Ngspice raw file output question: Hi all, I'm trying to use the -r flag in ngspice batch mode to specify a raw file to output the simulation results to. The thing is that although ngspice clearly acknowledges the path and file name I specify on the command line because it prints a message to the console detailing it as the binary raw file to output to it doesn't ever actually write a file. Can anyone help? Thanks

hello! i'm trying to install OpenROAD using OpenROAD-flow-scripts but there is an error

-- GPU is not enabled
CMake Error at src/mpl2/CMakeLists.txt:42 (find_package):
  By not providing "Findortools.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "ortools", but
  CMake did not find one.
By not providing "Findortools.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "ortools", but
  CMake did not find one.

  Could not find a package configuration file provided by "ortools" with any
  of the following names:

    ortoolsConfig.cmake
    ortools-config.cmake

  Add the installation prefix of "ortools" to CMAKE_PREFIX_PATH or set
  "ortools_DIR" to a directory containing one of the above files.  If
  "ortools" provides a separate development package or SDK, be sure it has
  been installed.

i can not find such package "ortools-config.cmake" to install. i would appreciate it if anyone could help

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.

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

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

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

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!!

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.

is there any tutorial on how to connect ngspice to sky130 ?

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.