\[V_{TH}=V_{CC}\frac{R_{B2}}{R_{B1}+R_{B2}},\quad R_{TH}=R_{B1}\parallel R_{B2},\quad I_B=\frac{V_{TH}-V_{BE}}{R_{TH}+(\beta+1)R_E},\quad I_C=\beta I_B\]
\[r_\pi=\frac{\beta V_T}{I_C}=\beta r_e'\qquad r_{be}=r_{bb'}+r_\pi=300\,\Omega+\frac{\beta V_T}{I_C}\]
\[r_e'=\frac{V_T}{I_C}\approx\frac{26\text{mV}}{I_C}\qquad r_{bb'}\text{ 固定采用典型值 }300\,\Omega\]
\[A_v=-\frac{\beta R_C}{r_{be}+(\beta+1)R_E}\;\text{(未旁路)}\qquad A_v=-\frac{\beta R_C}{r_{be}}\;\text{(旁路)}\]
\[Z_{in}=R_{B1}\parallel R_{B2}\parallel\left[r_{be}+(\beta+1)R_E\right]\;\text{(未旁路)}\qquad Z_{in}=R_{B1}\parallel R_{B2}\parallel r_{be}\;\text{(旁路)}\]
\[V_{C,\max}=V_{CC}\quad(\text{截止边界})\qquad V_{C,\min}\approx V_{CE(sat)}+V_E\quad(\text{旁路})\]
采用中频近似；频率滑块只改变显示周期，不计算耦合电容与器件高频效应。