User Guide

Figures
Figure 1 User-configurable data files that PSpice reads . . . . . . . . . . . . . . . . 11
Figure 2 Diode clipper circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 3 Connection points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 4 PSpice simulation output window. . . . . . . . . . . . . . . . . . . . . . . 22
Figure 5 Simulation output file. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 6 DC sweep analysis settings. . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 7 Probe window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 8 Clipper circuit with voltage marker on net Out. . . . . . . . . . . . . . . . 29
Figure 9 Voltage at In, Mid, and Out. . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 11 Trace legend with cursors activated. . . . . . . . . . . . . . . . . . . . . . 30
Figure 12 Trace legend with V(Mid) symbol outlined. . . . . . . . . . . . . . . . . . 30
Figure 13 Voltage difference at V(In) = 4 volts. . . . . . . . . . . . . . . . . . . . . . 31
Figure 14 Diode clipper circuit with a voltage stimulus. . . . . . . . . . . . . . . . . 32
Figure 15 Stimulus Editor window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 16 Transient analysis simulation settings. . . . . . . . . . . . . . . . . . . . . 34
Figure 17 Sinusoidal input and clipped output waveforms. . . . . . . . . . . . . . . 35
Figure 18 Clipper circuit with AC stimulus. . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 19 AC sweep and noise analysis simulation settings. . . . . . . . . . . . . . . 38
Figure 20 dB magnitude curves for “gain” at Mid and Out. . . . . . . . . . . . . . . 40
Figure 21 Bode plot of clipper’s frequency response. . . . . . . . . . . . . . . . . . . 41
Figure 22 Clipper circuit with global parameter Rval. . . . . . . . . . . . . . . . . . 42
Figure 23 Parametric simulation settings. . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 24 Small signal response as R1 is varied from 100
Ω
to 10 k
Ω . . . . . . . . . . . 45
Figure 25 Small signal frequency response at 100 and 10 k
Ω
input resistance. . . . 47
Figure 26 Performance analysis plots of bandwidth and gain vs. Rval. . . . . . . . . 50
Figure 27 Relationship of the Model Editor to Capture and PSpice . . . . . . . . . . 93
Figure 28 Process and data flow for the Model Editor. . . . . . . . . . . . . . . . . . 96
Figure 29 Model Editor workspace with data for a bipolar transistor. . . . . . . . . 97
Figure 30 Design for a half-wave rectifier. . . . . . . . . . . . . . . . . . . . . . . . 104
Figure 31 Model characteristics and parameter values for DbreakX. . . . . . . . . 105
Figure 32 Assorted device characteristic curves for a diode. . . . . . . . . . . . . . 108
Figure 33 Forward Current device curve at two temperatures. . . . . . . . . . . . 109
Pspug.book Page xv Wednesday, November 11, 1998 1:14 PM