60MHz中频大调制指数相位调制的实现

Realizing The Phase Modulation of Large Modulating Index On 60MHz Intermediate Frequency

采用可变移相法相位调制与倍频技术相结合可获得大调制指数的相位调制。本文提出了实现这种方案的具体电路和设计方法。对晶体振荡器的频稳度、晶体管参量倍频器以及该方案的调相指数进行分析，并给出调试和测量的结果。理论分析与测量结果十分吻合。

Using a method of combining variable phase shift with frequency multiplication，large index phase modulation can be realized. For this purpose，practical circuits associated with design method are proposed. Frequency stability of crystal oscillator，transistor parameters of frequency multiplier，and the modulating index are thoroughly analyzed. The results of adjustment，test and measurement are also given. The results of practical measurement are satisfactorily in accordance with theoretical analysis.