一种以相乘器为核心的低电平调幅电路设计  

Design of Multiplier-centered Low-Electric-Level AM Circuit

作　　者：林章[1] 

机构地区：[1]福建师大福清分校电子与信息工程系,福建福清350300

出　　处：《福建师大福清分校学报》2009年第5期34-38,共5页Journal of Fuqing Branch of Fujian Normal University

摘　　要：采用集成模拟相乘器为核心的低电平调幅电路,只要调节电路中其中一个直流参数,就改变了电路的调幅系数,电路就能实现普通调幅波AM到过调幅波直至双边带调幅波的连续过渡,无论调幅系数大于1、小于1还是无穷大,通过乘积型同步检波电路,就可实现不失真的解调,打破了许多文献中调幅系数不能大于1的界定。同时利用该直流参数可以测试该电路中模拟相乘器增益系数和调幅系数。By adopting the amplitude modulation circuit with MC1496 integrated analog multiplier as its core, any modulation of one of the DC parameters would change the amplitude modulation coefficient, which makes it possible to realize consecutive transitions from ordinary AM wave to overmodulation wave and DSM wave, and realize undistorted modulation through product Synchronous detector regardless of the magnitude of the modulation coefficient whether it being more or less than 1 or being infinite, thus disproving the claim that amplitude analog multiplier gain eoefficient and amplitude modulation coefficient of the said circuit can be tested with the said DC parameter.

关 键 词：直流参数 模拟相乘器 调幅 调幅系数 

分 类 号：TN76[电子电信—电路与系统]