当\(\beta R_{E}\geq10R_{2}\)时,我们可以直接用等效电路计算\(V_{B}\):\(\displaystyle V_{B}=\frac{R_{2}V_{CC}}{R_{1}+R_{2}}\)
接下来就可以根据路径
\(\begin{array}{c}V_{B}\\\downarrow\\V_{E}=V_{B}-V_{BE}(0.7V)\\\downarrow\\I_{E}=\displaystyle\frac{V_{E}}{R_{E}}\approx I_{C}\\\downarrow\\V_{CE}=V_{CC}-I_{C}(R_{C}+R_{E})\end{array}\)
求得\(I_{C}\)和\(V_{CE}\).
当\(\beta R_{E}\geq10R_{2}\)时,我们可以直接用等效电路计算\(V_{B}\):\(\displaystyle V_{B}=\frac{R_{2}V_{CC}}{R_{1}+R_{2}}\)
接下来就可以根据路径
\(\begin{array}{c}V_{B}\\\downarrow\\V_{E}=V_{B}-V_{BE}(0.7V)\\\downarrow\\I_{E}=\displaystyle\frac{V_{E}}{R_{E}}\approx I_{C}\\\downarrow\\V_{CE}=V_{CC}-I_{C}(R_{C}+R_{E})\end{array}\)
求得\(I_{C}\)和\(V_{CE}\).
status | not learned | measured difficulty | 37% [default] | last interval [days] | |||
---|---|---|---|---|---|---|---|
repetition number in this series | 0 | memorised on | scheduled repetition | ||||
scheduled repetition interval | last repetition or drill |