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Hello. I'm using docker and wanna to run xschem with gf180mcu. I set environmental variables but, when I run xschem there is a message that Unable to open file: ,,,,,, how can I solve it? and I ignored that message and simulate gf180mucC's nfet but it didn't work.

Hello. I'm trying to start a simple simulation of mosfet in GF180mcuC. I'm following the tutorial video based on sky130 () This is the schematic I draw, but I think that the mosfet model is missing. I cannot match the process of sky130 with Gf180mcuC. How can I add mosfet model for my simulation? Thanks :) first picture : my drawing second picture : youtube tutorial picture third picture : the result of simulation

** addition I included a model command as below picture. but there was an error.

Hi <!channel> , i am new in this space. May i get steps to install all required open source softwares for the design. Please guide me to first install all necessary tolls. Thanks @Boris Murmann

Any documents or video explaining the steps would be great help

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hi. How can I measure transconductance(gm) of mosfet? I coded like below. but it was only ZERO.

Hello. I'm using xschem and ngspice with gf180MCU. I found that there are some digital libraries provided. but I can't find it and use it in xschem. What is wrong with my program? there is no folder about xschem symbols.

Hello everyone! I'm trying to design a differential amplifier with current mirror biasing using the the gm/Id methodology. Hand calculations and the simulation results are not in agreement. (I've attached the relevant screenshots). I'm new to the method and I'm trying to learn by designing an actual circuit. I think one of the problems I'm having is with the calculated width W (from the gm/Id and Id/W relationship). The calculated W is 3.142e-5m and maximum W I've seen so far in the sm141064.ngspice file is 0.5um(I'm using the GF180mcu ngspice models). Please I don't mind having a call for a tutorial on this design methodology. I'm an undergraduate I really need to learn these things. Thank you.

Hello. I'm using xschem & ngspice as the below picture. I want to look at parameters and characteristics of mosfet. but "display all" command doesn't show my mosfet. @Akira Tsuchiya mentioned about this problem but is there any solution? picture #2 is the screenshot of youtube tutorial of SKY130(). He commanded "display all" and it showed the mosfet. I think there is a difference between gf180mcu and sky130

Hi Junbeom, I have the same problem. I could not observe the mosfet parameters Vth, Gm, etc. In sky130 it is ok if you type @m.x1.m0[id] to observe the plot of the id current for the mosfet. However in gf180 i tried this command but i could not get the current. Thus, I worked with the ammeter element. Follows the Id vs Vgs and Id vs Vds plots. Hope it could help you.

<!here> Important Notice: Deadline for submissions has been extended by a week: https://github.com/sscs-ose/sscs-ose-chipathon.github.io/pull/9

Hi everyone, I am running the tool installation script from the notebook template and I have the following error. Do you how to solve it? I also run the script "!ngspice -b netlist.spice" and I have the following error. Kind regards,

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Hi everyone, can someone provide the link of GF180 PDK. I need to install it.

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<!here> Dear All - The selected projects for the 2023 Chipathon are out! Looking forward our weekly meetings and seeing your progress. Thanks all for participating! Please take a look: https://github.com/sscs-ose/sscs-ose-chipathon.github.io/blob/main/initial_notebooks_2023/accepted_notebooks/README.md

<!here> To all selected teams & volunteers: Please indicate your availability for our weekly Zoom meetups: https://www.when2meet.com/?20260026-9P8bp. We are looking for a one-hour slot between 7-9am Pacific time, which lets us cover all time zones reasonably well. The goal is to start with a kickoff & planning meeting in the week of June 19 and then continue weekly with the same time slot until tape-out. I look forward to working with everyone!

Hi everyone ! congratulation to all selected teams. Does any team have a vacancy ? If yes I’m interested in joining.