Fuente TeX:

V_o=\frac{\frac{ V_{cc} - V_{BE2} }{ R_C } + \frac{ \beta_1 V_{BE1} }{ R_1//R_F }+ \frac{ V_{BE1} }{ \left( \beta_2 + 1 \right) R_F }}{\frac{1}{R_C}+\frac{\beta_1}{R_F}+\frac{1}{(\beta_2+1)R_2//R_F}}