1. 11-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Eleven Differential and Multistage Amplifiers

2. 11-2 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.2 Basic BJT differential-pair configuration

3. 11-3 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.3 Basic diff-amp with applied common-mode voltage and (b) basic diff-amp with applied differential- mode voltage

4. 11-4 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.7 (a) Equivalent ac circuit, diff-amp with differential-mode input signal and two-sided output voltage and (b) ac equivalent circuit with one- sided output

5. 11-5 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.8 Small-signal equivalent circuit, bipolar differential amplifier

6. 11-6 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.12 (a) Equivalent ac circuit, diff-amp with applied sinusoidal differential-mode input signal, and resulting signal current directions and (b) differential-mode half-circuits

7. 11-7 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.13 (a) Equivalent ac circuit of diff-amp with common-mode input signal, and resulting signal current directions and (b) common-mode half circuits

8. 11-8 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.22 AC equivalent circuit, MOSFET differential amplifier

9. 11-9 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.23 Small-signal equivalent circuit, MOSFET differential amplifier

10. 11-10 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.24 MOSFET cascode current source

11. 11-11 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.28 BJT differential amplifier with active load

12. 11-12 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.30 BJT differential amplifier with three-transistor active load, showing the signal currents

13. 11-13 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.31 (a) Small-signal equivalent circuit BJT differential amplifier with active load and (b) rearrangement of small-signal equivalent circuit

14. 11-14 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.33 The ac equivalent circuit, MOSFET differential amplifier with active load

15. 11-15 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.34 (a) Small-signal equivalent circuit, MOSFET differential amplifier with active load and (b) rearranged small-signal equivalent circuit

16. 11-16 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.37 A MOSFET cascode diff-amp with a cascode diff-amp

17. 11-17 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 11.46 BJT diff-amp with three-transistor active load, Darlington pair gain stage, and simple emitter-follower output stage