基于开关鉴相的同步检波电路的设计与仿真分析

Design and Simulation Analysis of Synchronous Detection Circuit Based on on-off Phase Discrimination

接收机对调制信号进行同步检波是识别原目标信号频率和相位参数的重要手段;为提高信号识别精度,建立了一种开关鉴相型同步检波电路,通过原理分析以及在Multisim环境中进行仿真研究,得到了不同相差、频差条件下的检波输出信号;仿真结果表明:该电路能精确的解调已调制信号,且鉴频、鉴相精度良好。

Synchronous detection of the received modulated signal is an important means to identify the frequency and phase parameters of the original target signal.In order to improve the recognition accuracy of signal,an on-off Phase Discrimination Circuit was established.Through the principle analysis and simulation study in Multisim environment,the detection output signals with different phase and frequency differences were obtained.The simulation results show that the circuit can accurately demodulate the modulated signal,and has high precision of frequency and phase discrimination.