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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 Current Tolerance

Absolute Current Tolerance

The abstol option controls the absolute part of the current function convergence criterion. The default is 1e-9 Amps or 1nA. When the current values in the circuit are close to zero Amps, the absolute part of the criterion controls the convergence. abstol should be a value that is reasonable given the smallest current that is expected. One possibility is to set abstol equal to the smallest expected current times reltol.

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

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