I'm having an issue when trying to make caravel user_project_wrapper during Detailed Routing.

[ERROR DRT-0305] Net one_ of signal type POWER is not routable by TritonRoute. Move to special nets.

Error: droute.tcl, 46 DRT-0305

child process exited abnormally

What could be causing this error?

Hi @Mitch Bailey, I'm attempting to make a simple inverter to get familiar with the opensource workflow but getting stucked with LVS. Current situation is the circuits and netlists match but the subcircuit pins does not. The columns under the subcircuit pins has another duplicate of pin names while the other has no matching pin. The layout spice file is generated with ext2spice hierarchy on. I'm not sure whether I'm doing LVS correctly nor how to correct it. Please find the Netgen LVS output, comp.out, spice files for inverter layout(CMOS_INV) and schematic (INV_VP_VN) in the attachment. Thanks in advance!

Hello everyone. How can I simulate Noise figure and OIp3 with NgSpice?

The sky130A.lydrc in open_pdks cannot be used in batch mode for klayout when I use the following command:

klayout -b -rd input=my_layout.gds -rd report=sky130_drc.txt -r drc_sky130.drc

The drc_sky130.drc is renamed from sky130A.lydrc. It reports a series syntax errors due to the header of the XML, So I commented them out, and there are other syntax error derived from XML, such as

&

symbol. Should I just replace those symbol with plain text symbol

&

or there is other dedicated file for running klayout in batch mode? @Tim Edwards

Hi, are custom devices allowed on the skywater pdk such as photodiodes? I understand it probably won't be extracted properly in the ext2spice commands, but is it still able to be fabricated if we follow the design rules for sizing of the individual layers? Thanks!

Hmm, does anyone have had experience with dealing with errors of the type

[ERROR]: There are illegal overlaps (e.g., routes over obstructions) in your design.

[ERROR]: See /path/to/project/openlane/user_project_wrapper/runs/user_project_wrapper/logs/finishing/27-ext2spice.feedback.txt for more.

at the last steps of the overall hardening flow (for the wrapper)? The said file contains many lines of the following form:

box 80124 41296 80875 41347

feedback add "Illegal overlap between obsm1 and metal1 (types do not connect)" medium

When looking at the generated gds file in klayout, depending on the unit used in that the feedback.txt file, either there is nothing at that place, or the position is inside an SRAM macro. What would make sense to look for for fixing the problem(s)?

Hi All, When I use klayout to open def file with lef file, I find it cannot displayed the lef cell information correctly. Do you know how to fix this issue? @User

Please, how can I install or add model files in "xschem" library ? tt_models.sym ff_models.sym ss_models.sym fs_models.sym sf_models.sym

So what would be the best way to learn to be efficient in magic ? Are the few tutorials still the way to go ? (last time I checked them out some keyboard shortcuts seemed not to work, I guess changed since then)

What is going on with efabless, I got a strange email from Jeff DiCorpo, was his account hacked? Any details that can be shared here? You guys from Efabless are doing a great job, wishing you a all the best.