This document discusses class B push-pull amplifiers. It includes diagrams of the circuit configuration using two transistors in push-pull. It also includes solutions to numerical problems involving calculating distortion, power output, and efficiency for a class B push-pull amplifier using given transistor characteristics and circuit parameters. References at the end include common electronics textbooks and websites used as sources for the diagrams and information.

1. LARGE SIGNAL
AMPLIFIERS
Vikas R. Gupta
Electronics Engineering,
RCOEM, Nagpur.

2. Class B Push-Pull Amplifier

3. Two Transistors in Push-Pull Configuration
Image Source: Millman’s Electronic Devices and Circuits, 3rd Edition : Jacob Millman, Christos Halkias, Satyabrata Jit, Third Edition, Tata -
McGraw Hill publication 2010.

4. Class B Push-Pull Amplifier
Image Source: Millman’s Electronic Devices and Circuits, 3rd Edition : Jacob Millman, Christos Halkias, Satyabrata Jit, Third Edition, Tata -
McGraw Hill publication 2010.

5. Class B Push-Pull Amplifier
Image Source: Millman’s Electronic Devices and Circuits, 3rd Edition : Jacob Millman, Christos Halkias, Satyabrata Jit, Third Edition, Tata -
McGraw Hill publication 2010.

6. Class B Push-Pull Amplifier
Image Source: Electronic Devices and Circuit Theory, 11th Edition: R. Boylestad, Pearson Education, 2013.

7. Class B Push-Pull Amplifier
Image Source: Electronic Devices and Circuit Theory, 11th Edition: R. Boylestad, Pearson Education, 2013.

8. Class B Push-Pull Amplifier
Image Source: Millman’s Electronic Devices and Circuits, 3rd Edition : Jacob Millman, Christos Halkias, Satyabrata Jit, Third Edition, Tata -
McGraw Hill publication 2010.

9. Class B Push-Pull Amplifier
Image Source: Electronic Devices and Circuit Theory, 11th Edition: R. Boylestad, Pearson Education, 2013.

12. Class B Push-Pull Amplifier
Image Source: http://www.electronics-tutorials.ws/amplifier/class-ab-amplifier.html

13. Class AB Push-Pull Amplifier
Image Source: http://www.electronics-tutorials.ws/amplifier/class-ab-amplifier.html

14. Class AB Push-Pull Amplifier
Image Source: http://www.electronics-tutorials.ws/amplifier/class-ab-amplifier.html

15. Class AB Push-Pull Amplifier
Image Source: http://www.electronics-tutorials.ws/amplifier/class-ab-amplifier.html

16. Class AB Push-Pull Amplifier
Image Source: http://www.electronics-tutorials.ws/amplifier/class-ab-amplifier.html

17. Class AB Push-Pull Amplifier
Image Source: http://www.electronics-tutorials.ws/amplifier/class-ab-amplifier.html

18. NUMERICAL

19. Class B Push-Pull Amplifier
Image Source: Electronic Devices and Circuit Theory, 11th Edition: R. Boylestad, Pearson Education, 2013.

20. Class B Push-Pull Amplifier
Ref.: Electronic Devices and Circuit Theory, 11th Edition: R. Boylestad, Pearson Education, 2013.

21. Class B Push-Pull Amplifier
Ref.: Electronic Devices and Circuit Theory, 11th Edition: R. Boylestad, Pearson Education, 2013.

22. Class B Push-Pull Amplifier
Ref.: Electronic Devices and Circuit Theory, 11th Edition: R. Boylestad, Pearson Education, 2013.

23. Class B Push-Pull Amplifier
16.18) The power transistor whose characteristics are shown in Fig. 16.5 is used in
the class B push-pull circuit shown in figure below, with R2 = 0 and VCC = -20 V. If the
base current is sinusoidal, with a peak value of 20 mA and RL’ = (N1/N2)2RL = 15Ω ,
calculate
a) The third harmonic distortion.
b) The power output
c) The collector circuit efficiency.

24. 16.18) The power transistor whose characteristics are shown in Fig. 16.5 is used in the class B
push-pull circuit shown in figure below, with R2 = 0 and VCC = -20 V. If the base current is
sinusoidal, with a peak value of 20 mA and RL’ = (N1/N2)2RL = 15Ω , calculate
a) The third harmonic distortion.
b) The power output
c) The collector circuit efficiency.
Image Source: Millman’s Electronic Devices and Circuits, 3rd Edition : Jacob Millman, Christos Halkias, Satyabrata Jit, Third Edition, Tata -
McGraw Hill publication 2010.

25. Input Characteristics of a Power Transistor
Image Source: Millman’s Electronic Devices and Circuits, 3rd Edition : Jacob Millman, Christos Halkias, Satyabrata Jit, Third Edition, Tata -
McGraw Hill publication 2010.

26. Output Characteristics of a Power Transistor
Image Source: Millman’s Electronic Devices and Circuits, 3rd Edition : Jacob Millman, Christos Halkias, Satyabrata Jit, Third Edition, Tata -
McGraw Hill publication 2010.
IC(max)
15Ω
IC1/2
Vmin

27. 16.20) The power transistor whose characteristics are shown in Fig. 16.5 is used in the class B push-pull
circuit shown in figure below, with R2 = 0 and VCC = -20 V. If the base current is sinusoidal, with a
peak value of 20 mA and RL’ = (N1/N2)2RL = 15Ω. If the base voltage is sinusoidal, with peak value
of 0.4 V, plot the output collector current. Note the crossover distortion.

28. Solve question no. 16.23 and get a

29. References
 Millman’s Electronic Devices and Circuits, 3rd Edition : Jacob Millman, Christos
Halkias, Satyabrata Jit, Third Edition, Tata - McGraw Hill publication 2010.
 Electronic Devices and Circuit Theory, 11th Edition: R. Boylestad, Pearson Education,
2013.
 http://www.electronics-tutorials.ws/amplifier/class-ab-amplifier.html