After reading sections 8.3 and 8.4, you should be able to answer to the following questions.

1. What is the Miller effect?
2. What are the equations for the effective input and output impedances of an amplifier with feedback (Eq. 8.36, 8.37) and how they are derived?
3. Follow the derivation in the Example 8.5 and see how the input impedance of the circuit depends on the load.
4. What is the approximation which is typically made to simplify high frequency analysis of amplifiers (P.508 top paragraph)?
5. What is the r_p-b model for BJT? In this model, which parameters are material/device dependent and which ones depend on the DC bias of the transistor?
6. When the hybrid parameters are used? check the correct answers:

(a) Apply only to BJT. (b) Can be used for any two port circuit. (c) Valid in small signal condition
7. What is the Hybrid-p model for BJT (Fig. 8.29)? When this is used? Describe the physical meaning of each element in this model.
8. What is the transition frequency?