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同学们在学习共基电路时,遇到的第一个困难是觉得电路比较陌生,不好记忆。如果把图1(注1)电路,改画图2形式。就不难看出:它与我们已经学过的,而且相当熟悉的共射电路图3(注2)非常相似。只要把图3所示共射电路中A点接地:把R_sV_s串联在C_s中(B点),就可得到与图2完全相同的共基电路。这就解决了共基电路的记忆问题。同时也解决了它的工作点估算问题。
Students learn a total of basic circuit, the first difficulty encountered is that the circuit is more strange, not good memory. If the Figure 1 (Note 1) circuit, change the picture 2 form. It is not hard to see that it is very similar to the common-mode circuit shown in Figure 3 (note 2), which we have already learned and quite familiar with. As long as the co-beam circuit shown in Figure 3, grounding point A: R_sV_s series in C_s (B point), you can get exactly the same as Figure 2 with the base circuit. This solves the memory problem of the common base circuit. At the same time also solved its operating point estimation problem.