模拟相乘器的计算机仿真分析

Computer Simulation Analysis of Analog Multiplier

Psp ice是目前应用广泛的电子线路仿真分析软件,如何利用Psp ice构建仿真模型分析模拟相乘器的原理与应用特点是文章的主要内容,包括由模拟相乘器实现双边带调幅、普通调幅、倍频等应用电路的仿真分析。通过Psp ice提供的分析工具作详细的瞬态、频谱分析,这样的仿真分析方法应用于教学实践中,可以较好地理解并掌握模拟相乘器的原理和特点。文中把频谱分析作为一个重点介绍,这是考虑到模拟相乘器实现相乘运算的本质是频率变换,而Psp ice提供了很方便的频谱观测与分析工具,这样即使在教学中没有昂贵的数字频谱仪的条件下,也可以借助Psp ice的仿真分析功能达到较好的教学效果。

Pspice is a widely used simulation analysis software of electronic circuit at present, the main content of the artical is how to construct the simulation model of analog multiplier using Pspice and its characteristic of application, the simulation analysis of the circuit including DSB, AM, doubled - frequency and so on by the analog multiplier. The Pspice provides analysis tool to make analysis of the transient and frequency spectrum in detail. Using simulation analysis in the teaching practice may help to understand and the theory and the characteristic of analog multiplier well. In the article the emphasis is frequency spectrum analysis, because the essence of the analog multiplier is the frequency transformation.