eldo_user

Figure 21-15. Non-inverting Amplifier
Examples
Example 7—Monte Carlo Analysis Basic
Summary of Eldo commands used in this example:
• .MODEL—Model definition.
• .OPTION—Simulator configuration.
• .AC—AC analysis.
• .MC—Monte Carlo analysis.
• .PLOT—Plot simulator results.
Netlist Explanation
.model modres res lot=50% dev=60%
The above line specifies the Monte Carlo parameter limits for resistor model type modres. It
indicates that for each Monte Carlo run the resistor values can change together by as much as
50% (lot tolerance). Additionally, the resistor values are allowed to change independently of
each other by as much as 60% (dev tolerance). As can be seen below, the interval of variations
is more important on the resistor r2 than on r1.
r1 5 3 modres 100k
r2 5 0 modres 1k
c1 3 0 1p
The above lines give the information of the resistors and capacitors that are present in the circuit
to be simulated. Listed is the component name, the nodes between which the component is
connected and the value of the component.
Note
The resistors are also defined to be of model type modres. This is to specify Monte Carlo
parameter limits for the resistors during the simulation runs.
Eldo® User's Manual, 15.3 1291