Contents
Chapter 1: Bipolar Junction Transistors (BJT) 12
1.4 BJT physical construction basics. 16
1.6.2 Emitter stabilized biasing. 22
1.6.3 Voltage divider biasing: 24
1.6.4 Dual power supply biasing: 27
1.6.5 Feedback resistor biasing. 29
1.6.6 Constant current source biasing. 31
1.7 AC analysis of BJT circuits. 33
1.8 Basic Amplifiers configurations: 37
1.8.1 Characterizing amplifiers. 38
1.8.2 Common emitter amplifier 40
1.8.3 Common Base amplifier 41
1.8.4 Common Collector (emitter follower) amplifier 42
1.8.5 Resistance reflection: 47
1.9 Practical Discrete BJT amplifiers. 50
1.9.1 Common emitter amplifier 50
1.9.2 Common base amplifier 55
1.9.3 Common collector (emitter follower) amplifier using Constant current source: 57
1.9.4 Common emitter amplifier – with emitter resistance using Constant current source. 59
Chapter 2: Field Effect Transistors (FET) 71
2.4.2 JFET and depletion type MOSFET: 75
2.5.2 Feedback resistor biasing: 79
2.5.3 Voltage divider biasing. 82
2.5.4 Constant current source biasing analysis. 83
2.6 AC analysis of FET circuits. 87
2.7 Basic Amplifiers configurations: 94
2.7.1 Common source amplifier 94
2.7.2 Common Gate amplifier 95
2.7.3 Common Drain (source follower) amplifier 97
2.8 Practical Discrete FET amplifiers. 102
2.8.1 Common source amplifier 102
2.8.2 Common gate amplifier 106
2.8.3 Common drain (source follower) amplifier 109
2.9 MOS output (drain) resistance. 115
Appendix 1: Other FET symbols used in the literature. 118
Chapter 3: Multistage Amplifiers. 120
3.1 Analyzing Multistage Amplifiers. 120
3.1.1 Method 1: Separate Stages. 120
3.1.2 Method 2: Thevenin’s Theorem… 122
3.1.3 Method 3: One circuit 124
3.2 Multi-stage amplifiers examples. 125
3.4 The cascode configuration. 136
Chapter 4: Biasing techniques for integrated circuits. 141
4.3 The cascode configuration: 143
4.3.1 MOSFET cascode configuration: 143
4.3.2 BJT cascode configuration: 147
4.4 Current source load implementation. 151
4.4.1 MOS Current source load. 151
4.4.2 BJT Current source load. 155
4.5 I.C.’s biasing techniques. 158
4.5.1 Current sources (mirrors): 158
4.5.2 Wilson Current Source (mirror): 161
4.5.3 Current steering circuits: 170
Chapter 5: Differential Amplifiers. 173
5.2 DC Analysis of Differential amplifier: 174
5.3 AC Analysis of Differential amplifier 175
5.3.1 Differential Mode – Double ended. 176
5.3.2 Differential Mode – Single ended voltage gain: 178
5.3.5 MOSFET Differential Amplifiers. 187
5.3.6 Input and output impedances: 189
5.4 Differential to single Ended output conversion. 191
Chapter 6: Power Amplifiers. 196
6.2 Series-fed class-A amplifiers: 197
6.3 Transformer coupled class A amplifiers. 201
6.5 Class B Power Amplifiers circuits. 208
6.5.1 Amplifier efficiency: 210
Chapter 7: Power Amplifiers. 217
7.2 Series-fed class-A amplifiers: 218
7.3 Transformer coupled class A amplifiers. 222
7.5 Class B Power Amplifiers circuits. 229
7.5.1 Amplifier efficiency: 231
Chapter 8: Frequency Response. 238
8.2 Low frequency response analysis. 239
8.3 High frequency response: 252
8.3.1 High frequency response of BJT amplifier 254
8.3.2 High frequency response of FET amplifier 257
Chapter 9: Feedback Connections (FB) 260
9.2 Main Feedback properties. 262
9.2.2 Bandwidth extension: 263
9.3.1 Input and Output resistances. 266
9.4 Practical feedback circuits. 274
9.4.1 Series-shunt FB configuration (voltage amplifier): 275
9.4.2 Shunt-series FB configuration (current amplifier) 280
9.4.3 Series-series feedback circuit: 283
9.4.4 Shunt-shunt feedback. 285
9.6 Feedback circuit stability: 291
References and Bibliography. 297