阻抗变换电路在频率选择电路中的应用.pdf

研究与设计 Research and Design
阻抗变换电路在频率选择电路中的应用
王翠珍，任秀芳，邵红，杨晓霞
（海军航空大学青岛校区，青岛 266041）
摘要：阐述并联谐振电路的电路结构，分析了并联谐振电路的选频特性及信号源内阻和负载电阻对其选择
性和通频带的影响。利用阻抗变换电路减少信号源内阻和负载电阻对选频回路的影响，并分析了阻抗变换
电路在选频放大电路中对选频特性的改善作用。
关键词：频率选择，谐振电路，品质因数，阻抗变换，通频带。
中图分类号：TN713，TN011 文章编号：1674-2583(2021)03-0008-03
DOI：.1674-
中文引用格式：王翠珍，任秀芳，邵红，杨晓霞. 阻抗变换电路在频率选择电路中的应用[J].集成电路应
用, 2021, 38(03): 8-10.
Application of Impedance Transformation in
Frequency Selection Circuit
WANG Cuizhen, REN Xiufang, SHAO Hong, YANG Xiaoxia
( Qingdao Campus of Naval Aeronautical University, Qingdao 266041, China. )
Abstract — This paper describes the circuit structure of the parallel resonant circuit, analyzes the
frequency selection characteristics of the parallel resonant circuit and the influence of the internal
resistance of the signal source and the load resistance on its selectivity and passband. The impedance
transform circuit is used to reduce the influence of the internal resistance of signal source and load
resistance on the frequency selection circuit. It analyzes the improvement of the frequency selection
characteristics of the impedance transform circuit in the frequency selection amplifier circuit.
Index Terms — frequency selection, resonant circuit, quality factor, impedance transformation,
passband.
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