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Ansoft Designer / Ansys Designer 在线帮助文档：

Nexxim Simulator >
Nexxim DC Analysis >
   Convergence, Speed, and Accuracy >
       Options that Affect Convergence, Speed, and Accuracy >
           Absolute Voltage Tolerance

Absolute Voltage Tolerance

The vntol option controls the absolute part of the delta voltage convergence criterion. The default is 50e-6 Volts or 50μV. When the reference values are close to zero Volts, the absolute part of the criterion controls the convergence. vntol should be a value that is reasonable given the smallest voltage that is expected. One possibility is to set vntol equal to the smallest expected voltage times reltol.

Like reltol, tightening vntol increases accuracy but may require more NR iterations.

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