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三极管电压计算问题

2025-03-16 21:23:01

推荐回答（1个）

回答1：

先求三极管的放大倍数：Ib=（12v-Vbe）/280K≈0.0407mA
β=(Ie/Ib)-1=(2.048/0.0407)-1≈50
再求放大后的集电极交流电流：ic=β*ib=50*10.485μA≈524μA=0.524mA
交流负载是Rc与RL并联即1.5K
交流输出电压： UL=0.524mA*1.5K=786mV 即XMM3测得的783.71mV

由于C2隔断了直流，XMM3的直流电压为零。

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