PSpice User Guide

PSpice User Guide

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PSpice User Guide Convergence and "time step too small errors" October 2019 853 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. generated. Once a convergence error is generated, you can revert one step to get the solution. ■ Set the DIGSTEPBACK option .OPTIONS DIGSTEPBACK Setting this option might prove useful in cases where your have convergence problems in a circuits with digital components and you are trying to converge using Solver 1. Though setting DIGSTEPBACK option might work, it is recommended that you should use solver 0 simulation algorithm to obtain a solution. Tip Solver 1 and Solver 0 are two matrix solving algorithms used by PSpice. By default, Solver 1 that has better convergence property, is used. But at times, for a circuit with convergence problems changing the simulation algorithm to Solver 0 helps. To change the simulation algorithm from Solver 1 to Solver 0, open the circuit in the schematic editor. From the PSpice menu choose Edit Simulation Profile. In the Simulation Settings dialog box, select the Options tab. Select the General node of the Analog Advanced tree in the Options button. Change the Simulation algorithm (SOLVER) from default to 0. Note: For more information on all PSpice options, refer to the .OPTIONS(analysis options) section in PSpice Reference Guide.

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