关于RC串并联选频网络实验的改进  

Improving on the experiment of series and parallel for RC network frequency selection

作　　者：张学文 司佑全 

机构地区：[1]湖北师范大学物理与电子科学学院,湖北黄石435002

出　　处：《湖北师范大学学报（自然科学版）》2017年第2期68-71,共4页Journal of Hubei Normal University：Natural Science

基　　金：湖北师范学院校级教研项目JH201129;ZD201121

摘　　要：RC串并联选频网络特性观测实验中,普遍采取的方法是在实验过程中,每改变一次频率时,都要调节信号源输出幅度,致使学生很难在有限的学时里完成幅频特性和相频特性的测量。通过在信号源和RC串并联选频网络之间加入由集成运放组成的电压跟随器,使得净输入信号幅值基本保持不变,避免信号源频率增大时引起RC串并联选频网络电路幅值减小,提高了实验的效率。About RC series and parallel frequency selective characteristic observation experiment, the method generally adopted is that the amplitude of the output signal source must be adjusted as the frequency is changed each time in the course of the experiment, which often results in students being difficult to accomplish the measurement on the frequen- cy characteristi^s and amplitude-frequency characteristics in a limited period. In this paper, by adding voltage follower composed with the integrated op amp between the signal source and frequency selection series and parallel RC network added by the integrated op amp, let the net input signal amplitude remain unchanged, to avoid decreasing of the fre- quency selective network series and parallel RC circuit amplitude owing to increasing of the signal source frequency, and improve the efficiency of the experiment.

关 键 词：RC网络 幅频特性 相频特性 

分 类 号：TM13[电气工程—电工理论与新技术]