I still prefer NGSpice. Compared to LTSpice its main drawbacks are (i) some useful simple functions implementations (step param and param type measurement, for instance); (ii) data visualization; (iii) and the lack of a really usable GUI (there are a few, but I dislike them). LTSpice data visualization is also a problem with several bugs unsolved since it was still registered under Linear Technology. The lack of GUI would help at least for code debugging, but you can get used to working without it. LTSpice convergence is still superior, though. And the results of LTSpice are different from NGSpice for the same simulation, due to its internal solver.
NGSpice also lets you control the flux of the simulation with the use of well-known programming structures (if-else, while, dowhile, foreach). For simple simulations, you can also run it in batch mode and export the results to .raw file that can be opened inside LTSpice. But only if they are voltages and currents. You couldn't plot the resistance variation of an NTC, for instance. But the main reason for NGSpice is to have access to transistor internal parameters. LTSpice doesn't let you use them in your calculations. LTSpice only shows you the small-signal parameters if you use .op and .ac together, and the parameters shown are only for seeing and based in the initial solution of the circuit. If you want to investigate the evolution of a MOSFET transconductance with a biasing voltage, for instance, you can't do it with LTSpice. Moreover, if your transconductance investigation has to be carried out with transient analyses, forget it. Lastly, NGSpice it's not only Spice ( http://ngspice.sourceforge.net/presentation.html). It supports another type of simulations together with the traditional spice ones, increasing the number of design types you can do with it. And, there are alternatives (that I didn't try yet) like PySpice, using NGSpice with Python and probably providing easier to use plotting tools for NGSpice simulations. I'm still getting used to the whole set of commands, instructions, and the need for specific coding for simple tasks of NGSpice but the more I use the more I see it's better for my purposes. Kind regards, Patrick. On Tue, Sep 15, 2020 at 1:56 AM Joselito Morallo <[email protected]> wrote: > Hi RK! > > I got this link with your information about LTSPICE someone also could > look possibility for analog IC Design Simulation > https://www.analog.com/en/design-center/design-tools-and-calculators/ltspice-simulator.html > > Best Regards, > > Joselito Isaac P. Morallo > Open Source HW/SW Advocate > Republic of the Philippines > > On Tue, Sep 15, 2020 at 12:33 PM R K Tiwary < > [email protected]> wrote: > >> one can install LTSPICE for verifying the circuit developed in Electric. >> Regards >> >> On Mon, Sep 14, 2020 at 6:46 PM Joselito Morallo <[email protected]> >> wrote: >> >>> [image: Boxbe] <https://www.boxbe.com/overview> >>> [email protected] is not on your Guest List >>> <https://www.boxbe.com/approved-list?tc_serial=53364367832&tc_rand=1920613110&utm_source=stf&utm_medium=email&utm_campaign=ANNO_MWTP&utm_content=001&&key=YhD9XCP4NSWvXC%2BTkv%2Bcu%2BwzE6syuI3%2FKMacs5HHMb4%3D&token=q5WSgploRic47o6lweQZtrCwEfUJlvK3RQ6ZqNgbg16qsdU1%2BwdVRvFiLtQ2yzZt> >>> | Approve sender >>> <https://www.boxbe.com/anno?tc_serial=53364367832&tc_rand=1920613110&utm_source=stf&utm_medium=email&utm_campaign=ANNO_MWTP&utm_content=001&&key=YhD9XCP4NSWvXC%2BTkv%2Bcu%2BwzE6syuI3%2FKMacs5HHMb4%3D&token=q5WSgploRic47o6lweQZtrCwEfUJlvK3RQ6ZqNgbg16qsdU1%2BwdVRvFiLtQ2yzZt> >>> | Approve domain >>> <https://www.boxbe.com/anno?tc_serial=53364367832&tc_rand=1920613110&utm_source=stf&utm_medium=email&utm_campaign=ANNO_MWTP&utm_content=001&&dom&key=YhD9XCP4NSWvXC%2BTkv%2Bcu%2BwzE6syuI3%2FKMacs5HHMb4%3D&token=q5WSgploRic47o6lweQZtrCwEfUJlvK3RQ6ZqNgbg16qsdU1%2BwdVRvFiLtQ2yzZt> >>> Dear ElectricVLSI Group: >>> >>> This is also a follow up in support to Sir Estevao Teixeira, >>> Does anyone here can help provide the HSPICE Simulation Tool? >>> >>> Schematic drawing can be done using ElectricVLSI and check compatibility >>> else, we need open source community to help enable it in ElectricVLSI to do >>> Analog design - - >this will be another proposal. >>> >>> Best Regards, >>> >>> Joselito >>> >>> >>> On Mon, Sep 14, 2020, 7:09 PM Estevao Teixeira < >>> [email protected]> wrote: >>> >>>> I have interest on development of an analog/mixed-mode design using >>>> 180nm SkyWater on Electric. Do you know how can we get SPICE models for >>>> this process? >>>> >>>> Regards, >>>> >>>> Estevao >>>> >>>> Em segunda-feira, 14 de setembro de 2020 às 02:50:45 UTC-3, >>>> [email protected] escreveu: >>>> >>>>> Dear Electric Group: >>>>> >>>>> We can propose to electric users to work together and collaborate to >>>>> create a SoC for the 180 nm. >>>>> >>>>> Google plans s free shuttle tape put for interested chip makers to use >>>>> the process for both analog and digital design, what is good from this >>>>> process is they have already thr digital logic cells. >>>>> >>>>> A collaboration for analog design engineers to use electric to make >>>>> the analog cells with one goal. >>>>> >>>>> Both 32/64 bit Core can be used as efabless Tim Edwards mention in >>>>> some workshop. >>>>> >>>>> I can both participate in doing analog design and layout. >>>>> >>>>> Best Regards, >>>>> >>>>> Joselito >>>>> >>>>> On Mon, Sep 14, 2020, 11:07 AM Abel Joseph John <[email protected]> >>>>> wrote: >>>>> >>>>>> >>>>>> Will Electric add support for the to be released SkyWater PDK? >>>>>> >>>>>> -- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "Electric VLSI Editor" group. >>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>> send an email to [email protected]. >>>>>> To view this discussion on the web visit >>>>>> https://groups.google.com/d/msgid/electricvlsi/8d6feba0-e425-47ff-a0b9-4acf8ab0a3b1n%40googlegroups.com >>>>>> <https://groups.google.com/d/msgid/electricvlsi/8d6feba0-e425-47ff-a0b9-4acf8ab0a3b1n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>> . >>>>>> >>>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Electric VLSI Editor" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/electricvlsi/23204cdc-4723-473f-b1b4-f29c28a01378n%40googlegroups.com >>>> <https://groups.google.com/d/msgid/electricvlsi/23204cdc-4723-473f-b1b4-f29c28a01378n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Electric VLSI Editor" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/electricvlsi/CALy8%2BG6pZ80Xmeb4zr6wZ%2BDpukLxws5dU8Z7DUsb-FDr7fZcrQ%40mail.gmail.com >>> <https://groups.google.com/d/msgid/electricvlsi/CALy8%2BG6pZ80Xmeb4zr6wZ%2BDpukLxws5dU8Z7DUsb-FDr7fZcrQ%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >>> >> >> >> -- >> R.K.Tiwary >> Asst. Professor(off Campus), EEE >> BITS , Pilani >> Tower-B, H2-502 >> Classic Residency >> Rajnagar Extn. >> Ghaziabad 201003 >> mob-9871482697 >> resd-0120-2986502 >> [email protected] >> >> [image: Inline image] >> >> *Birla Institute of Technology & Science, *Pilani >> Pilani Campus Vidya Vihar, Pilani - 333031, Rajasthan, India >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Electric VLSI Editor" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/electricvlsi/CABe4omd6AVaJ_Bbm41Fczh2%2BYCe-vcXq-b0o9HB%2BNOXtSYzc-g%40mail.gmail.com >> <https://groups.google.com/d/msgid/electricvlsi/CABe4omd6AVaJ_Bbm41Fczh2%2BYCe-vcXq-b0o9HB%2BNOXtSYzc-g%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > You received this message because you are subscribed to the Google Groups > "Electric VLSI Editor" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/electricvlsi/CALy8%2BG5bebc1vi%2BkEZB3PZsux_QcQCZ%3DPaJyeBZ7qRgoPDAY4A%40mail.gmail.com > <https://groups.google.com/d/msgid/electricvlsi/CALy8%2BG5bebc1vi%2BkEZB3PZsux_QcQCZ%3DPaJyeBZ7qRgoPDAY4A%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- Patrick Mendes dos Santos, Professor, M.Sc. Departamento de Engenharia Elétrica / Electrical Engineering Department Federal Center of Technological Education of Minas Gerais (CEFET-MG). Campus II, Av. Amazonas, 7675, Nova Gameleira. CEP: 30510-000. Belo Horizonte, Minas Gerais. Brazil. Phone: +55 31 3319 6834. e-mail: [email protected] Website: http://www.eng-eletrica.bh.cefetmg.br/ <http://www.engenhariaeletrica.cefetmg.br> -- You received this message because you are subscribed to the Google Groups "Electric VLSI Editor" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/electricvlsi/CACog4cGGsjN41tO1%2BZGONzJuyn8%3Dhrf70Lh6AjVZosjJZpdE3g%40mail.gmail.com.
