Hi All, I am using the open PDK sky130 tech file for magic which I have linked to my install path using ln -s, When I invoke #magic with #sky130 (magic -T sky130) I get quite a few warnings (Picture attached) Magic does have access to sky130 when I try to layout my designs but I keep seeing a repetition of these pink warnings at most of the steps which are really annoying. Any ideas on how to fix this? #ieee-sscs-dc-22

Hello All, I was trying to simulate our design using SPICE. I needed the model files for NMOS and PMOS of skywater 130 nm pdk. I searched the website and it says that the model files for the SPICE is ready to use but upon checking the git hub open source I could not manage to get those model files. I would really appreciate anyone of you helping me to get those model files for PMOS and NMOS. Thanks in advance!!

Hi, I have designed a 3-stage ring oscillator using CMOS inverters both in LTSpice and Xschem+Ngspice, when I measure the frequency of their outputs, the LTspice waveform gives me around 18.89GHz whereas the one designed using Xschem+Ngspice gives me 14.8GHz; I am using the same device sizes, same supply voltage, same time step (ik LTspice has dynamic step size but I have set max to the same as ngspice). I am guessing, such a difference in results is not normal. I am using a free 32nm predictive model file. It should also be noted that there is difference in the max voltage these oscillators are attaining, in ngspice they can reach around 980mV but in LTspice, they are getting to around 945mV

What open source lithography (simulation, OPC, etc.) tools do people know of? I'm only aware of this one which is kind-of open source (research only, must request access to code): https://www.cerc.utexas.edu/utda/download/ELIAS/index.html

Hi, I am getting this LVS mismatch issue for unmatched pins. I don't know if this is a valid problem as all the pins are there, just the order doesn't match.

<!channel>: Quickie challenge Per the discussion above (Friday, May 17) between Troy Benjegerdes, Bora Nikolic, and me: Putting my money where my mouth is, as the saying goes. I will personally offer one free TinyTapeout slot to the first person unrelated to Berkeley and BAG development who can install all the tools as described and produce and post GDS of a 12-bit ADC in Sky130 without involving a proprietary tool. Also needs to come with a writeup of all the steps from beginning to end. (Per comment below by Bora, instead of a 12-bit ADC, whatever is the maximum resolution supported by the repository will be considered sufficient.) The starting point is https://github.com/ucb-art/bag3_sync_sar_adc

Hello, I don't understand how can i save the current into ammeter. How can i save the current? and the second question is, how can i plot Ids(VDD) for vgs_nmos=0.5, 1, 1.5? i tried also dc VDD 0 1.8 0.1 vgs_nmos 0.5 1 1.5, but i am not able to plot the chart ids(vds) for this three vgs voltage

Is there a way for Magic VLSI to become more usable? I read the tutorial, but everything just does not make sense. The layers is completly unusable because you don't know which layers is which, as they are not labeled.

Hi, I'm trying to generate a LEF file from a layout made in cadence using magic, not sure if magic supports that and what are the steps to take. Thanks.

I am trying to run xschem but i am getting missing symbols and this terminal error: daniel-herrera@daniel-herrera-Inspiron-5593:~/Desktop/projects$ xschem Using run time directory XSCHEM_SHAREDIR = /usr/local/share/xschem Sourcing /usr/local/share/xschem/xschemrc init file Sourcing /home/daniel-herrera/Desktop/projects/xschemrc init file Warning: PDK_ROOT env. var. not found or empty, trying to find an open_pdks install open_pdks installation: using /usr/local/share/pdk SKYWATER_MODELS: /usr/local/share/pdk/sky130A/libs.tech/combined SKYWATER_STDCELLS: /usr/local/share/pdk/sky130A/libs.ref/sky130_fd_sc_hd/spice setup_tcp_bespice: success : listening to TCP port: 2022 l_s_d(): Symbol not found: sky130_tests/test_nmos.sym etc etc........ I checked the file path where its looking for the symbols and I am the .sym files are there. Any idea what is going on?