eldo_user

Examples
Example 17—Monte Carlo Sensitivity of a Two-Stage Operational Amplifier
• .MC—Monte Carlo analysis.
• .EXTRACT—Extract characteristics from the simulator results.
• .PLOT—Plot simulator results.
Netlist Explanation
.EXTRACT AC LABEL=MAX MAX(VDB(OUT))
.EXTRACT AC LABEL=BW 'CROSSING(VDB(OUT), -3) / 10E6'
.PLOT AC VDB(OUT)
.EXTRACT DC LABEL=IVDD I(VDD)
The above lines specify the outputs. The output metrics are the maximum value of the closed
loop response, the -3dB bandwidth, and the power consumption. The Monte Carlo sensitivity
analysis enables understanding which statistical parameters are impacting these output
quantities, and which ones are not. The different metrics are not necessarily affected by the
same statistical variables, so Eldo provides one table per metric.
.MC 1000
The Monte Carlo analysis is run with NRUN=1000 to obtain very accurate estimations of the
sensitivity indices Si. Results are extracted for the IVDD extract.
1310
Eldo® User's Manual, 15.3