正交相位鉴频器鉴频特性分析与仿真研究  

Analysis and Simulation of Frequency Characteristics of Quadrature Phase Discriminator

作　　者：王翠珍[1] 唐金元[1] 邵红[1] WANG Cuizhen;TANG Jinyuan;SHAO Hong(Qingdao Branch of Naval Aviation University,Qingdao 266041,China)

机构地区：[1]海军航空工程学院青岛校区,山东青岛266041

出　　处：《仪表技术》2021年第4期61-64,共4页Instrumentation Technology

摘　　要：鉴频器电路是无线电接收机中常用的调频信号解调电路。在介绍正交相位鉴频器电路结构和工作原理的基础上,分析了利用Multisim14.0仿真软件对正交相位鉴频电路进行构建和仿真的方法。仿真结果表明:正交相位鉴频器适用于解调频移量较小的调频信号。该电路只有一个调谐回路,结构简单,应用广泛。Frequency discriminator circuit is the demodulation circuit of frequency modulation signal in radio receiver.On the basis of introducing the circuit structure and working principle of quadrature phase frequency discriminator,the method of constructing and simulating quadrature phase frequency discriminator using Multisim14.0 simulation software is analyzed.The simulation results show that the quadrature phase frequency discriminator is suitable for demodulating FM signals with small frequency shift.The circuit of quadrature frequency discriminator has only one tuning loop.It is widely used in FM signal receiving circuit with simple structure.

关 键 词：相位鉴频器 仿真 调制指数 调频 调相 鉴频 

分 类 号：TN76[电子电信—电路与系统]