eldo_user

Monte Carlo Analysis
Graphical Output
Histogram Annotations
Specify the .HISTOGRAM command to control the measurement annotations displayed by
EZwave.
• SPEC_BOUNDS: controls the plot of lower bound (LBOUND) and upper bound
(UBOUND) cursors and the corresponding yield value. These specification values are
not necessarily entered by users for each extract. It is also possible that only one value is
given. In this case, the other bound must be considered as +/-infinity.
• GAUSS_PDF: controls the plot of the Gaussian PDF that best approximates the data.
This waveform is named Gaussian PDF.
• GAUSS_FIT: controls the plot of 1-sigma, 2-sigma and 3-sigma cursors and their
associated yield values. All three cursors are plotted.
• STAT_LEGEND: controls the presence of the statistical measures legend displayed on
the histogram, which contains for example:
o
o
o
o
o
Size Sample (Samples). The number of MC runs. The nominal run is never used in
computations.
Empirical Mean (Mean)
Standard Deviation (Std. Dev.)
Coefficient of Variation (Coef. of Var.). Note that we actually provide the Relative
Standard Deviation.
Min/Max values (Min/Max)
When the .HISTOGRAM statement is not specified within the netlist, the default annotations
are controlled by EZwave.
Figure 11-16 shows a histogram plotted with the following annotations: Kernel PDF curve,
Coverage intervals (yield percentage) at 1σ, 2σ, 3σ specifications, based on empirical CDF.
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Eldo® User's Manual, 15.3