通信电子电路中的LC并联谐振回路

摘要

LC parallel resonant circuit is an unit circuit commonly used in communication electronic circuits. Its amplitude-frequency and phase-frequency characteristics were obtained by circuit analysis. The three main applications in communications electronic circuits are regarded as the frequency selection and matching network of amplifier, the frequency selection and feedback network of the sine wave oscillator, and the amplitude-frequency and frequency-phase converters in modulation and demodulation circuit.%LC并联谐振回路是通信电子电路中常用的单元电路.通过电路分析得出它的幅频特性与相频特性,认为它在通信电子电路中的应用主要有三种类型,即放大器的选频匹配网络、反馈式正弦波振荡器的选频反馈网络、调制与解调电路中的幅频变换及频相转换器件.