Multisim中放大调理电路的设计与仿真  

Design and Simulation of Amplification and Conditioning Circuit in Multisim

作　　者：于新颖 Yu Xinying(School of Information, Business College of Shanxi University, Taiyuan Shanxi 030031, China)

机构地区：[1]山西大学商务学院信息学院,山西太原030031

出　　处：《山西电子技术》2020年第4期3-5,共3页Shanxi Electronic Technology

基　　金：山西大学商务学院科研基金项目:《自适应噪声抵消系统的研究与实现》(2019009)。

摘　　要：随着各种现代电子产品的持续更新换代,人们对生产生活中各种电子设备的音质效果有了更高的追求,进而对周边的生产生活环境也产生了更为严苛的要求。自适应噪声抵消系统能对声音信号完成有效的噪声处理,降低噪声干扰信号,所以能深度适应当前社会发展需求。但自适应噪声抵消系统中,采集进来的声音信号一般是较微弱的,如果直接进行噪声抵消处理,信噪比太低,效果不好。本文通过借助NE5532高性能运算放大器构成前置放大调理电路,可对采集进来的弱信号进行有效放大。经在Multisim中仿真验证可知,此放大调理电路的输出波形形状不变、幅值增加,能有效实现放大作用,从而为自适应噪声抵消系统的研究提供合适的输入信号,保障其正常运转。With the continuous upgrading of various modern electronic products,people have a higher pursuit of sound quality effects of various electronic devices in production and life,and thus have more imposed stringent requirements on the surrounding production and living environment.The adaptive noise cancellation system can effectively process sound signals and reduce noise interference signals,so it can deeply adapt to current social development needs.However,in the adaptive noise cancellation system,the sound signal collected is generally weak.If the noise cancellation process is performed directly,the signal-to-noise ratio is too low and the effect is not good.In this paper,by using the NE5532 high-performance operational amplifier to form a preamp conditioning circuit,the weak signals collected can be effectively amplified.According to simulation verification in Multisim,it can be known that the output waveform shape of the amplification conditioning circuit does not change and the amplitude increases,which can effectively achieve the amplification effect.This provides a suitable input signal for the research of adaptive noise cancellation system,to ensure its normal operation.

关 键 词：自适应噪声抵消系统 放大电路 NE5532 

分 类 号：TP701[自动化与计算机技术—检测技术与自动化装置]