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On Sat, Mar 29, 2025 at 3:01 PM, davitkharshiladze26 via groups.io

<davitkharshiladze26@...> wrote:

Hello Everyone,

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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 complexity of the circuit, time taken for simulation still stays approximately the same. I increased-decreased number of freuqncy points in my ac analysis, this had little to no effect on simulation runtime.

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I feel like most of the simulation time is spent reading-writing files. Does anybody has any suggestions that can be beneficial to speeding up the process?

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Currently, I am using LTSpice simulator, as seen on the third line.

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import time

from PyLTSpice import SimRunner

from spicelib.simulators.ltspice_simulator import LTspice

# Create the netlist file (simple_lc.cir)

netlist_content = """* Simple LC Resonant Circuit

V1 N001 0 AC 1

L1 N001 N002 10uH

C1 N002 0 1pF

R1 N002 0 50

.ac lin 1500 40Meg 60g

.save V(N002)

.end

"""

# Save netlist

netlist_filename = "simple_lc.cir"

with open(netlist_filename, "w") as f:

? ? f.write(netlist_content)

LTC = SimRunner(output_folder='/temp', simulator=LTspice) # init simulation runner

for i in range(1,10): # iterate ove reverything

? ? ? ? t1 = time.time()

? ? ? ? LTC.run(netlist=netlist_filename)

? ? ? ? LTC.wait_completion()

? ? ? ? print(f"{t1 - time.time()} - Simrun")