eldo_user

Monte Carlo Analysis
Parameter Naming Conventions
* ICARLO example
.MODEL C CAP DEV=20%
.MODEL R RES LOT=20% DEV=5%
.MC 5 ALL
V1 VIN 0 AC=1 DC=1
R1 VIN A R 1k
C1 A 0 C 10P
.TRAN 20ns 20ns
.PROBE V
.EXTRACT tran file=test_out label=maxA max(v(A))
.EXTRACT tran file=icarlo_out {1+ICARLO}
.end
This will generate the following results in the icarlo_out file:
TITLE * ICARLO example
EXTRACT for TRANSIENT ANALYSIS
TEMPERATURE = 2.7000E+01 Celsius
ICARLO = 0
*{1+ICARLO} = 1.0000E+00
TITLE * ICARLO example
EXTRACT for TRANSIENT ANALYSIS
TEMPERATURE = 2.7000E+01 Celsius
ICARLO = 1
*{1+ICARLO} = 2.0000E+00
...
Related Topics
Monte Carlo Analysis Examples
Example 17—Monte Carlo Sensitivity of a Two-Stage Operational Amplifier
Parameter Naming Conventions
This topic describes the naming conventions for the identification of statistical parameters. It is
necessary to use these conventions in a sensitivity analysis to identify the significant circuit
parameters.
As an example, if X is a uniform random variable defined on the interval [−1, 1] then the
variable Y = function(X) is a dependent variable obtained by simulating the uniform variable
and applying a given transformation. The following example models a voltage dependent
resistor, with a linear dependence with respect to the uniform random variable RSH,
.PARAM W=1U L=1U
.PARAM RSH=AUNIF(1K,100,1)
.PARAM B1=-0.4 B2=8U
R1 A B ’RSH*L/W*(1+B1*(TANH(B2*ABS(V(A,B)/L))))’
In this section, the RC Wire model is used to demonstrate the effect of various formulations that
combine local and global variations. The LEVEL parameter is set to LEVEL=3 for the RC wire
model. The expression of the wire resistance is given by:
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Eldo® User's Manual, 15.3