Hi everyone, In skywater 130nm pdk, are mismatch coefficients of process parameters such as A_{vth}, A_{\delta_R/R}, A_{\delta_C/C} available? If so, where can we find those mismatch coefficient values?

OpenLane install is failing on M1 MacBook (BTW, I am working in Parallels with ARM64, so I guess this same error would be there for any ARM64-based machine). When I do

make openlane

the following error shows up:

Step 1/25 : FROM openlane-run-base
pull access denied for openlane-run-base, repository does not exist or may require 'docker login': denied: requested access to the resource is denied

If I try to do

make pull-openlane

it fetches the prebuilt docker image, but fails later during

make pdk

with:

[ -d /home/parallels/OpenLane/pdks/sky130A ] && rm -rf /home/parallels/OpenLane/pdks/sky130A || true
docker run --rm -v /home/parallels/OpenLane:/openlane -v /home/parallels/OpenLane/designs:/openlane/install -v /home/parallels/OpenLane/pdks:/home/parallels/OpenLane/pdks -e PDK_ROOT=/home/parallels/OpenLane/pdks -e STD_CELL_LIBRARY=sky130_fd_sc_hd --user 1000:1000 -e DISPLAY=:0 -v /tmp/.X11-unix:/tmp/.X11-unix -v /home/parallels/.Xauthority:/.Xauthority --network host efabless/openlane:0d8d4c187cb6d0af7b221b364caa2908d8cc9843 sh -c "\
	cd /home/parallels/OpenLane/pdks/open_pdks && \
	./configure --enable-sky130-pdk=/home/parallels/OpenLane/pdks/skywater-pdk/libraries ""\
"
WARNING: The requested image's platform (linux/amd64) does not match the detected host platform (linux/arm64/v8) and no specific platform was requested
standard_init_linux.go:228: exec user process caused: exec format error
make: *** [dependencies/pdk.mk:72: build-pdk] Error 1

Hello all I have a question about transistor region of operation in ngspice In the below picture there is a parameter called (Vdsat) is this Vov?

On the xschem_sky130 nfet and pfet symbols, it might be nice if the gate and backgate pins were not at the same y-coordinate, so that in a current mirror with many outputs, the gates of many fets could all be connected together by a single horizontal wire and likewise the backgates could all be connected together with another horizontal wire. (If there are models for nmos inside p-well inside n-well in the substrate, with the wells all brought to pins on the symbol, then ideally each of these pins would be drawn at different y-coordinates.) As changing the symbols would break people's schematics, I'm not sure how it would be best to manage the change - provide them as alternative symbols only for new designs perhaps. Also I think res_generic_po symbol shouldn't have diodes shown on it, if it is a poly resistor.

Hi, I'm getting the an error on step 15 "Running Global Routing Resizer Design Optimizations" while trying to harden my custom user_proj_example with Caravel (please let me know if this question is more relevant for #C01EX4ATEKF). I'm pasting the output of

make user_proj_example

. https://pastebin.com/BE2Vn1MC Please let me know if any other logs are needed. Here's `15-resizer_design.log`: https://pastebin.com/JJAcQNfP

Is there a way to convert ngspice waveform viewer graphs to png, for documentations

Is it possible to use the NCSU Freepdks with FOSS tools like Xschem? I was looking for a Free PDK with around 40nm channel length for an academic project, it was the only one I could find.

@Tim Edwards When I tried to extract a spice file from a hierarchical circuit (integrator_circuit.png), I encountered an error stating, 'cannot read extract file sky130_fd_pr__pfet_01v8_M479BK.ext'. Do you have any suggestions for solving this problem? By the way, I did not encounter the error when performing extraction on a circuit with two inverters (two_inverters.pdf). Also, I have checked that LVS was OK for this two inverter circuit. Thanks in advance.

I installed klayout on ubuntu20 by following cloning the klayout github repo and running the ./build.sh script. The script finds ruby, python3, etc. The installation dies at this point. Any suggestions?

hey all, i'm unable to get

make setup

to work when cloning the

gfmpw-1c

branch (as mentioned here https://efabless.com/gf-180-open-mpw-shuttle-program) it fails with this:

kris@kris-desktop:~/repos/diy-ic/caravel_user_project$ make setup
/bin/sh: 1: cd: can't cd to verilog/dv/cocotb
/bin/sh: 1: cd: can't cd to verilog/dv/cocotb
Makefile:100: warning: undefined variable 'CARAVEL_NAME'
Makefile:101: warning: undefined variable 'CARAVEL_TAG'
Makefile:101: warning: undefined variable 'CARAVEL_REPO'
if [ -d "/home/kris/repos/diy-ic/caravel_user_project/caravel" ]; then\
        echo "Deleting exisiting /home/kris/repos/diy-ic/caravel_user_project/caravel" && \
        rm -rf /home/kris/repos/diy-ic/caravel_user_project/caravel && sleep 2;\
fi
echo "Installing .."
Installing ..
git clone -b   /home/kris/repos/diy-ic/caravel_user_project/caravel --depth=1
fatal: You must specify a repository to clone.

any help would be great, thank you :)