Problem with 2N3904 BJT model

Home › Forums › Bug Reports › Problem with 2N3904 BJT model

  • This topic has 1 reply, 2 voices, and was last updated 5 years ago by zhu.
Viewing 2 posts - 1 through 2 (of 2 total)
  • Author
    Posts
  • 19. November 2020 at 18:35 #658
    Jess_Stuart
    Participant

      I’m having an issue with the built-in 2N3904 BJT model.  Calculate DC bias gives “nanV” for each node, and there are warnings when I try to do a DC simulation about floating nets.  I can replace the 2N3904 transistor with another transistor 2N2222 for example, and the DC bias-point calculation works fine.  I think there may be an issue with the 2N3904 transistor model.  I verified this issue on a clean install.

      Attached is a test schematic.

       

      Attachments:
      1. 2N3904_DC_bias_not_working.zip
      20. November 2020 at 9:16 #660
      zhu
      Participant

        Right click on the transistor, Edit Properties, roll down to the parameter IRb=50.3624 and set it to IRb=0. This parameter has been re-installed in v3.3.2 and this device must have been skipped.

      • Author
        Posts
      Viewing 2 posts - 1 through 2 (of 2 total)
      • You must be logged in to reply to this topic.