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component property display in schematic editor

apple419

Hi, candece virtuoso users:

   Is there a way to move the component property dispaly locations? For example a nmos transistor, on the scheamtic it shows its instance name, cell name, w, l, multiplier, etc. It looks like those parameter locations are fixed and can not be moved. Sometimes I wish I could move things around to better locations so that make my schematic is easier to read...

   I don't believe Cadence does not allow users do this. I think there must be a way... 

 thanks! 

  • if open the transistor symbol in symbol editor, seems I can move those cdsparam() around to locations I desire. But this basically affects all instances of this transistor. How to adjust on just one isntance not affecting others? another thing, if I set for example w=150u. L=2.5u for a transistor, on the schem it actually shows W=160.00000u and L:2.5u. so why it shows so many 0 on w? Why it does this only on w, not on L? also why on L is use colons (:) not equal (=). I don't like the way it displays things. What controls all these?

  • Use Edit->Select->Filter in the schematic editor and then on the form that appears you can turn on "name" and "label" (and "pin name") for Instance Objects if you want. This then allows  you to select the instance's labels etc and move them (or even delete them).

    As for the formatting. The ":" means that it is showing the default value from the CDF. The precision is probably a function of the CDF callbacks in the PDK - I would guess it's showing the same precision on the edit properties form too? It might be controlled by using:

    aelPushSignifDigits(4) 

    to reduce it, but I suspect this may only have an effect (if at all) when changing the value of the parameter. Most likely it's displaying the label with the  property value as-is.

    Regards,

    Andrew.

  • Hi Andrew,

      I tried what you said and it worked! Now things can be moved around. I feel better now :-)

      I tried setting aelPushSignifDigits(4) in CIW, but it does not appear changing it. May be as you said it is controled by PDK I am using. I will contact our foundry about this.

      Thank you for helping!

    apple419 

     

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