1. Hybrid equivalent model
5.5 The hybrid equivalent model
Approximate model
CE and CB
5.6 Hybrid π model
High frequencies => Chapter 9
5.25 Complete hybrid equivalent model, including RS and RL
Equations to determine: Ai, Av, Zi and Zo

2. 5.5 The hybrid equivalent model
For the hybrid equivalent model the parameters are defined at an operating point that may or may not reflect the actual operating conditions of the amplifier

3. 5.5 The hybrid equivalent model (cont’d)
Short-circuit input-impedance parameter
Open-circuit reverse transfer voltage ratio parameter
Short-circuit forward transfer current ratio parameter
Open-circuit output-admittance parameter

4. 5.5 The hybrid equivalent model (cont’d)

5. 5.5 The hybrid equivalent model (cont’d): CE and CB

6. 5.5 The hybrid equivalent model versus re model

7. 5.5 The hybrid equivalent model versus re model (cont’d)

8. 5.6 Hybrid π model

9. 5.25 Complete hybrid equivalent model

10. 5.25 Complete hybrid equivalent model: Ai

11. 5.25 Complete hybrid equivalent model: Av

12. 5.25 Complete hybrid equivalent model: Zi

13. 5.25 Complete hybrid equivalent model: Zo