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Eldo Premier<br />

Using Eldo Classic DC Solution<br />

Related Topics<br />

Using Eldo Classic DC Solution<br />

Handling Matrix-Like Circuits<br />

Solver Generation Methods<br />

Eldo Premier Selectable Accuracy Option<br />

Netlist Support<br />

Using Eldo Classic DC Solution<br />

To help speed up the DC solution, specify .OPTION PREMIER_FORCE_ELDO_DC. An Eldo<br />

Classic DC solution is computed and saved into a .iic file. Eldo Premier is then activated and<br />

uses this DC solution to run the simulation.<br />

This option can be specified by default by placing it inside the <strong>eldo</strong>.ini file, see “Eldo<br />

Initialization File” on page 51. It has no effect if a .USE or .RESTART command is present in<br />

the netlist.<br />

By default, if Eldo Premier finds an existing .iic file, generated during a previous run of the<br />

same netlist, then it will reuse it. To force Eldo Premier to recompute the DC solution and<br />

regenerate the .iic file, specify: .OPTION PREMIER_REUSE_AUTOSAVED_IIC_FILE=0.<br />

To save the DC results in the .wdb file, specify the following commands in your netlist:<br />

.PROBE DC ALL<br />

By default when .OPTION PREMIER_FORCE_ELDO_DC is active, Eldo Premier uses the<br />

DC computed by Eldo Classic as .NODESET commands and performs the .TRAN command as<br />

specified in the netlist. To force Eldo Premier to use the DC computed by Eldo Classic as .IC<br />

commands and perform a .TRAN UIC command, specify<br />

.OPTION PREMIER_USE_IC_TRAN_UIC=1.<br />

Tip<br />

See also “Eldo Premier Options” in the Eldo Reference Manual.<br />

Limitations<br />

Using the Eldo Classic DC solution in Eldo Premier is not supported for the following:<br />

• .TEMP commands in Questa ADMS Premier: a warning message is displayed and the<br />

simulation is run for only the first temperature.<br />

• .STEP, .ALTER, and .MPRUN commands.<br />

• Eldo Control Language.<br />

66<br />

Eldo® User's Manual, 15.3

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