Chapter 4 Bipolar Junction Transistors Basic operation of the npn bipolar junction Transistor s Load-Line analysis of a Common-Emitter Amplifier E'a The pnp bipolar Junction Transistor a Large-Signal dc circuit models Large-Signal dC analysis of B T circuits a Small-Signal equivalent Circuits The common-Emitter Amplifier ■ The emitter follower The bjt as a Digital logic switch 944rz Professor Rui-Xiang Yin, School of Electronic and Information Engineering, South China University of Technology 021-2-26 Page 6E le c tr o n i c s — Co n te n ts Professor Rui-Xiang Yin, School of Electronic and Information Engineering, South China University of Technology 2021-2-26 Page 6 n Basic Operation of the npn Bipolar Junction Transistor n Load-Line Analysis of a Common-Emitter Amplifier n The pnp Bipolar Junction Transistor n Large-Signal DC Circuit Models n Large-Signal DC Analysis of BJT Circuits n Small-Signal Equivalent Circuits n The Common-Emitter Amplifier n The Emitter Follower n The BJT as a Digital Logic Switch