LTSpice simple simulation

Discussion in 'The Projects Forum' started by j4e8a16n, Mar 23, 2014.

  1. j4e8a16n

    Thread Starter Member

    May 1, 2013
    33
    0
    Hi,

    I am trying to get that circuit to work but LTSpice takes a lot of time to do nothing.
     
  2. ifixit

    Distinguished Member

    Nov 20, 2008
    638
    108
    Put a ground (0V) reference in somewhere.
     
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  3. j4e8a16n

    Thread Starter Member

    May 1, 2013
    33
    0
    Ah! Shhhhh------tttttt.

    :eek:)
     
  4. j4e8a16n

    Thread Starter Member

    May 1, 2013
    33
    0
    Hi ,

    How do I get my OP point working?

    See ASC file OP.

    ---------

    PS: How do I get advise when there is replies to my posts?
     
  5. ericgibbs

    Senior Member

    Jan 29, 2010
    2,499
    380
    hi j4,
    Which parameter/s on that circuit are you interested in plotting.?
    E
     
    Last edited: Mar 24, 2014
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  6. j4e8a16n

    Thread Starter Member

    May 1, 2013
    33
    0
    DC op wich gives a text box of the various voltages and currents.

    Here is the last shema I did.
     
  7. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,762
    1,099
    Go to Simulate/Edit Sim Cmd, then select DC Op pnt, then drop the resulting .op onto the schematic.
     
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  8. j4e8a16n

    Thread Starter Member

    May 1, 2013
    33
    0
    I did that but the text window does not open.
     
  9. ericgibbs

    Senior Member

    Jan 29, 2010
    2,499
    380
    Normally you use the .op command for fixed DC analysis only, after running the Sim, move the cursor over the circuit Nodes and read the values on the lower Status bar..

    You are stepping your params so there will be no steady state values.
     
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  10. j4e8a16n

    Thread Starter Member

    May 1, 2013
    33
    0
    Ok. That's it.
     
  11. ericgibbs

    Senior Member

    Jan 29, 2010
    2,499
    380
    If you ever want to view the data, Right click on the PLOT window and from the drop down menu , select View/ Spice Error log..

    This Spice Log does a number of jobs.
     
    Last edited: Mar 24, 2014
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