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實用電子/雙極型電晶體/NPN 電晶體
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從華夏公益教科書，一個開放世界的開放課本
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實用電子
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雙極型電晶體
NPN 電晶體是用一個正型半導體連線在兩個負型半導體之間製成的。一種有三個引腳的半導體器件：基極、集電極和發射極，形成雙結，即 BE 結和 BC 結
NPN 電晶體有此符號。發射極引腳的箭頭朝外。
電晶體電路
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書：實用電子
華夏公益教科書
