文档介绍：惠州学院
HUIZHOU UNIVERSITY
毕业论文(设计)
中文题目:具有特定功能的放大器的研制
英文题目:Has the specific functions of the
development of the amplifier
专业班级: 电气信息工程2008级(1)班
摘要
放大器是应用广泛的基本模拟电路,主要用于小信号的放大,基本性能指标有增益系数、输入电阻、输出电阻、通频带(带宽)等,依据不同的性能要求选用不同的集成运放作为放大器件,不同的集成运放其增益带宽积为不同的常数,输入电阻决定于第一级、输出电阻决定于最后一级。
对于实用的电压放大电路,通常要求其输入电阻大,以减小放大电路从信号源索取的电流,使其获得尽可能的输入电压;输出电阻小,有足够强的带负载能力;电压放大倍数大,即有足够的电压放大能力。而单管放大电路很难满足上述性能要求。因此采用多级放大电路。多级放大电路有多种耦合方式,本设计采用阻容耦合。另外如果放大级数过多的话会使其通频带变窄,放大电路的级数愈多,频带愈窄,所以尽量不要采用过多级数的放大电路。
关键词:放大器; 集成运放; 放大电路; 多级放大
Abstract
Amplifier is widely used in basic analog circuits ,mainly used for small signal amplifier ,basic performance indicators are gain coefficient, input resistance, output resistance, passband (bandwidth), etc ,according to different types of performance requirements choose different integrated operational amplifier device put as, different integrated operational put its gain bandwidth for different constant product, input resistance in the first level, to output resistance decided in the last one.
For practical voltage amplifier circuit, usually require its input resistance is big, to minimize amplifier circuit from the current source for, make its win as far as possible the input voltage; Output resistance small, have strong enough with load ability; Voltage magnification, namely have enough voltage amplifier ability. And single pipe amplifier circuit is hard to meet the performance requirements. So the multi-level amplifier circuit. Multi-level amplifier circuit has a variety of coupling way, this design USES the resistance and capacitance coupled. In addition if amplifier series too much words will make its passband narrow, amplifying circuit of the series, the narrow band, so try to not use too much amplifier circuit of the series.
Keywords: amplifier; op-amp integrated ; amplifier circuit; multi-level amplifier
目录
第1章绪论 1
具有特定功能放大器的背景和意义 1
概述 1
放大器的发展历程 1
我国放大器的发展现状 1
放大器分类 2
放大器的发展趋势 4