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Optimization<br />

Optimization of Sweep Simulations<br />

.DATA DATA_SWEEP ALPHA BETA<br />

+ ALPHA1 BETA1<br />

+ ALPHA2 BETA1<br />

*...<br />

+ ALPHAM BETA1<br />

+ ALPHA1 BETA2<br />

*...<br />

+ ALPHAM BETA2<br />

*...<br />

+ ALPHAM BETAP<br />

.ENDDATA<br />

• A DC data-driven analysis:<br />

.DC DATA=DATA_SWEEP<br />

• Transient and frequency analyses. The time and frequency parameters are denoted by<br />

the symbol ω.<br />

A design objective F can be represented as a family of real-valued functions of variables x. This<br />

family is parameterized with points that were denoted by A, T, K, α, β, ..., ω.<br />

The parameter ω is the inner-most parameter and the .ALTER label A is the outer-most<br />

parameter.<br />

This convention aims to fit with the order of the simulations. The simulator provides this<br />

hierarchy to the optimizer for specifying the depth of a design parameter. It is used in printing<br />

routines and in optimization algorithms.<br />

You can change the depth of a design parameter defined in a .STEP PARAM or .STEP TEMP<br />

command. Refer to “Inner and Outer Sweep Parameters” on page 634 for more information.<br />

When at the same hierarchical level, the order of precedence of the design parameters is defined<br />

by the simulator. For example, when the netlist contains the following statements, the parameter<br />

α will be the outer-most and β the inner-most:<br />

.STEP PARAM ALPHA <br />

.STEP PARAM BETA <br />

Related Topics<br />

Inner and Outer Sweep Parameters<br />

Specifying Outer Design Parameters<br />

638<br />

Eldo® User's Manual, 15.3

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