摘要
鉴相器在调谐回路的检测中具有非常重要的作用。分析了二极管平衡鉴相器电路及其相应取样电路的工作原理。针对该电路的不足,提出了新的解决方案及元器件参数的设计方法。该方案以乘法器和低通滤波器为鉴相器的核心电路。实验结果表明,该方案能方便地调节取样信号的幅度,能精确地检测出失谐电路的失谐状态,并输出相应的电压信号。
The phase detector is very important in the application of tune circuit detection.The principle of diode balanced phase detector and its corresponding sampling circuit are analyzed,and a new project of phase detector and design method of component parameters are proposed for the shortcomings of the circuit.The multiplier and low pass filter are pivotal parts of the new project.Experimental results show that the new project can control the range of sampling signal conveniently,detect the state of detune in detuned circuit accurately,and output the corresponding voltage signal.
出处
《现代电子技术》
2012年第5期163-166,共4页
Modern Electronics Technique
关键词
鉴相器
调谐回路
乘法器
低通滤波器
phase detector
tune circuit
multiplier
low pass filter
