Stats

Locked Locked
Replies 3
Subscribers 125
Views 1932
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

NO DC solution found(No convergence) when use ADEXL,but use ADEL is right.

I simulate a buf with multiple feedback loops. When I use ADEXL simulate corners, many corner displays sim errors. The output log displays NO DC solution found(No convergence). But I use ADEL to simulate the same corner, the result is successful.May I ask how to solve this problem?

Parents

Andrew Beckett over 2 years ago

There must be a difference, because ultimately Spectre runs on a netlist. I'd start by comparing the netlists to determine what is different.

Andrew
Cancel
Vote Up 0 Vote Down

Cancel
SpiceHusky over 2 years ago in reply to Andrew Beckett

I checked and found that the two netlists are the same.
Cancel
Vote Up 0 Vote Down

Cancel

Reply

SpiceHusky over 2 years ago in reply to Andrew Beckett

I checked and found that the two netlists are the same.
Cancel
Vote Up 0 Vote Down

Cancel

Children

Andrew Beckett over 2 years ago in reply to SpiceHusky

OK, the next thing to check was whether they were simulated with the same options. Check the command-line at the top of the spectre log file - was one run with APS and one without, for example?

There must be a difference in either the netlist or the command-line arguments to the simulator - otherwise the simulator is seeing the same thing. There have been very rare cases where there is some random initialisation problem, but that's extremely unlikely.

If you can't find a difference, please contact customer support.

Andrew
Cancel
Vote Up 0 Vote Down

Cancel

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.