What's not so well known is that some ordinary NPN transistors such as the 2N2222, 2N3904 and 2N4401 exhibit negative resistance when reversed biased.
但是，却很少有人知道，一些普通的NPN三极管，如2N2222、2N3904和 2N4401，在反向偏置时也表现出负阻特性。
What's not so well known is that some ordinary NPN transistors such as the 2N2222, 2N3904 and 2N4401 exhibit negative resistance when reversed biased.
但是，却很少有人知道，一些普通的NPN三极管，如2N2222、2N3904和 2N4401，在反向偏置时也表现出负阻特性。
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