Chapter 13 : Bipolar Junction Transistors 13-0 Introduction 13-1 Current and voltage relationships 13-2 Common –emitter characteristics 13-3 Load –line analysis 13-4 pnp bipolar junction transistors 13-5 Large signal DC circuit models 13-6 Large signal DC analysis 13-7 Small –signal equivalent circuits 13-8 Common –emitter amplifiers 13-9 Emitter followers
13-0 Introduction
Fig. 5-1 General structure of npn BJT
Fig. 5-3 Current flow in a npn BJT
13-1 Current and voltage relationships
Equations of operation
Exercise 13-1
Another example
13-3 Load-line analysis of a common emitter amplifier
Load- line analysis of the amplifier (cont’d)
Example 13-2 : Load-line analysis of a BJT amplifier
Example 13-2 (cont’d)
Fig Circuit symbols for BJT
Fig Voltage polarities and current flow of BJT in the active mode
Fig. 5-2 A general structure of pnp BJT
Fig Current flow in a pnp BJT
Fig. 5-5 Large area equivalent circuit models for npn BJT in the active mode
Fig Early effect
Fig Hybrid Pi model for small signal operation
Fig T model for small signal operation
Fig Hybrid Pi small signal model with r 0
Pi and T model with r 0
The Widlar Current Mirror (p.653)
Another example