搜索 - 科创

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LK0119 [Q]必要带宽（necessary bandwidth）是指：对给定的发射类别而言，其恰好足以保证在相应速率及在指定条件下具有所要求质量的信息传输的所需带宽。业余电台单边带话音通信SSB...

等效电容很小，作用不大，通常忽略不计，即使是电容分相式感应电机也同样如此。而且，对于一个震荡系统，一个基本条件就是其回馈的能量要强大到能够影响输入能量的程度，电机的输入能量极其强大，而且自身的电感电容...

[s:271] [s:271] 鼓励折腾......不过我不推荐用555作频率跟踪......这个事我和“奇侠”“金科居室“都说过......我自己也早不用了....原因就是好多功能实现起来比较麻烦。...

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