用负反馈的目的是为了改善放大电路的工作性能。负反馈放大电路是由是由基本放大电路和反馈网络组成,在电子技术中应用十分广泛,它对电路的性能指标有较大的影响。它可作为整机放大器的输入级和中间级,具有电压、电流的放大能力。
理论分析负反馈对放大电路的影响较为抽象,因此本文运用EWB软件对负反馈放大电路进行仿真,分析了负反馈放大电路开环与闭环的放大倍数、输出电阻、频率响应和失真系数影响。最后通过仿真分析得出负反馈放大电路具有减少放大倍数,提高了放大倍数的稳定性,减小了非线性失真和抑制干扰, 拓宽了通频带, 改变了输入/输出电阻。
关键词:EWB;负反馈;放大电路;仿真

Abstract
Negative feedback circuit in the field of science, electronic application using negative feedback amplifier circuit, the purpose is to improve the performance of amplifying circuit. Negative feedback amplifying circuit is driven by the basic amplifying circuit and the work, in electronic technology, it is widely used in the circuit performance index has considerable influence. It can be used as the input stage amplifier and middle class, with current and voltage amplifier.
Through the application of EWB software simulation to negative feedback amplifying circuits and negative feedback amplifying circuit of open loop and closed-loop magnification, output resistance, frequency response and distortion coefficient is analyzed. Theoretical analysis of the effect of negative feedback amplifier circuit is abstract, use EWB simulation software, you can obtain the result. Visual image reflects feedback amplifier circuit, after introducing reduced magnification, improve the stability of the magnification, reduced the nonlinear distortions and restrain the interference, broaden the passband, change the input/output resistance.
Keywords: EWB, Negative feedback, Magnifying circuit, Simulation,
目录
目录 0
摘要 I
关键词 I
引言 1
1 绪论


2 EWB软件的功能特点 1
EWB软件简介 1
EWB软件的特点 1
3 负反馈放大电路的特点 2
3 .1 负反馈对放大器性能的影响 2
3 .2 放大电路的幅频特性 2
4负反馈放大电路的实验电路图的搭建 3
4 .1 负反馈放大电路的方框图 3
负反馈放大电路所用元器件简介 4
负反馈放大电路图的搭建 5
5负反馈放大电路的实验仿真分析 6
6
7
9
10
11
结束语
参考文献 13
致谢 14
负反馈放大电路的仿真分析
引言
随着电子技术和计算机技术的飞速发展,电子电路的设计已进入高集成度、高智能化的时代。而传统的电子电路与系统的设计方法,周期长、效率低、耗材多,难以满足现代化电子技