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用万用表确定三极管的种类和3个极性
三极管 种类大致分2种,一种NPN型 三极管 ,另外一种为PNP 三极管 。三极管由2个PN结组成。因此,我们可以将三极管看作由2个二极管组成。通过下图可以知道,三极管的公共端为B极(基极)。
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