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g1贴片三极管大概多少钱能买到？谁有报价？

浏览：27次 | 提问时间： 07-22 11:44
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5个答案
被冷 07-22 11:53

1、使三极管工作在饱合或截止状态，从而实现开关作用。
2、三极管，全称应为半导体三极管，也称双极型晶体管、晶体三极管，是一种控制电流的半导体器件·其作用是把微弱信号放大成幅度值较大的电信号，也用作无触点开关。晶体三极管，是半导体基本元器件之一，具有电流放大作用，是电子电路的核心元件。
3、三极管是在一块半导体基片上制作两个相距很近的PN结，两个PN结把整块半导体分成三部分，中间部分是基区，两侧部分是发射区和集电区，排列方式有PNP和NPN两种。希望我的回答能帮到您

鹿海 07-22 12:01

大功率开关三极管型号都有：三极管按结构可以分为，NPN型和PNP型。三极管通时IE

扛 07-22 12:09

（放大倍数+1)*IB但其中与ICB没有任何关系，ICB

恷 07-22 12:17

0ICB>0时，就与三极管就有所关系。随着三极管使用范围的不断广大，使得三极管型号也在不断增多，由于三极管功能和使用场所不同使得三极管型号也有所不同，带电阻的三极管型号有：UN2111V1NNP150MHz50V100mA、UN2112V
2、UN2113V
3、UN2211V
4、UN2212V
5、UN2213V6等。

矢至 07-22 12:26

1、当加在三极管发射结的电压小于PN结的导通电压，基极电流为零，集电极电流和发射极电流都为零，三极管这时失去了电流放大作用，集电极和发射极之间相当于开关的断开状态，即为三极管的截止状态。开关三极管处于截止状态的特征是发射结，集电结均处于反向偏置。
2、当加在三极管发射结的电压大于PN结的导通电压，并且当基极的电流增大到一定程度时，集电极电流不再随着基极电流的增大而增大，而是处于某一定值附近不再怎么变化，此时三极管失去电流放大作用，集电极和发射极之间的电压很小，集电极和发射极之间相当于开关的导通状态，即为三极管的导通状态。开关三极管处于饱和导通状态的特征是发射结，集电结均处于正向偏置。而处于放大状态的三极管的特征是发射结处于正向偏置，集电结处于反向偏置。这也是可以使用电压表测试发射结，集电结的电压值判定三极管工作状况的原理。开关三极管正是基于三极管的开关特性来工作的。希望我的回答能帮到您

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