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spectre mtline connection problem

jyang

When using mtline model in cadence spectre schematic simulation, why I can not connect output of one mtline to output of another mtline? (warnings show there will be short circuit and floating nodes)

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  • It's because the symbol has the pins on the left as being input pins, and those on the right as being output pins.

    It won't affect the simulation - it's just a spurious check because the pin directions are set on mtline. It would be better if mtline had inputOutput pins as each pin - then the problem wouldn't occur. So I'd suggest raising this with customer support.

    You can go to Check->Rules and set "Shorted Output Pins" to "ignored" and then the warnings will go away.

    Regards,

    Andrew.

     

Reply

  • It's because the symbol has the pins on the left as being input pins, and those on the right as being output pins.

    It won't affect the simulation - it's just a spurious check because the pin directions are set on mtline. It would be better if mtline had inputOutput pins as each pin - then the problem wouldn't occur. So I'd suggest raising this with customer support.

    You can go to Check->Rules and set "Shorted Output Pins" to "ignored" and then the warnings will go away.

    Regards,

    Andrew.

     

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