This calculator computes the base resistor \( R_b \) for a BJT cascode configuration based on the following equations:
\[ I_c = \frac{V_P}{R_c} \]
\[ I_b = \frac{I_c}{\beta} \]
\[ R_b = \frac{(V_P - V_{BE}) \cdot \beta}{I_c} = \frac{(V_P - V_{BE}) \cdot \beta \cdot R_c}{V_P} \]