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Star-Hspice Quick Reference Guide

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Worst Case Analysis<br />

AC Sweep<br />

General Form<br />

TRAN Sweep<br />

General Form<br />

.AC dec 10 100 10meg SWEEP<br />

+ MONTE=val<br />

.TRAN 1n 10n SWEEP MONTE=val<br />

.PARAM Distribution Function Syntax<br />

General Form<br />

Or<br />

Or<br />

Or<br />

Or<br />

abs_variation<br />

AGAUSS<br />

AUNIF<br />

GAUSS<br />

.PARAM xx=UNIF(nominal_val,<br />

+ rel_variation )<br />

.PARAM xx=AUNIF(nominal_val,<br />

+ abs_variation )<br />

.PARAM xx=GAUSS(nominal_val,<br />

+ rel_variation, sigma )<br />

.PARAM xx=AGAUSS(nominal_val,<br />

+ abs_variation, sigma )<br />

.PARAM xx=LIMIT(nominal_val,<br />

+ abs_variation)<br />

The AUNIF and AGAUSS vary the<br />

nominal_val by +/- abs_variation.<br />

Gaussian distribution function using<br />

absolute variation.<br />

Uniform distribution function using<br />

absolute variation.<br />

Gaussian distribution function using relative<br />

variation.<br />

<strong>Star</strong>-<strong>Hspice</strong> <strong>Quick</strong> <strong>Reference</strong> <strong>Guide</strong> 13-17

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