Frequency modulation is not possible with polychromatic light.

多色光不可能调制频率。

Therefore, the tuner is essential to the frequency modulation radio.

所以调频收音机中的频率调谐器是至关重要的。

A pulse frequency modulation (PFM) with discrete frequency is designed.

设计了一种离散频率的PF M控制方式。

The application of the variode in frequency modulation circuit are discussed.

讨论变容二极管在调频电路中的应用。

This thesis studies and designs a wireless interphone of frequency modulation.

本论文研究设计了一款调频无线对讲机。