新工科高校电路实验课改革之——一种特殊的鉴频器  

Ref orm of Circuit Experiment Course in New Engineering University--A Special Frequency Discriminator

作　　者：崔建国 宁永香 Cui Jianguo;Ning Yongxiang(Shanxi Engineering and Technology College,Yangquan Shanxi 045000,China)

机构地区：[1]山西工程技术学院,山西阳泉045000

出　　处：《山西电子技术》2020年第6期3-5,共3页Shanxi Electronic Technology

摘　　要：传统AFC电路可以实现压控振荡器频率以某一固定频率为基准,实现振荡频率的自动调整,希望设计一种新颖的鉴频器电路实验,以符合特殊工业设计需要,这种鉴频器希望压控振荡器的振荡频率必须同步跟踪某一随机输入信号的频率,通过设计一个频率比较器电路,该比较器电路由两个二极管泵电路及充、放电电路组成,频率比较器输出一个基准电压值,该基准电压将控制压控振荡器,使其振荡频率紧密跟随随机输入信号频率。The traditional AFC circuit can realize the frequency of VCO based on a fixed frequency,and realize the automatic adjustment of the oscillation frequency.The paper hopes to design a novel frequency discriminator circuit experiment to meet the needs of special industrial design.The discriminator wants the oscillator frequency to be synchronized with the frequency of a random input signal.By designing a frequency comparator circuit,the comparator is composed of two diode pump circuits and the charge and discharge circuits.The frequency comparator outputs a reference voltage value,which will control the VCO and make its oscillation frequency closely follow the random input signal frequency.

关 键 词：AFC 新工科 频率比较 泵电路 基准电压 VCO 

分 类 号：TP271[自动化与计算机技术—检测技术与自动化装置]