DC simulation with spiral inductor

[Fred WONG]

Hi all,

I am confused when I simulate a simple common drain circuit with spiral
inductor connected to the source of nmos and then ground. I perform dc
simulation and it shows me that it can't converged. When I remove the spiral
inductor, it works fine...

Why???

Cheers,
Fred

 

[Andrew Beckett]

On Sat, 24 Sep 2005 21:54:47 +0800, "Fred WONG" <fred_wfl@hotmail.com> wrote:

Hi all,

I am confused when I simulate a simple common drain circuit with spiral
inductor connected to the source of nmos and then ground. I perform dc
simulation and it shows me that it can't converged. When I remove the spiral
inductor, it works fine...

Why???

Cheers,
Fred

Not enough information, sorry...

This will depend a lot on the spiral inductor model, which simulator you're
using, how long a piece of string is, and so on...

Andrew.