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 bias point blowup in pspice 9.1 (demo) 

Last post Fri, Feb 6 2009 7:27 AM by ke0ff. 2 replies.
Started by ke0ff 05 Feb 2009 11:36 AM. Topic has 2 replies and 1922 views
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  • Thu, Feb 5 2009 11:36 AM

    • ke0ff
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    • Joined on Thu, Feb 5 2009
    • Austin, US
    • Posts 2
    • Points 25
    bias point blowup in pspice 9.1 (demo) Reply
    I have a relatively simple biquad filter I am trying to simulate using uA741s. The bias points for all of the nodes are at 738E6 V. For the life of me, I can't seem to find the source of these ridiculous voltages. Any help is greatly appreciated. TNX
    • Post Points: 20
  • Fri, Feb 6 2009 1:56 AM

    • oldmouldy
    • Top 10 Contributor
    • Joined on Tue, Jul 15 2008
    • Woking, Surrey
    • Posts 1,454
    • Points 24,710
    Re: bias point blowup in pspice 9.1 (demo) Reply

    I suspect that your citcuit lacks a "0" symbol, in the "Source" library for that release, place a Ground, add the source.olb if absent, pick "0", and wire this in as your zero reference.

    Checking for this has impoved over the releases. I also doubt that you are running this product on a supported OS since 95 / 98 / NT4 only were supported for 9.1

    • Post Points: 20
  • Fri, Feb 6 2009 7:27 AM

    • ke0ff
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    • Joined on Thu, Feb 5 2009
    • Austin, US
    • Posts 2
    • Points 25
    Re: bias point blowup in pspice 9.1 (demo) Reply
    Thanks, that did the trick. FWIW, I'm running WinXP-pro, and there don't seem to be any issues (so far). Cheers.
    • Post Points: 5
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Started by ke0ff at 05 Feb 2009 11:36 AM. Topic has 2 replies.