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Use the educational examples, oscillators, Colpits and remove the resonating inductor leaving the active device and passive feedback elements in place. Do a scattering parameter operation and note the

LTSpice generates .raw output files, noramlly. I am using PyLTSpice tp prepeare netlist before simulation. I am manually writing the netlist. After simulation, I am gathering .raw files and reading

So -- what files does PyLTspice need to write and read? I still think (from your description) that this is the bottleneck. Andy

No, I am not using .MEAS commands. I tried using some mechanisms that reduced filesize for .raw files, but results remained the same.

As far as I know, file reading and writing are part of the reported simulation time. You might affect that by controlling where it accesses those files, and how big they can be. Andy

Wait - are you using .measure commands?? Is that where you see things slowing down? .MEAS commands are indeed processed after the simulation is over. Andy

Unfortunately, I can not use .STEP command. My main problem is finding multi-port s-parameters of a given circuit. LTSpice only supports 2-port s-parameters. To measure 4-port s-parameters I need to

Can you re-do your sims using .STEP ?? Thus avoiding PyLTspice? Andy

I made the schematic in LTspice and it runs very fast. The netlist is: * C:\Program Files\ADI\LTspice\Draft1.asc V1 N001 0 AC 1 0 L1 N002 N001 10? C1 N002 0 1p R1 N002 0 50k .ac dec 150 10meg 100G

I have no familiarity with PyLTspice.? But you say most of the time is spent doing something other than the LTspice simulation itself.? Which means the cause is something other than LTspice. Maybe

eetch00, I obtained this from viewing LTSpice netlist. Nevertheless, I tried changing it after your comment and results remained the same

You can confirm the netlist format by simulating it directly in LTspice without using python. It won't run correctly formatted the way you've shown. See my previous post.

try the developer.? GitHub - nunobrum/PyLTSpice: Set of tools to interact with LTSpice. See README file for more information. | | | | | | | | | | | GitHub - nunobrum/PyLTSpice: Set of tools to

The circuit may have some unreasonable problems, however, I am not plotting anything, nor am I trying to obtain any meaningful data from this circuit. This is a dummy circuit that represents the

I see. but there are problems with this simple circuit. Using a linear sweep with such a wide range doesn't result in a useful frequency response plot. A decade sweep is much better. Also, the 50 ohm

On Sat, Mar 29, 2025 at 12:01 PM, <davitkharshiladze26@...> wrote: > > Hello Everyone, > > I am trying to simulate very simple circuit using PyLTSpice. However, > simulation takes too much time.

I am trying to automate circuit simulation process. This is a simple representation of my large problem.

I don't know anything about PyLTspice, but why don't you use LTspice directly? Are you using an OS other than Windows, MAC or Linux?

Hello Everyone, I am trying to simulate very simple circuit using PyLTSpice. However, simulation takes too much time. It takes 1 second for the simulation to complete. Even when I increased the

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