Parameters and their Configuration Variables¶

These are the parameters available in CACE. Use their IDs to specify the parameters in the datasheet.

Configuration variables are used to configure the behavior of the parameters.

KLayout¶

Antenna check (KLayout)¶

ID: KLayout.AntennaCheck

Run antenna check using KLayout to find antenna violations in the layout.

Configuration Variables¶

Variable Name	Type	Description	Default
`jobs`	int	Number of jobs (threads) to use in parallel.	`1`
`args`	List[str]?	Additional arguments.	`None`
`drc_script_path`	Path?	Optional path to a custom KLayout antenna script..	`None`

Results¶

Variable Name	Type	Description
`antenna_violations`	Any	The number of antenna violations.

Design Rule Check (KLayout)¶

ID: KLayout.DRC

Run DRC using KLayout.

Configuration Variables¶

Variable Name	Type	Description	Default
`jobs`	(int｜ ’max’)	Number of jobs to run in parallel.	`1`
`args`	List[str]?	Additional arguments. For example `['-rd', 'variable=value']`.	`None`
`drc_script_path`	Path?	Path to a custom KLayout DRC script. If not specified, the PDK DRC deck is used.	`None`

Results¶

Variable Name	Type	Description
`drc_errors`	Any	The number of DRC errors.

Layout Versus Schematic (KLayout)¶

ID: KLayout.LVS

Run LVS using KLayout.

Configuration Variables¶

Variable Name	Type	Description	Default
`args`	List[str]?	Additional arguments. For example `['-rd', 'variable=value']`.	`None`
`script`	Path?	Custom LVS script relative to `scripts/`.	`None`

Results¶

Variable Name	Type	Description
`lvs_errors`	Any	The number of LVS errors.

Magic¶

Antenna check (Magic)¶

ID: Magic.AntennaCheck

Run antenna check using magic to find antenna violations in the layout.

Configuration Variables¶

Variable Name	Type	Description	Default
`args`	List[str]?	Additional arguments.	`None`
`gds_flatten`	bool	Flatten the GDS before running the check.	`False`

Results¶

Variable Name	Type	Description
`antenna_violations`	Any	The number of antenna violations.

Design Rule Check (Magic)¶

ID: Magic.DRC

Run DRC using magic.

Configuration Variables¶

Variable Name	Type	Description	Default
`args`	List[str]?	Additional arguments.	`None`
`gds_flatten`	bool	Flatten the GDS before running the check.	`False`

Results¶

Variable Name	Type	Description
`drc_errors`	Any	The number of DRC errors.

Get area, width and height (Magic)¶

ID: Magic.Geometry

Take measurements of the layout geometry using magic.

Configuration Variables¶

Variable Name	Type	Description	Default
`args`	List[str]?	Additional arguments.	`None`

Results¶

Variable Name	Type	Description	Units
`area`	Any	The area of the layout.	μm²
`width`	Any	The width of the layout.	μm
`height`	Any	The height of the layout.	μm

Netgen¶

Layout Versus Schematic (Netgen)¶

ID: Netgen.LVS

Run LVS using netgen.

Note

The netgen_lvs tool always compares the schematic netlist with the layout extracted netlist, independent of the selected netlist source.

Configuration Variables¶

Variable Name	Type	Description	Default
`args`	List[str]?	Additional arguments.	`None`
`script`	Path?	Custom netgen LVS script located relative to `scripts/`.	`None`

Results¶

Variable Name	Type	Description
`lvs_errors`	Any	The number of LVS errors.

Ngspice¶

Simulation (Ngspice)¶

ID: Ngspice.Simulation

Run simulations using ngspice.

Results: The results depend on the variables and, optionally, the script_variables configuration variables.

Configuration Variables¶

Variable Name	Type	Description	Default
`jobs`	(int｜ ’max’)	Number of jobs to run in parallel. Make sure to set `num_threads` to `CACE{jobs}` in the template testbench.	`1`
`template`	Path	The template testbench under the `templates/` folder.	`None`
`collate`	str?	Merge runs with the same conditions but different iterations. Used to collate results for plotting Monte Carlo simulations.	`None`
`format`	‘ascii’	Output format of the testbench simulation result file. Currently only `ascii` is supported.	`ascii`
`suffix`	str	Suffix of the testbench simulation result file.	`.data`
`variables`	List[str?]	The results inside the simulation result file. Use `null` to ignore a column.	`None`
`script`	Path?	Postprocessing using user-defined Python script relative to `scripts/`. It will be executed on the results of each simulation. Note: This is experimental and the API might still change.	`None`
`script_variables`	List[str?]?	Results generated by the user-defined Python script. These results are available in addition to the ones specified under `variables`.	`None`
`spiceinit_path`	Path?	Path to a spiceinit file that is copied to the simulation directory and renamed to `.spiceinit`. If not specified, the PDK spiceinit is used.	`None`

Misc¶

If you’re missing a tool or functionality, please open an issue here.