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PSpice RC natural Response help

Discussion in 'General Electronics Discussion' started by JohnEG, Apr 18, 2012.

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  1. JohnEG

    JohnEG

    3
    0
    Feb 17, 2012
    How do i determine the run time and step time in the simulation profile for RC series circuit? I used the RC value but all my traces were not correct. That means i did not see the exponential charging curve of the capacitor. I am trying to plot the graph of the resistor's current and capacitor voltage on the same plot. Instead most traces have a horizontal line or transient spikes.
    I am using time domain transient analysis for the simulation profile. My RC constant is 1 s.
    DC Voltage source 10 V
    Resistor 10kOhm
    Capacitor 100 uF
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    10,821
    2,440
    Nov 17, 2011
    Normally SPICE has usable default settings. Probably something else is wrong. I checked with LTSPICE:
    [​IMG]

    Everything seems fine. You do have that reference to 0 (it's called AGND in LTSPICE, that little triangle to the bottom left)?

    Harald
     

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