foldcascode运算放大器的设计与仿真(附件)【字数：6360】
摘 要 随着科技的飞速发展，集成电路技术越来越成熟，放大器是模拟电路设计中用途最广、最重要的部件。运算放大器有很多种结构，其中就有我们要研究的折叠共源共栅结构，共源共栅结构的优点明显，频率特性好、输出负载高、在各种放大器结构中功耗最低等，能够提高电路的直流增益而不影响增益带宽，被广泛的应用到各种电路中。 本文设计的是折叠式共源共栅运算放大器，该放大器的特点是，一是能够提高增益，二是能增加噪声抑制能力，还能自补偿。在本次设计中，我们首先介绍了差分式、折叠式等几种放大器结构，最终确立了折叠式共源共栅放大器。通过两级运算放大器的级联来实现放大器的功能，再通过Cadence仿真软件进行仿真，在一定的参数下得到仿真结果，参考开环和闭环增益等曲线和结果，对电路和参数进行反复调整，最终得到理想的参数。
指导教师 李建中 目 录
第一章 绪论 1
1.1课题的研究背景及意义 1
1.1.1课题的研究背景 1
1.1.2课题的研究意义 1
1.2国内外研究现状 1
1.3集成运放的发展趋势 2
1.4 本文章节安排 2
第二章 运算放大器的设计 3
2.1 CMOS运算放大器的基本介绍 3
2.2几种常见的运算放大器结构 3
2.2.1运算放大器的几种常见结构和分类 4
2.2.2简单的全差分结构 5
2.2.3运算放大器的设计方法 6
第三章 运算放大器的性能指标 8
3.1开环增益 8
3.2开环带宽 8
3.3输出摆幅 8
3.4转换速率 8
3.5建立时间 9
3.6共模抑制比 9
3.7功耗 10
3.8噪声 10
第四章 折叠共源共栅运算放大器的设计与仿真 11
4.1运算放大器的电路结构 11
4.2 折叠共源共栅放大器设计指标要求 12
4.3电路中各个器件的手工估算 12
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五章 共源共栅运算放大器的仿真 15
5.1仿真软件Cadence的介绍 15
5.2原理图设计和快捷键说明 15
5.3 共源共栅放大器仿真环境 15
5.3.1开环增益 16
5.3.2闭环增益 17
结束语 19
致 谢 20
参考文献 21
附录 22
附录A 仿真网表 22
附录B 仿真电路图 23
ABSTRACT
With the rapid development of science and technology, integrated circuit technology more and more mature, the analog circuit design is the most widely used, the most important components. Operational amplifier has a variety of structures, cascode structure is one of them, and has a good frequency characteristics, high output resistance, in a variety of amplifier structure, the advantages of the lowest power, can improve the circuits DC gain without affecting the gain Bandwidth, is widely used in a variety of circuits.
This paper is designed to fold the cascode operational amplifier, the amplifier is characterized by one can improve the gain, the second is to increase the noise suppression, but also in the output from the compensation. In this design, we first introduced the sleeve, folding and several other amplifier structure, and finally established a folding cascode cascade amplifier. Through the cascade of twostage operational amplifier to achieve the function of the amplifier, and then through the simulation software simulation, under certain parameters to get the simulation results, reference noise, common mode rejection ratio, open loop and closed loop gain curve and the results of the circuit And parameters are repeatedly adjusted, and ultimately get the desired parameters.
Key words:Operational Amplifier; Folded cascode;
第一章 绪论
1.1课题的研究背景及意义
1.1.1课题的研究背景
指导教师 李建中 目 录
第一章 绪论 1
1.1课题的研究背景及意义 1
1.1.1课题的研究背景 1
1.1.2课题的研究意义 1
1.2国内外研究现状 1
1.3集成运放的发展趋势 2
1.4 本文章节安排 2
第二章 运算放大器的设计 3
2.1 CMOS运算放大器的基本介绍 3
2.2几种常见的运算放大器结构 3
2.2.1运算放大器的几种常见结构和分类 4
2.2.2简单的全差分结构 5
2.2.3运算放大器的设计方法 6
第三章 运算放大器的性能指标 8
3.1开环增益 8
3.2开环带宽 8
3.3输出摆幅 8
3.4转换速率 8
3.5建立时间 9
3.6共模抑制比 9
3.7功耗 10
3.8噪声 10
第四章 折叠共源共栅运算放大器的设计与仿真 11
4.1运算放大器的电路结构 11
4.2 折叠共源共栅放大器设计指标要求 12
4.3电路中各个器件的手工估算 12
第 *好棒文|www.hbsrm.com +Q: ￥351916072￥
五章 共源共栅运算放大器的仿真 15
5.1仿真软件Cadence的介绍 15
5.2原理图设计和快捷键说明 15
5.3 共源共栅放大器仿真环境 15
5.3.1开环增益 16
5.3.2闭环增益 17
结束语 19
致 谢 20
参考文献 21
附录 22
附录A 仿真网表 22
附录B 仿真电路图 23
ABSTRACT
With the rapid development of science and technology, integrated circuit technology more and more mature, the analog circuit design is the most widely used, the most important components. Operational amplifier has a variety of structures, cascode structure is one of them, and has a good frequency characteristics, high output resistance, in a variety of amplifier structure, the advantages of the lowest power, can improve the circuits DC gain without affecting the gain Bandwidth, is widely used in a variety of circuits.
This paper is designed to fold the cascode operational amplifier, the amplifier is characterized by one can improve the gain, the second is to increase the noise suppression, but also in the output from the compensation. In this design, we first introduced the sleeve, folding and several other amplifier structure, and finally established a folding cascode cascade amplifier. Through the cascade of twostage operational amplifier to achieve the function of the amplifier, and then through the simulation software simulation, under certain parameters to get the simulation results, reference noise, common mode rejection ratio, open loop and closed loop gain curve and the results of the circuit And parameters are repeatedly adjusted, and ultimately get the desired parameters.
Key words:Operational Amplifier; Folded cascode;
第一章 绪论
1.1课题的研究背景及意义
1.1.1课题的研究背景
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