Stats

  • Locked Locked
  • Replies 2
  • Subscribers 125
  • Views 5512
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

XNOR Gate Operation Issue in Cadence

Maria98

Hi 

I wanted to XNOR the data stream with its one-bit delayed stream. But not getting the correct values at some highlighted intervals. Any idea what could be the mistake? The delay block setting is of 1ns with a 50 ohm characteristic impedance.

thanks

  • You didn't mention which library this xnor comes from (it looks like xnor_gate from ahdlLib though). If it's that view, the problem is almost certainly that you've set the threshold for the input (vtrans) to a ridiculously small value - it should be more like 0.5V whereas you've set it to be some minuscule fraction of a variable per (presumably a period in time).Your tdel is probably a bit short too, but I think it's the vtrans that is the issue. Set it to 0.5 and see what happens.

    Andrew

  • in reply to Andrew Beckett

    Dear Andrew

    XNOR gate is from ahdlLib. It solved setting Vtrans properly. Thanks for the correction.  

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.