01-13-2014 02:26 AM
howdy,
My work with mulitism focuses on the analysis of equivalent circuits. I approach this through a transient analysis over a custom voltage input which I run through the PWL and export the data through excel for analysis, matching up the time of the transient analysis with the voltage through the circuit. Allowing me to observe the I-V performance.
The problem is the the exported data is usually an array of hundred of entries. That may or may not align with the discrete values of my custom voltage input and allow for direct analysis between real world data.
Is there a way to lock the time step (significantly reduce the number of interations) over the transient analysis to allow me to always export the same voltages. I.e only the voltages specified in my custom piecewise power source.
The reason I am interested in doing this is to generate data which directly matches up with the specified custom voltage input and that matches up with my real world experimental data and would not require me to pick through hundreds of iterations at varied voltages and cherry pick the points that compare to my real life measurements for analysis.
many thanks.
01-14-2014 02:08 PM
SPICE simulations doesn't have a fixed delta time, if the signal is changing rapidly the SPICE engine will slow down and take more samples and if the signal is constant it will automatically speed and take fewer samples. You cannot control the SPICE simulation sampling. One suggestion is to export an .lvm file instead of an Excel file because Multisim will convert the data to have a constant delta t which may be better for you. You can open the .lvm file with Notepad to view the format.