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Simulators >> Circuit Simulators >> [hspice] .measure'd values in analysis in the same file
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Message started by samba-r on Apr 30^th, 2009, 9:59am

Title: [hspice] .measure'd values in analysis in the same file
Post by samba-r on Apr 30^th, 2009, 9:59am

Hi, I've traced many manuals and examples but I can't get nor the direct answer, nor a useful example for the following question for HSPICE: can one use .measure'd values in an analysis in the same file.

For example, I want to find the operating point for a device (linear region on its transfer function), i.e. a neighbourhood around the input voltage where the derivative of the output voltage is at its maximum.
Then I want e.g. to do another analysis around that point, that is I need to use the found input voltage value as a parameter of the analysis directive.
Then I want e.g. to do AC analysis at that operating point. For that reason I supposingly need to shift the input voltage source by the found value of the input voltage, that is I need to use the found value as a parameter in the voltage source expression.

Is it possible to do all these things automatically, i.e. without one's own intervention and cnanging the netlist?

Thanks in advance,
samba

Title: Re: [hspice] .measure'd values in analysis in the same file
Post by spiceoracle on May 7^th, 2009, 3:34pm

.MEASURE statements is a post processing function and the results cannot be used in the same simulation.

Forgive me if I'm not understanding what you want to do correctly, but this sounds similar to an optimization and you might want to consider setting up an optimization.