Question 6.5: For the amplifier of Fig. 3-10(a), let vi = 0.25 sin(2000πt)......

For the amplifier of Fig. 3-10(a), let $v_i = 0.25 \sin(2000πt)  \text{V},  V_{CC} = 15  \text{V},  CC_1 = CC_2 = CC = 100  μF,  R_1 = 6  kΩ,  R_2 = 50  kΩ,  R_C = R_L = 1  kΩ$, and $R_i = R_E = 100  Ω$. The transistor is characterized by the model of Problem 5.4. Use SPICE methods to determine the CE hybrid parameters of (6.5) through (6.8) for this transistor at the point of operation.

Input resistance                    ${h_{i e} \equiv \frac{\partial v_{B E}}{\partial i_{B}}\bigg|_{_{Q}} \approx \frac{\Delta v_{B E}}{\Delta i_{B}}\bigg|_{_{Q}}}$          (6.5)

Output admittance                    $h_{o e} \equiv {\frac{\partial i_C}{\partial v_{C E}}}{\bigg|}_{Q} \approx {\frac{\partial\Delta i_{C}}{\Delta v_{C E}}}{\bigg|}_{Q}$          (6.8)