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A Guide to Circuit
Simulation and Analysis
Using PSpice® l) 3
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SPICE
A Guide to Circuit
Simulation and Analysis
Using PSpice®
PAUL W. TUINENGA
MicroSim Corporation
PRENTICE HALL, Englewood Cliffs, New Jersey 07632
Contents
PREFACE xiii
INTRODUCTION xv
What Is PSpice? xv
Other SPICE-based Programs xvii
Organization of This Book xviii
1 GETTING STARTED 1
A Small Circuit
Values 4
2 DC OPERATION 6
Passive Devices 6
Names 7
Independent Sources 8
Ohm's Law 9
vii
viii Contents
Kirchhoff'work Laws 9
Capacitors in DC Circuits 11
Inductors in DC Circuits 12
3 DC SENSITIVITY 14
The .SENS Statement 14
DC Sensitivity Analysis 14
Circuit Example: Worst-Case Design 16
4 DCSWEEP 19
Sweeping a Source 19
The .DC Statement 20
Printed Output 20
Plotted Output 22
Linear Controlled Sources 22
Pol ynomial Controlled Sources 24
Graphics Output 26
Multiple-Input Controlled Sources 27
Function Modules 28
Subcircuits 31
5 TRANSFER FUNCTION 33
Small-Signal DC Analysis 33
Circuit Gain 34
Input and Output Resistance 34
The . TF Statement 35
Transfer Function Analysis 35
Linear Example 37
Nonlinear Example 38
Plotting Small-Signal Gain 40
Contents ix
6 FREQUENCY RESPONSE 42 '
Specifying Input Sources 43
The .AC Statement 44
PRINT and PLOT Output 44
Graphics: Bode Plots 45
Plotting Group Delay 48
Values 49
Plotting Input Impedance 51
Plotting Output Impedance 55
Plotting Loop Gain 59
7 FEEDBACK CONTROL ANALYSIS 66
Dynamic Plant Example 66
Bode Plots 68
Inverse-Polar Plots 72
Nichols Plots 74
8 NOI