Stats

  • Replies 1
  • Subscribers 129
  • Views 131
  • Members are here 0

How to run transient Analyis First and then STB analysis?

SP202510274257

I was using running multiple analysis for a circuit and for different corners. Analysis includes ac, dc, STB, noise and transient. My simulation result for Loop gain, which was negative, it supposed to be positive, I ran that particular point using debug environment at that time I got the correct result. So, I found out that I was getting incorrect result due to the fact STB analysis was running first and then transient was running. So, i need to run Transient and then STB. how can I do that?
Thank you

Parents
  • Andrew Beckett

    You can change the order of the analyses by dragging the order around in the ADE window. However, I wouldn't expect this to make a difference because the stb analysis should use the operating point for the DC point, not wherever the transient ended up at. Similarly I'd expect the debug environment to run with the same analysis order as individual simulations.

    I wonder whether your circuit has multiple stable operating points; if so, then that can lead to arriving at one of the multiple operating points differently depending on the starting point. In this case, they are both correct. You should take care to understand if there are multiple operating points and adjust the circuit to eliminate them if this is undesirable behaviour.

    Andrew

Reply
  • Andrew Beckett

    You can change the order of the analyses by dragging the order around in the ADE window. However, I wouldn't expect this to make a difference because the stb analysis should use the operating point for the DC point, not wherever the transient ended up at. Similarly I'd expect the debug environment to run with the same analysis order as individual simulations.

    I wonder whether your circuit has multiple stable operating points; if so, then that can lead to arriving at one of the multiple operating points differently depending on the starting point. In this case, they are both correct. You should take care to understand if there are multiple operating points and adjust the circuit to eliminate them if this is undesirable behaviour.

    Andrew

Children
No Data

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.