Circuits with Convergence Problems

[shaikhsarfraz]

Hi,
I have a peculiar case.
I need some CMOS circuits which are facing convergence problems during Spectre simulation.
Some generic blocks like Switching regulators do give some convergence problems during simulation. Can anybody give me the schematic of such circuits which are facing convergence problems.

thanks
sarfraz

 

[xiongshoufen]

are you software engineer?

 

[shaikhsarfraz]

Hi,
No I am not a software engineer. I am an analog professional. I am studying about the causes of convergence problems in CMOS circuit simulation using EDA tools.

thanks
sarfraz

 

[pixel]

What exatly problems? Only internal simulation error, or innacuracy because of unproper modelling.

 

[shaikhsarfraz]

Hi,
I need circuits with convergence problems so that I can get insights into the way tool works. I want to solve the convergence issues.

thanks
sarfraz