基于AD831低失真有源混频器的电路设计

字数:4220,页数:20

摘要：AD831是美国AD公司生产的单片低失真混频器，它采用双差分模拟乘法器混频电路。文中介绍了AD831的工作原理、引脚排列及功能说明。

关键词：混频器；射频；本振；中频；AD831

      混频器在广播、通信、电视等外差式设备及频率合成设备中具有广泛的应用，它是用来进行信号频率变换并可保持调制性质不变的电路组件，其性能对整个系统有着举足轻重的作用。AD831是AD公司生产的低失真、宽动态范围的单片有源混频器，它输入输出方式多样，使用灵活方便。
Abstract
The AD831 is a low distortion,wide dynamic,monolithic mixer by Analog Devices in U.S.A. Its pin，performance and so on are introduced in this atricle.

Key Words: mixer  RF  LO  IF  AD831

目 录

AD831芯片简介.....................................................................4
1简介.............................................................................4
2主要特性.........................................................................4
3应用.............................................................................4
4购买芯片指南.....................................................................4
1．5AD831芯片详细说明书...........................................................4
2. AD831芯片封装与引脚功能........................................................6
3. AD831内部结构与工作原理........................................................8
3．1混频原理......................................................................8
3．2  控制偏置电流................................................................8
3．3  低通滤波....................................................................9
3．4  输出放大器的应用............................................................9
3．5  AD831典型性能特征...........................................................9
4．下混频电路与上混频电路.........................................................16
4．1下混频电路....................................................................16
4．2上混频电路....................................................................17
4．3使用中应注意的问题............................................................18
5. 总结...........................................................................18
参考文献..........................................................................19