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bias point blowup in pspice 9.1 (demo)

ke0ff
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

  • 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

  • Thanks, that did the trick. FWIW, I'm running WinXP-pro, and there don't seem to be any issues (so far). Cheers.

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