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Question on LTspice noise simulation set up

Thread Summary

The user encountered an error in LTspice noise simulation when setting 'Input' to V(Vout). The solution involves ensuring Vout is a valid node by naming it correctly and attaching it to a wire, and checking for an extra closed parenthesis in the .noise directive.
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Category: Software
Product Number: LTspice
Software Version: LTspice

On the LTspice noise simulation set up table, I inputted the "Input" = V(Vout). It gave me error message (^^^^^^^). How do I fix it? See the screenshot below. Thanks.

     

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  • Hi  ,

    You have not uploaded your files, so I just have to guess.

    From the errors, it appears Vout node is not a node, but just a floating illegal directive. With your schematic open, press "N", type "Vout" for the net name, click OK and attach the node of the net name to a wire. You may want to do the same for Vin.

    I don't see a .noise directive, but from the error, it looks like you have an extra closed parenthesis symbol. V(Vout)). This may be a result of the above problem.

    mike

Reply
  • Hi  ,

    You have not uploaded your files, so I just have to guess.

    From the errors, it appears Vout node is not a node, but just a floating illegal directive. With your schematic open, press "N", type "Vout" for the net name, click OK and attach the node of the net name to a wire. You may want to do the same for Vin.

    I don't see a .noise directive, but from the error, it looks like you have an extra closed parenthesis symbol. V(Vout)). This may be a result of the above problem.

    mike

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