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Output Stages and Power Amplifiers Chapter Eight McGraw-Hill

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1 Output Stages and Power Amplifiers Chapter Eight McGraw-Hill
Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

2 Figure 8.1 Typical dc beta characteristics (hFE versus lc) for 2N3055
McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

3 Figure 8.3 The safe operating area of a bipolar transistor plotted on: (a) linear scales and (b) logarithmic scales McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

4 Figure 8.7 Typical characteristics for high-power MOSFETs: (a) transconductance versus drain current; (b) transfer characteristics McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

5 Figure 8.8 (a) Cross section of a VMOS device; (b) cross section of DMOS device; (c) HEXFET structure McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

6 Figure 8.15 Collector current versus time characteristics: (a) class-A amplifier, (b) class-B amplifier, (c) class-AB amplifier, and (d) class-C amplifier McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7 Figure 8.16 (a) Common-emitter amplifier, (b) dc load line, and (c) instantaneous power dissipation versus time in the transistor McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

8 Figure 8.20 Crossover distortion of basic complementary push-pull output stage McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

9 Figure 8.23 Bipolar class-AB output stage McGraw-Hill
Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

10 Figure 8.24 Characteristics of a class-AB output stage: (a) voltage transfer curve, (b) sinusoidal input signal, (c) collector currents, and (d) output current McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

11 Figure 8.28 (a) Transformer-coupled common-emitter amplifier and (b) dc and ac load lines McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

12 Figure 8.30 Class-AB output stage with quiescent bias established by diodes McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

13 Figure 8.31 Class-AB output stage with VBE multiplier bias circuit
McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.


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