图目录 图2-1手工计算噪声系数时的等效电路 …6 图2-2静态非线性的主要来源…9 图2-3单频点激励下的输出频谱示意图 …10 图2-4双频点激励下输出频谱示意图… …13 图2-5lP3实际测试图… …15 图2-6带外两个不同幅度的非线性输入情况下输出频谱示意图…16 图2-7SFDR等参数综合示意图…18 图2-8两级级联系统…… …19 图2-9原始超外差接收机系统架构…23 图2-10LO信号高位注入时镜像干扰的影响… 24 图2-11加入频带选择和镜像抑制滤波器后的超外差接收机…24 图2-12二次下变频接收机系统架构… 25 图2-13零中频接收机中自混叠现象… 26 图2-14当前流行的二次变频接收机架构… 26 图2-15零中频接收机架构… 27 图2-16L0信号与射频输入信号通路之间的耦合… 28 图3-1共栅低噪声放大器… 30 图3-2带并联输入阻抗的共源低噪声放大器…31 图3-3带电阻反馈的共源低噪声放大器… 32 图3-4带源极电感负反馈的共源低噪声放大器…33 图3-5增益提高技术应用于共栅低噪声放大器… 35 图3-6交叉耦合共栅低噪声放大器简单示意图…35 图3-7噪声抵消的基本原理及其应用 36 图3-8带反馈的共栅放大器…37 图3-9单个MOS管的gm与V6s之间的关系… 38 图3-10K2an和Kg与V6s之间的关系… 9 图3-11K2gn和Kgn与6s之间的关系… 39 图3-12分析反馈对线性度影响的模型…41 图3-13研究可变增益对输入匹配影响的小信号模型…42 图3-14可变增益情况下输入匹配优化的新结构模型…42 图3-15可变增益宽带低噪声放大器整体架构……44 图3-16用于高增益和中间增益通路的有源负反馈低噪声放大器…45III 图目录 图 2-1 手工计算噪声系数时的等效电路 ··············································6 图 2-2 静态非线性的主要来源···························································9 图 2-3 单频点激励下的输出频谱示意图 ············································10 图 2-4 双频点激励下输出频谱示意图 ···············································13 图 2-5 IIP3 实际测试图··································································15 图 2-6 带外两个不同幅度的非线性输入情况下输出频谱示意图 ··············16 图 2-7 SFDR 等参数综合示意图······················································18 图 2-8 两级级联系统·····································································19 图 2-9 原始超外差接收机系统架构 ··················································23 图 2-10 LO 信号高位注入时镜像干扰的影响······································24 图 2-11 加入频带选择和镜像抑制滤波器后的超外差接收机···················24 图 2-12 二次下变频接收机系统架构·················································25 图 2-13 零中频接收机中自混叠现象·················································26 图 2-14 当前流行的二次变频接收机架构···········································26 图 2-15 零中频接收机架构·····························································27 图 2-16 LO 信号与射频输入信号通路之间的耦合································28 图 3-1 共栅低噪声放大器·······························································30 图 3-2 带并联输入阻抗的共源低噪声放大器 ······································31 图 3-3 带电阻反馈的共源低噪声放大器 ············································32 图 3-4 带源极电感负反馈的共源低噪声放大器 ···································33 图 3-5 增益提高技术应用于共栅低噪声放大器 ···································35 图 3-6 交叉耦合共栅低噪声放大器简单示意图 ···································35 图 3-7 噪声抵消的基本原理及其应用 ···············································36 图 3-8 带反馈的共栅放大器····························································37 图 3-9 单个 MOS 管的 gm 与 VGS 之间的关系 ·····································38 图 3-10 2gm K 和 3gm K 与 VGS 之间的关系 ·············································39 图 3-11 2gm K 和 3gm K 与 VDS 之间的关系 ·············································39 图 3-12 分析反馈对线性度影响的模型··············································41 图 3-13 研究可变增益对输入匹配影响的小信号模型····························42 图 3-14 可变增益情况下输入匹配优化的新结构模型····························42 图 3-15 可变增益宽带低噪声放大器整体架构·····································44 图 3-16 用于高增益和中间增益通路的有源负反馈低噪声放大器 ············45