目录 目录… 图目录… …l川 表目录… …V 摘要… …1 Abstract.… …3 第一章概述… …5 1.1移动数字电视调谐器 6 1.2宽带可变增益低噪声放大器 6 1.3研究内容及贡献 8 1.4论文组织结构… e 第二章常见低噪声放大器 11 2.1主要性能参数… 11 2.1.1输入反射损耗系数 11 2.1.2噪声系数… 11 2.1.3线性度 12 2.1.4级联的噪声和线性度 72 2.1.5灵敏度 13 2.2传统结构的低噪声放大器… 13 2.2.1共源结构… 14 2.2.2共栅结构… 15 2.2.3电阻反馈结构… 的 2.3跨导增强和电容交叉耦合低噪声放大器 16 2.4噪声抵消低噪声放大器… 18 第三章有源负反馈低噪声放大器… 23 3.1电压增益和输入阻抗匹配 23 3.2噪声系数… 25 3.2.1噪声因子的计算… 25 3.2.2噪声因子的优化考虑… 27 32.3输入阻抗不匹配对噪声系数的影响… 28 3.3线性度… 29 3.4稳定性 32 第四章可变增益低噪声放大器的设计…33 4.1前言 33 4.2高增益模块……34目 录 目 录··························································································I 图目录························································································III 表目录························································································ V 摘 要·························································································1 Abstract······················································································3 第一章 概述················································································5 1.1 移动数字电视调谐器···························································5 1.2 宽带可变增益低噪声放大器··················································6 1.3 研究内容及贡献·································································8 1.4 论文组织结构····································································8 第二章 常见低噪声放大器···························································· 11 2.1 主要性能参数·································································· 11 2.1.1 输入反射损耗系数··················································· 11 2.1.2 噪声系数······························································· 11 2.1.3 线性度·································································· 12 2.1.4 级联的噪声和线性度················································ 12 2.1.5 灵敏度·································································· 13 2.2 传统结构的低噪声放大器··················································· 13 2.2.1 共源结构······························································· 14 2.2.2 共栅结构······························································· 15 2.2.3 电阻反馈结构························································· 15 2.3 跨导增强和电容交叉耦合低噪声放大器································· 16 2.4 噪声抵消低噪声放大器······················································ 18 第三章 有源负反馈低噪声放大器··················································· 23 3.1 电压增益和输入阻抗匹配··················································· 23 3.2 噪声系数········································································ 25 3.2.1 噪声因子的计算······················································ 25 3.2.2 噪声因子的优化考虑················································ 27 3.2.3 输入阻抗不匹配对噪声系数的影响······························ 28 3.3 线性度··········································································· 29 3.4 稳定性··········································································· 32 第四章 可变增益低噪声放大器的设计············································· 33 4.1 前言·············································································· 33 4.2 高增益模块····································································· 34