电视机中比例鉴频器的研究

Research on symmetrical ratio detector in TV

介绍了电视机中对称式比例鉴频器的作用,电路的构成。利用矢量法论述了将调频波(6.5MHz的第二伴音中频信号)变为调相调幅波和对调相调幅波进行检波得到原调制信号(伴音信号)的工作原理。

This paper introduced the function of symmetrical ratio detector and circuit constitution in TV. Using the vector method it elaborates the principle that how to change the FM wave （the second aeeompaniment signal of 6.5 MHz） into PM-AM wave and how to obtain the original signal using the detector.