LTSPICE: equally spaced timesteps

I cannot find the similar spice directive like ".option interp"(in HSPICE) or "strobeperiod"(in Spectre) in LTSPICE.
In LTPISCE, I do the FFT twice, but lose accuracy during the transient edge.

Is there anyway to set equal timestep in transient simulation?

Thanks

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  • +1
    •  Analog Employees 
    •  Super User 
    on Apr 13, 2021 5:59 AM

    Hi you can set the maximum timestep iin the simulation command setup window. This ensures that there are everywhere sufficient points. 

    the other thing is to simulate for long enough time and select a fitting number of points for the simulated time. Switch of the Smoothing and select a proper Windowing.

    use the altermnate solver.

    Disable compression (as a directive in the circuit place a spice command 

    .options plotwinsize=0)

     

    This are the things which come to my mind on the first view.

Reply
  • +1
    •  Analog Employees 
    •  Super User 
    on Apr 13, 2021 5:59 AM

    Hi you can set the maximum timestep iin the simulation command setup window. This ensures that there are everywhere sufficient points. 

    the other thing is to simulate for long enough time and select a fitting number of points for the simulated time. Switch of the Smoothing and select a proper Windowing.

    use the altermnate solver.

    Disable compression (as a directive in the circuit place a spice command 

    .options plotwinsize=0)

     

    This are the things which come to my mind on the first view.

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