佛山回收傳感器收購鉭電容
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我們專業(yè)采購電子材料、回收電容器材料、回收三極管材料，回收IC集成電路/存儲器/顯卡/網(wǎng)卡/聲卡/計算機芯片/閃存/存儲器/二極管三極管/電解電容器/光電IC/接收管/晶體振蕩器/等電子元器件。它包括電子元件，如制造商和公司的積壓庫存，轉(zhuǎn)換和清關。
二極管是用半導體材料(硅、硒、鍺等)制成的一種電子器件。它具有單向?qū)щ娦阅?，即給二極管陽極和陰極加上正向電壓時，二極管導通。當給陽極和陰極加上反向電壓時，二極管截止。因此，二極管的導通和截止，則相當于開關的接通與斷開。二極管是最早誕生的半導體器件之一，其應用非常廣泛。
二極管就是由一個PN結加上相應的電極引線及管殼封裝而成的。采用不同的摻雜工藝，通過擴散作用，將P型半導體與N型半導體制作在同一塊半導體(通常是硅或鍺)基片上，在它們的交界面就形成空間電荷區(qū)稱為PN結。由P區(qū)引出的電極稱為陽極，N區(qū)引出的電極稱為陰極。因為PN結的單向?qū)щ娦?，二極管導通時電流方向是由陽極通過管子內(nèi)部流向陰極。
二極管有兩個電極，由P區(qū)引出的電極是正極，又叫陽極;由N區(qū)引出的電極是負極，又叫陰極。三角箭頭方向表示正向電流的方向，二極管的文字符號用VD表示。
二極管的種類很多，分辨正負極的方法也不盡相同。以下小編列舉了幾種二極管正負極的判斷方法，僅供參考。
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芯創(chuàng)天科電子專業(yè)回收，，回收各種進口原裝電子料，歡迎來咨詢價格！
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