The method for generating the second signal is put forward based on the period rule of the phase difference for two frequency signals with the frequency difference. 摘要利用两个有一定频差的频率信号相位差变化的周期性规律提出了一种秒信号产生方法。
The reason inductors are used in crossover design is because the impedance of an inductor increases as the frequency of the signal applied to it goes up. 原因电感器中使用的交叉设计是因为阻抗电感增加的频率信号，适用于这是不言而喻了。
