7-1 mcgraw-hill copyright © 2001 by the mcgraw-hill companies, inc. all rights reserved. chapter...

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McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. 7-1 Chapter Seven Frequency Response

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Page 1: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-1Chapter Seven

Frequency Response

Page 2: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-2Figure 7.1

Amplifier gain versus frequency

Page 3: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-3Figure 7.16(a) Common-emitter circuit with coupling capacitor and (b) small-signal equivalent circuit

Page 4: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-4Figure 7.17(a) Common-source circuit with output coupling and (b) small-signal equivalent circuit

Page 5: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-5Figure 7.18(a) Emitter-follower circuit with output coupling capacitor and (b) small-signal equivalent circuit

Page 6: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-6

Page 7: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-7Figure 7.20(a) MOSFET common-source circuit with a load capacitor and

(b) small-signal equivalent circuit

Page 8: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-8Figure 7.21PSpice analysis results for the circuit in Figure 7.20(a): (a) voltagegain magnitude response, and (b) phase response

Page 9: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-9Figure 7.22(a) Circuit with both a coupling and a load capacitor and (b) small-signal equivalent circuit

Page 10: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-10Figure 7.23(a) Circuit with emitter bypass capacitor and (b) small-signal equivalent circuit

Page 11: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-11Figure 7.24Bode plot of the voltage gain magnitude for the circuit with an emitter bypass capacitor

Page 12: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-12Figure 7.33Hybrid- equivalent circuit

Page 13: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-13Figure 7.35Bode plots for the short-circuit current gain: (a) magnitude and (b) phase

Page 14: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-14Figure 7.37a(a) Common-emitter circuit with current source input

Page 15: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-15Figure 7.37b(b) small signal equivalent circuit with simplified hybrid- model

Page 16: 7-1 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Chapter Seven Frequency Response

McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-16Figure 7.39

Small-signal equivalent circuit, including the equivalent Miller capacitance