Transcript Chapter Five Useful Ckt Anal

Chapter 5
Useful Circuit Analysis
Techniques
Fig. 5.1
A circuit with two independent current sources.
Fig. 5.2
(a) A voltage source set to zero acts like a short circuit…
User Note:
Fig. 5.3
Circuit from Example 5.1 (Superposition Example).
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Fig. 5.6
Circuit from Example 5.3 (Superposition Example).
Fig. 5.13
(and 5.14) Practical sources.
Fig. 5.21
(a) A complex network including a load resistor RL.
Fig. 5.22
Figs. from Example 5.6 (Thévenin/ Norton Equivalents).
Fig. 5.30
Circuit from Example 5.10.
Engineering Circuit Analysis Sixth Edition
W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin
Copyright © 2002 McGraw-Hill, Inc. All Rights Reserved.
A circuit with two
independent current
sources.
W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition.
Copyright ©2002 McGraw-Hill. All rights reserved.
(a) A voltage source set to
zero acts like a short
circuit. (b) A current
source set to zero acts like
an open circuit.
W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition.
Copyright ©2002 McGraw-Hill. All rights reserved.
Use superposition to find the current ix.
W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition.
Copyright ©2002 McGraw-Hill. All rights reserved.
Use superposition to find the current ix.
W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition.
Copyright ©2002 McGraw-Hill. All rights reserved.
(a) A general practical voltage source
connected to a load resistor RL. (b) The
terminal characteristics compared to an
ideal source.
(a) A general practical current source
connected to a load resistor RL. (b) The
terminal characteristics compared to an
ideal source.
W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition.
Copyright ©2002 McGraw-Hill. All rights reserved.
Source Transformations
Vs
IL 
Rs  RL
Rs
IL 
Is
Rs  RL
Vs
Rs

I s  Vs  I s Rs
Rs  RL Rs  RL
If Vs  I s Rs the two practical sources have exactly the same
effect on the load resistor RL .
(a) A complex network including a load resistor RL. (b) A Thévenin
equivalent network connected to RL. (c) A Norton equivalent network
connected to RL.
W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition.
Copyright ©2002 McGraw-Hill. All rights reserved.
Determine the Thévenin and Norton Equivalents of Network A in (a).
W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition.
Copyright ©2002 McGraw-Hill. All rights reserved.
Find the Thévenin equivalent of the circuit shown in (a).
W.H. Hayt, Jr., J.E. Kemmerly, S.M. Durbin, Engineering Circuit Analysis, Sixth Edition.
Copyright ©2002 McGraw-Hill. All rights reserved.