斜率鉴频器鉴频特性及其仿真研究
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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。在介绍单回路离谐斜率鉴频器和双回路离谐斜率鉴频器电路工作特点的基础上,分析了利用Multisim 10.0仿真软件对两类斜率鉴频电路进行构建和鉴频波形仿真的方法。仿真结果表明,单回路离谐斜率鉴频器电路简单,但输出信号小、非线性失真较大,双回路离谐斜率鉴频器波形输出信号大、失真较小、通频带较宽,但电路调整较困难,调整时要注意使电路对称。
The discriminator is often used as demodulation circuit of frequency modulation signal in receiver. Based on the brief introduction of the characteristics of the discriminator circuit,this paper analyzes the method of building discriminator circuits and simulating waveform by Multisim 10. 0 simulation software. The simulation results show that the single slope discriminator circuit has simpler structure,smaller amplitude of output signal and more apparent nonlinear distortion; while the double slope discriminator has larger amplitude of output signal,wider bandwidth and smaller nonlinear distortion. But it is more difficult for the double slope discriminator to be made symmetry.
The discriminator is often used as demodulation circuit of frequency modulation signal in receiver. Based on the brief introduction of the characteristics of the discriminator circuit,this paper analyzes the method of building discriminator circuits and simulating waveform by Multisim 10. 0 simulation software. The simulation results show that the single slope discriminator circuit has simpler structure,smaller amplitude of output signal and more apparent nonlinear distortion; while the double slope discriminator has larger amplitude of output signal,wider bandwidth and smaller nonlinear distortion. But it is more difficult for the double slope discriminator to be made symmetry.
引文
[1]王立华.基于Multisim 10的射频LNA仿真和设计[J].电子设计工程,2012,20(9):23-25.
[2]纪明霞,邵红.基于Multisim的磁控防盗报警器的设计与仿真[J].国外电子测量技术,2011(9):76-78.
[3]吴凌燕.基于Multisim11的串联谐振电路特性研究[J].国外电子测量技术,2011,30(8):84-86.
[4]张宁,辛修芳.Multisim 10在高频电路实验中的应用[J].现代电子技术,2010(13):48-50.
[5]张肃文.高频电子线路[M].4版.北京:高等教育出版社,2008.
[6]杨莲红,杨奇,孙万麟.基于Multisim10的单管共射放大电路静态分析[J].现代电子技术,2014(5):127-130.
[2]纪明霞,邵红.基于Multisim的磁控防盗报警器的设计与仿真[J].国外电子测量技术,2011(9):76-78.
[3]吴凌燕.基于Multisim11的串联谐振电路特性研究[J].国外电子测量技术,2011,30(8):84-86.
[4]张宁,辛修芳.Multisim 10在高频电路实验中的应用[J].现代电子技术,2010(13):48-50.
[5]张肃文.高频电子线路[M].4版.北京:高等教育出版社,2008.
[6]杨莲红,杨奇,孙万麟.基于Multisim10的单管共射放大电路静态分析[J].现代电子技术,2014(5):127-130.