eldo_user

Troubleshooting
Tips for Troubleshooting and/or Improving Convergence and Performance
defining its voltage as 0V, but instead, define its voltage value to be very small.
Moreover, currents through components may be measured directly, therefore, the use of
voltage sources as current probes is not necessary.
• Correct Model Name Syntax.
The first character of a model name cannot be a number. This causes the compilation of
the netlist to be interrupted, and an error message to be displayed.
• Unknown Model Parameter.
When defining model parameter values, care must be taken to ensure that the parameter
is spelt correctly and that it is indeed a legal parameter of the device.
• Ground (0) Node.
A 0 node (ground) must always be present in the input netlist.
Note
Eldo does not recognize GND as GROUND!
• Reserved Keywords.
Some keywords should not be specified in a .PARAM command. If they are then errors
will be generated. See .PARAM in the Eldo Reference Manual.
Tips for Troubleshooting and/or Improving
Convergence and Performance
This topic collects together a number of techniques for improving convergence and/or
simulation performance.
• Operating Point Calculation.
See “Improving DC Convergence” on page 211 and “DC Convergence
Troubleshooting” on page 213.
• Saving, Using, and Restarting Simulations.
See “Improving DC Convergence” on page 211.
Tips for Troubleshooting Performance
Bottlenecks
To help you understand why a circuit does not behave as expected, or takes more time than
expected to simulate, a set of diagnostics are available.
See “Diagnosing Convergence and Performance Issues” on page 377.
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Eldo® User's Manual, 15.3