Stats

  • Locked Locked
  • Replies 8
  • Subscribers 125
  • Views 19174
  • 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

Initial Condition for Inductor

tester

Dear All,

I am using  Cadence IC5141 and running a simulation which requires the ".IC" setup for inductors. I tried to put some value under the "initial condition" field of the inductor, but the value is going when I doubly confirmed it with the transient analysis. Are there anything that I may miss or the initial condition of the inductor does not work at all? By the way, are there any alternative way to figure this out? Thanks a lot in advance.

 

 

 

Parents

  • Dear Andrew,

    Thank you very much for your try. With the same exact input.scs (unless you have changed the some of the analysis parameter, which I would love to know and give a try myself), the current starts off at 30.4mA. I do not know how to paste the simulation output into this post.

     

     

    Notice from spectre during IC analysis, during transient analysis `tran'.
        L0: Initial condition computed for node L0:1 is in error by 29.8501 mA (5.97001 k%).
        C2: Initial condition computed between nodes net30 and net31 is in error by 30 mV (100 %).
            Decrease `rforce' to reduce error in computed initial conditions.  However, setting rforce too small may result in convergence difficulties or in the matrix becoming singular.

     

    Thank you again for your help and have a nice weekend!

     

Reply

  • Dear Andrew,

    Thank you very much for your try. With the same exact input.scs (unless you have changed the some of the analysis parameter, which I would love to know and give a try myself), the current starts off at 30.4mA. I do not know how to paste the simulation output into this post.

     

     

    Notice from spectre during IC analysis, during transient analysis `tran'.
        L0: Initial condition computed for node L0:1 is in error by 29.8501 mA (5.97001 k%).
        C2: Initial condition computed between nodes net30 and net31 is in error by 30 mV (100 %).
            Decrease `rforce' to reduce error in computed initial conditions.  However, setting rforce too small may result in convergence difficulties or in the matrix becoming singular.

     

    Thank you again for your help and have a nice weekend!

     

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.