直接调频发射机系统说明书

目 录 TOC \o "1-3" \h \z \u 前言 PAGEREF _Toc409108656 \h 1一 、绪论 PAGEREF _Toc409108657 \h 21.基本原理 PA

目录 ........................................................................................................................................................... 1 前言 .................................................................................................................................................. 2 一、绪论 ......................................................................................................................................... 2 1.基本原理 ......................................................................................................................................... 3 二、频率的调制 ....................................................................................................................... 3 2.1调频的方法及原理 ................................................................................................................................ 3 1）直接调频原理 ...................................................................................................................... 3 2）晶体振荡器直接调频 ................................................................................................ 5 三、基于Multisim的调频电路设计与分析 ............................................................................................................... 5 3.1Multisim软件介绍 ......................................................................................... 6 3.2基于Multisim的频率的调制仿真分析 ................................................................................................................ 6 3.2.1单元电路设计及分析 .............................................................................................................. 6 1）石英晶体振荡器直接调频 ......................................................................................................................... 7 2）丙类谐振功率放大 ........................................................................................................................................... 9 3）倍频器 ................................................................................................................ 10 4）二极管单平衡混频电路 .................................................................................................................................... 12 四、整机电路设计 ........................................................................................................................................... 13 五、设计总结 .................................................................................................................................................. 14 参考文献 ......................................................................................................................................................... 15 致谢