Шапка

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Часть X2. Дополнительные материалы по биполярным транзисторам

2x.5 Early Effect and Early Voltage 122 2x.5.1 Measuring Early effect 122 2x.5.2 Some Early effect formulas 123 2x.5.3 Consequences of Early effect: Output resistance 124 Maximum single-stage voltage gain; Current-source output impedance

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2x.6 The Sziklai Configuration 126 2x.6.1 Two-transistor “standard” Sziklai 126 2x.6.2 Three-transistor “enhanced” Sziklai 126 2x.6.3 Push-pull output stage: a Sziklai application 128 2x.7 Bipolarity Current Mirrors 129 2x.7.1 A simple high-speed bipolarity current source 129 Reducing input current; Operating at higher voltages 2x.7.2 Precision bipolarity current source with folded cascode 131 2x.8 The Emitter-Input Differential Amplifier 133 2x.8.1 An application: High-current, high-ratio current mirror 133 2x.8.2 Improving the emitter-input differential amplifier 134 2x.9 Transistor Beta versus Collector Current 136 2x.10 Parasitic Oscillations in the Emitter Follower 138 2x. 11 BJT Bandwidth and fT 140 2x.11.1 Transistor amplifiers at high frequencies: first look 140 Reducing the effect of load capacitance 2x.11.2 High-frequency amplifiers: the ac model 140 ac model; Effects of collector voltage and current on transistor capacitances; Low- and high-current regions; SPICE parameters; Comparing SPICE models with measured fT; Wideband micropower BJTs; Collector-base time constant and maximum oscillation frequency 2x.11.3 A high-frequency calculation example 145 2x.12 Two-terminal Negative Resistance Circuit 146 2x.13 If It Quacks Like anInduc&tor... 148 2x.14‘‘Designs by the Masters”: ±20 V, 5 ns, 50 W Amplifier 150 2x.14.1 Output stage block diagram 150 2x. 14.2 Output stage: the full enchilada 150 2x.14.3 Output stage: some fine points 152 2x.14.4 Epilogue: 120 V, 5 A, dc-10 MHz Laboratory Amplifier 152 Circuit details; Output protection; Transistor choices

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