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

7-2 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 7.1 Amplifier gain versus frequency

7-3 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 7.16 (a) Common-emitter circuit with coupling capacitor and (b) small-signal equivalent circuit

7-4 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 7.17 (a) Common-source circuit with output coupling and (b) small-signal equivalent circuit

7-5 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 7.18 (a) Emitter-follower circuit with output coupling capacitor and (b) small-signal equivalent circuit

7-6 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved.

7-7 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 7.20 (a) MOSFET common-source circuit with a load capacitor and (b) small-signal equivalent circuit

7-8 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 7.21 PSpice analysis results for the circuit in Figure 7.20(a): (a) voltage gain magnitude response, and (b) phase response

7-9 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 7.22 (a) Circuit with both a coupling and a load capacitor and (b) small-signal equivalent circuit

7-10 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 7.23 (a) Circuit with emitter bypass capacitor and (b) small-signal equivalent circuit

7-11 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 7.24 Bode plot of the voltage gain magnitude for the circuit with an emitter bypass capacitor

7-12 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 7.33 Hybrid-  equivalent circuit

7-13 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 7.35 Bode plots for the short-circuit current gain: (a) magnitude and (b) phase

7-14 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 7.37a (a) Common-emitter circuit with current source input

7-15 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 7.37b (b) small signal equivalent circuit with simplified hybrid-  model

7-16 McGraw-Hill Copyright © 2001 by the McGraw-Hill Companies, Inc. All rights reserved. Figure 7.39 Small-signal equivalent circuit, including the equivalent Miller capacitance