Grundlegendes zur CADENCE Software - Lehrstuhl für ...

To check the new priority, use:
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Because the first statement turns off the Spectre Interactive mode, you might see a small increase in the
startup time before each simulation. This is because a new Spectre process is called for each run as opposed
to Spectre Interactive which uses the same Spectre process.
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You can use a combination of the writefinal and readic statements in the Transient Options form to run a
transient analysis from where you left it.
Consider a situation where you need to run a transient analysis from 0-200n and then from 200n-400n.
Given that the final transient timepoint will be written to a file called ¤¤ and that the same
file would be used as the initial condition for the transient analysis 200n-400n, the steps are as follows:
1. In the Analog Artist window, select Analyses-Choose.
2. In the Choosing Analyses form, select tran and set the stop time to 200n.
3. Click on Options at the bottom of the form. The transient Options form will appear.
4. In the writefinal field, enter ¤¤ and click OK.
5. Run the simulation. The final transient timepoint at 200n is saved to the file ¤¤ . You
can use this file as the initial conditions for the transient analysis 200n-400n.
To run the analysis from 200n-400n, the steps are as follows:
1. In the Transient Analysis form set the stop time to 400n.
2. In the Transient Options form, set start to 200n; readic to ¤¤ and writefinal to ¤¤ .
3. OK the forms and run the simulation. The simulation will run from 200n-400n ¤¤
using
as the initial condition file.
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For information on bsim3v3 models, refer to the Spectre Circuit Simulator Device Model Equations manual
or the Berkeley web page at
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