5-1 Introduction5-2 Biasing and Bias Stability5-2-1 Circuit Configurations5-2-2 Stabilization Against Variations in ICO, VBE and β5-3 Calculation of Stability Factors5-3-1 Stability Factor S5-3-2 Stability Factor S'5-3-3 Stability Factor S''5-3-4 General Remarks on Collector Current Stability5-4 CE, CB Modes and Their Properties5-4-1 Common-Emitter (CE) Mode5-4-2 Common-Base Mode5-5 Small-Signal Low-Frequency Operation of Transistors5-5-1 Hybrid Parameters and Two-Port Network5-6 Equivalent Circuits Through Hybrid Parameters as a Two-Port Network5-7 Transistor as Amplifier5-7-1 The Parameter α'5-8 Expressions of Current Gain, Input Resistance, Voltage Gain and Output Resistance5-8-1 Current Gain (AI)5-8-2 Input Resistance (RI)5-8-3 Voltage Gain (Av)5-8-4 Output Resistance (RO)5-9 Frequency Response for CE Amplifier with and without Source Impedance5-9-1 Conclusions5-10 Emitter Follower5-11 Darlington Pair5-12 Transistor at High Frequencies5-13 Real-Life Applications of the Transistor