电流型放大器
院系： 班级： 姓名： 学号： 同组人：控制科学与工程系 自动化0902班 谭位佳 U200914526 朱时中闫士杰
摘要
主要介绍了MOSFET的概念、结构、工作原理、基本类型、工作特性、交流小信号等效电路、放大电路以及如何利用MOSFET器件来设计电流型放大器，包括共源共栅电路的设计及参数分析，OCA闭环分析和参数计算和Hspice仿真分析与调试。 关键词
电流型放大器 MOSFET 共源共栅电路Hspice仿真宽长比 直流分析交流分析开环增益带宽转换速率静态电流瞬态分析 Abstract
We mainly introduced the structure of MOSFET, the working principle of MOSFET、the basic type of MOSFET、the workingcharacteristics of MOSFET、the small-signal equivalent circuit of MOSFET and the amplifying circuitof MOSFET. We also introduced the common source of gate circuit design and parameter analysis、the closed loop analysis and parameter calculation and the simulation analysis and debugging of Hspice. Key word
Current model amplifier、MOSFET、Common source gate circuit、Hspicesimulation、width to length ratio、DC analysis 、AC analysis、Open loop gain、band width、conversion rate、quiescent current、 Trans analysis
目录
电流型放大器................................................................................................................... 1 1 题目要求 ...................................................................................................................... 5 2 设计理论基础 ............................................................................................................... 5
2.1 MOSFET的概念 .................................................................................................. 5 2.2 MOSFET的基本结构 ........................................................................................... 6 2.2 MOSFET基本类型............................................................................................... 7 2.3 MOSFET工作原理............................................................................................... 7 2.4 MOSFET工作特性............................................................................................... 8 2.5 MOSFET交流小信号等效电路 ............................................................................11 2.6 MOSFET及其放大电路...................................................................................... 13 3设计过程 ..................................................................................................................... 17
3.1设计基础 ........................................................................................................... 17
3.2理论设计 ........................................................................................................... 17 3.3 参数确定 .......................................................................................................... 18 3.4 由设计参数验证结果 ......................................................................................... 19 4 电路仿真及调试.......................................................................................................... 20
4.1 Hspcie网表及其仿真代码 ................................................................................... 20
4.2直流分析 ........................................................................................................... 21 4.3交流分析 ........................................................................................................... 22 4.4瞬态分析 ........................................................................................................... 23 5 设计结果讨论 ............................................................................................................. 24
5.1 结果对比 .......................................................................................................... 24 5.2误差分析 ........................................................................................................... 24
5.3特征尺寸对性能的影响 ...................................................................................... 25 5.4 关于设计的几点思考 ....................................................................................... 25 6 心得与体会................................................................................................................. 25 7 参考文献 .................................................................................................................... 26
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