山東德慶電阻器RT52-225M-8/2直流母線上的電壓會迅速上升

電阻器的選型

   1.在高增益放大電路中.應(yīng)選用噪聲電動勢小的電阻器，如金屬膜也阻器、碳膜電阻器和線繞電阻器。

   2.針對電路的工作頻率選用不同類堪的電阻器。線繞電阻器的分布參數(shù)較大，即使采用無感繞制的線繞電阻器，其分布參數(shù)也比非線繞電阻器大得多，因而線繞電阻不適合在高頻電路中工作。在低于50kHz 的電路中，由于電阻器的分布參數(shù)對電路工作影響不大，可選用線繞電阻器。

3.在高頻電路中的電阻器，要求其分布參數(shù)越小越好。所以，在高達數(shù)百兆赫的高頻電路中應(yīng)選用碳膜電阻器、金屬膜電阻器和金屬氧化膜電阻器。在超高頻電路中，應(yīng)選用超高頻碳膜電阻器。

電阻器的型號

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