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3.9 Graphics Functions 341
Restrict the phase to the
interval ∘ ∘ .
In[16]:= BodePlot[H1[I w]^5, {w, 0.01, 100}, UnwrapPhase −> False]
Magnitude (dB)
0
-50
-100
-150
-200
1.0E-2 1.0E-1 1.0E0 1.0E1 1.0E2
Frequency
Phase (deg)
0
-50
-100
-150
-200
-250
-300
-350
1.0E-2 1.0E-1 1.0E0 1.0E1 1.0E2
Frequency
Out[16]= Graphics
Unwrap the phase trace.
In[17]:= BodePlot[H1[I w]^5, {w, 0.01, 100}, UnwrapPhase −> True]
Magnitude (dB)
0
-50
-100
-150
-200
1.0E-2 1.0E-1 1.0E0 1.0E1 1.0E2
Frequency
0
Phase (deg)
-100
-200
-300
-400
1.0E-2 1.0E-1 1.0E0 1.0E1 1.0E2
Frequency
Out[17]= Graphics
In the following example, the number of plot points is reduced so that the differences between
successive phase values become too large for phase unwrapping.