pspice transistor ignored ?

Discussion in 'Programmer's Corner' started by amitai, Sep 29, 2014.

  1. amitai

    Thread Starter New Member

    Sep 29, 2014
    5
    0
    Hi all,
    I'm trying to simulate a circuit which consists a transistor.
    After running the simulation I see that the the transistor doesn't exist
    in the netlist and therefor I get the error of:
    " Node N16280 is floating"
    I tried adding various 10meg resistor's which didn't change anything.
    I tried using other versions of the transistor with no success.
    Other simulations I tried work fine. I can't manage to upload the files of the project so
    I'm attaching the *.out file and a capture of the circuit.

    What can the problem be?
    Thanks,
    Amitai




    Code (Text):
    1.  
    2. **** 09/29/14 13:16:23 ****** PSpice Lite (October 2012) ****** ID# 10813 ****
    3.  
    4. ** Profile: "SCHEMATIC1-sim_LC1"  [ C:\Users\amitaiw\Dropbox\work\schematics and simulations\SPICE\other LC circuits\lc1-pspicefiles
    5.  
    6.  
    7. ****     CIRCUIT DESCRIPTION
    8.  
    9.  
    10. ******************************************************************************
    11.  
    12.  
    13.  
    14.  
    15. ** Creating circuit file "sim_LC1.cir"
    16. ** WARNING: THIS AUTOMATICALLY GENERATED FILE MAY BE OVERWRITTEN BY SUBSEQUENT SIMULATIONS
    17.  
    18. *Libraries:
    19. * Profile Libraries :
    20. * Local Libraries :
    21. * From [PSPICE NETLIST] section of C:\Users\amitaiw\AppData\Roaming\SPB_16.6\cdssetup\OrCAD_PSpice/16.6.0/PSpice.ini file:
    22. .lib "nomd.lib"
    23.  
    24. *Analysis directives:
    25. .TRAN  0 0.2 0
    26. .OPTIONS ADVCONV
    27. .PROBE64 V(alias(*)) I(alias(*)) W(alias(*)) D(alias(*)) NOISE(alias(*))
    28. .INC "..\SCHEMATIC1.net"
    29.  
    30.  
    31.  
    32. **** INCLUDING SCHEMATIC1.net ****
    33. * source LC1
    34. R_R1         N14411 VCC  15k TC=0,0
    35. R_R3         0 N14411  5k TC=0,0
    36. R_R4         0 N16286  68 TC=0,0
    37. L_L1         N16165 VCC  3.3u
    38. V_V1         VCC 0 9Vdc
    39. C_C3         0 N14411  1uF  TC=0,0
    40. C_C4         N16280 VCC  33n  TC=0,0
    41. C_C5         N16165 N16280  10n  TC=0,0
    42. C_C6         N16286 N16280  47n  TC=0,0
    43.  
    44. **** RESUMING sim_LC1.cir ****
    45. .END
    46.  
    47. ERROR(ORPSIM-15142): Node N16280 is floating
    48.  
     
  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    Are you sure the transistor model is in an included model file? Is the '/TO' part of the transistor name essential?
     
  3. amitai

    Thread Starter New Member

    Sep 29, 2014
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    This is one of the versions of the transistor which I tried. I started with the first option of the 2n3904 and then tried the "to" extention.
    With this circuit I get the same error:
    Capture.PNG
     
  4. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    The only model library file referenced is "nomd.lib". Are you sure that contains the transistor models you need?
     
  5. amitai

    Thread Starter New Member

    Sep 29, 2014
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    How can I verify that?
    I choose the components by typing there name in the place part section.
    I have added all the libraries which I could.
     
  6. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    I'm not familiar with Pspice, but in LTspice the models are in plain ASCII text files, so it's easy to use Notepad or similar to check file contents.
     
  7. amitai

    Thread Starter New Member

    Sep 29, 2014
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    It seems that the problem isn't connected to the libraries issue.
    Trying to simulate a simple circuit which doesn't include active components also results in an error:
    Capture.PNG
    When I'm shorting the C5 cap the simulation works fine. but when it excites and is connected (I have tried several times
    to be sure that it's wired) there is an error. All the cap's are the same type in the circuit.
    I tried also reinstalling the software. any suggestions?
     
  8. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    Is node 15158 the midpoint of the two caps? You need to add a resistor across one of them, say 1e9.
     
  9. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    That's weird.
    Can you give either C4 or C5 (or both) an Equivalent Series Resistance value to see if that fixes it?
     
  10. amitai

    Thread Starter New Member

    Sep 29, 2014
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    0
    Hi,
    I reinstalled the software and that seems to solve the problem...
    Thanks alec for the help
     
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