利用A/D和D/A实现频率变换的技术分析  

Technological Analysis of Realizing Frequency Conversion with A/D and D/A

作　　者：朱勤专[1] 

机构地区：[1]中国西南电子技术研究所,四川成都610036

出　　处：《电讯技术》2003年第6期78-80,共3页Telecommunication Engineering

摘　　要：通过建立A/D、D/A的数学模型,推导了A/D、D/A实现变频的基本公式,分析了量化噪声和变频损失,总结了其主要特点及其与模拟混频器的区别,说明A/D和D/A实现频率变换是切实可行的,在进行模数、数模转换的同时实现变频,有利于节省器件,简化电路。Through establishing mathematic model of A/D and D/A, this paper deduces the basic expressions of realizing frequency conversion with A/D and D/A, analyses the quantizing noise and conversion loss, and summarizes the difference between it and analog frequency conversion?While realizing frequency conversion, it can realize A/D conversion,D/A conversion ,and can save component and simplify circuit.

关 键 词：A/D D/A 频率变换 量化噪声 变频损失 通信系统 

分 类 号：TN911.7[电子电信—通信与信息系统] TN792[电子电信—信息与通信工程]