hide. A small group of maintainers and the user community contribute to the ngspice project by providing new features, enhancements and bug fixes. Finally, the OP apparently is running gEDA on Linux (look at his screen shots), and generating SPICE netlists with it for ngspice. It could save me a lot of work if the KiCAD->Spice route would work reliably. I've used multisim back when it was called Electronics Workbench. I won’t go into all the ways computing has changed over those five decades, but it’s a tribute to the program’s original authors that it remains a viable piece of software today. Multisim, LTSpice, TINA, pSpice, are but a few of the free programs. 4 … only Pspice as a nonlinear inductor model, Hspice has some unique MOS/BJT models for leading edge geometries, LTSpice is strictly not based on UCB SPICE 3 but the other two are, which both provides advantages and disadvantages in terms of simulation repeatability of models. SPICE Device Models: Principle of Operation of Diodes An answer to some of your questions (sombody else may care for the others). Dave For example, in the circuit below I want to calculate the values of C1b and R2b based on the values of f_p2, f_z2, and R1b. The point with LTspice is that it does not run on Linux and that it is not integrated with KiCAD. It allows Qucs-S to obtain logs from Ngspice. You may apply PSPICE or LTSPICE device model parameters and netlists for simulating discrete circuits. Also, PSpice most demanding for me. Can I simulate in LTSpice and bring the netlist to PCBNew? Figure 16. LTSpice is deliberately insensitive to the file extensions of SPICE model files. I'm using parameter statements to calculate component values in my schematic design. I have never tried this, and I’m not equipped to answer this question well. It also supports serial execution on all common desktop platforms, and small-scale parallel runs on Unix-like systems. Potentiometer Model. LTSPICE *.sub models today are encrypted binary files. It's a 1 minute download and install. LTSPICE OR NGSPICE. You cannot use encrypted models. Circuit Simulator. That way, I can ensure fewer errors in the PCB design. You may apply PSPICE or LTSPICE device model parameters and netlists for simulating discrete circuits. You can try LTSpice out for free. PSIM allows users to run two SPICE engines, the native PSIM SPICE engine which is a NGSPICE/SPICE 3F variant or to run LTSPICE. 11 december 2020 These model files are not usable with other SPICE simulators. Xyce is an open source, SPICE-compatible, high-performance analog circuit simulator, capable of solving extremely large circuit problems by supporting large-scale parallel computing platforms. ngspice handles ibis file as well as mixed mode simulation (Verilog-AMS + Spice) if you install ADMSXml … Custom Ngspice build solves the following issues: Windows GUI of Ngspice is disabled. LTspice wins out (never tried HP) because right click to escape block placing is best. Don't underrate the free feature of LTspice, even if your company pays for PSpice. Can they be deciphered by the simulator (or the plugin)? Wishful thinking but can the LTSpice models also be used on NgSpice? Press J to jump to the feed. By the way, I tried ngspice as well on the same problem with similar results as the KiCAD route. How should encrypted models be used in KiCAD? New comments cannot be posted and votes cannot be cast. I’ve used it to launch LTspice using KiCad. That may explain why he is running ngspice, since it is Linux native. ngspice is the Open Source successor of … Yes. thanks I heard a lot about the Monte Carlo analysis looking into that now. It is recommended to use Linux for NGSPICE. HSPICE twists those knobs, runs a bunch of simulations, and returns the knob-settings that achieved your goal most optimally. How can that be used? I did want to mention, although I’ve never tried myself, I’ve heard from many sources that contacting certain manufacturers directly for unencrypted versions of models can result in them providing them if you sign an NDA. ngspice cannot read them. dchisholm February 17, 2019, 6:54am #5. As the LTSpice “Help” file says. SPICE models that exploit such alterations may, or may not, be compatible with SPICE versions published by other companies. Although, it’s time consuming, you do come out with the added benefit of you understanding the part’s functions more thoroughly than you would have before. SPICE Projects SPICE Simulation projects simulated with all available SPICE platforms. All have shitty UIs - can't get away with that: people able to grok SPICE internals are generally incapable of grokking good UI design, You've omitted some of HSPICE's strongest advantages (assuming it's within budget), Powerful .ALTER mechanism that lets you run theme-and-variations groups of simulations with much greater flexibility than, for example, LTSPICE's ".STEP PARAM", Optimization! Since KiCAD is precompiled on Ubuntu, does adding the ngbehavior=ps flag work if I add it to the .spiceinit/spice.rc file? Even though most of these have been answered above, I’ll take a stab at all of them at once for ease of reference. Yes, if you set the compatibility switch (set ngbehavior=ps) in the newer versions. I never used HSpice. Again in the Generate Netlist window, there is a simulation command. The purpose of the Qucs-S subproject is to use free SPICE circuit simulation. The impedance seen by the current source is equal to Z j =Vo j /Ii j , since the input current is equal to 1 A, the circuit impedance is equal to Vo. INA128.sub contains the spice model file for INA128 (compatible to LTSPICE, PSPICE, ngspice-28). After a little study of the original SPICE syntax, most of the SPICE model files intended for a particular version of SPICE can be converted to other versions. ngspice builds on many operating systems. Sort by. (I believe the first PUBLIC release was in 1972 or '73.) NGSPICE requires you to describe your circuit as a netlist. While it is possible, in principle, to develop generic SPICE or PSpice macromodels, the resultant simulation speed would not be viable. CIRCUIT POT1.CIR Download the SPICE file. NGSPICE is an open source mixed-signal circuit simulator. If you can open a SPICE model file with a standard text editor (such as "Notepad++) then it can probably be used directly, or readily converted, for any SPICE-based simulator. It passes the netlist generated by KiCad and runs it within LTspice, using LTspice’s GUI. level 1. Given those factors, thank you for the reply. I don’t really understand how ngspice’s XSPICE plays into this, so someone please correct me if I’m wrong. Linear Technology, for example, publishes encrypted models for simulating their switching regulators with LTSpice. Numerous commercial versions of SPICE have been developed and released (and, in some cases, abandoned) over that time span. save. Also consider SPICE 2g6 and SPICE 3 from UCB - both are OSS and both are Berkeley licensed. Spice simulation as an area seems too fragmented between several simulators each with its own limitations and several of them being limited to Windows unfortunately. Experienced SPICE designers have likely encountered the frustration of SPICE model syntax compatibility. PSpice vs LTspice vs HSpice. 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