Chapter Twelve 12 1 Feedback and Stability Mc
Chapter Twelve 12 -1 Feedback and Stability Mc. Graw-Hill Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
Figure 12. 1 12 -2 Basic configuration of a feedback amplifier Mc. Graw-Hill Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
Figure 12. 5 12 -3 Basic feedback connections Mc. Graw-Hill Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
12 -4 Mc. Graw-Hill Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
Figure 12. 16 12 -5 Example of an op-amp series-shunt feedback circuit Mc. Graw-Hill Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
Figure 12. 18 Discrete transistor series-shunt feedback circuits: 12 -6 (a) emitter-follower, (b) source-follower, and (c) small-signal equivalent circuit of emitter-follower Mc. Graw-Hill Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
Figure 12. 20 12 -7 Example of an op-amp shunt-series feedback circuit Mc. Graw-Hill Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
Figure 12. 22 (a) Equivalent circuit for simple common-base circuit and (b) reconfigured circuit Mc. Graw-Hill 12 -8 Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
Figure 12. 27 Example of an op-amp series-series feedback circuit 12 -9 Mc. Graw-Hill Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
Figure 12. 29 Example of a discrete transistor series-series feedback circuit Mc. Graw-Hill 12 -10 Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
Figure 12. 33 Example of an op-amp shunt-shunt feedback circuit Mc. Graw-Hill 12 -11 Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
Figure 12. 35 Example of a discrete transistor shunt-shunt feedback circuit Mc. Graw-Hill 12 -12 Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
Figure 12. 44 (a) Basic feedback network, showing amplifier input resistance and (b) feedback network after the loop is broken, showing test voltage and load resistance Mc. Graw-Hill 12 -13 Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
Figure 12. 45 (a) Feedback circuit prior to breaking the loop and (b) small-signal equivalent circuit after breaking the loop Mc. Graw-Hill 12 -14 Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
Figure 12. 56 Nyquist plot, loop gain for three-stage amplifier, for: (a) stable system and (b) unstable system Mc. Graw-Hill 12 -15 Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
Figure 12. 57 Bode plots of loop gain of function described in Example 12. 19, for two values of feedback transfer function: (a) magnitude and (b) phase Mc. Graw-Hill 12 -16 Copyright © 2001 by the Mc. Graw-Hill Companies, Inc. All rights reserved.
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