a question about the noise simulation with Hspice

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gdhp

Joined: 07 Jan 2005
Posts: 119
Helped: 1

28 Feb 2008 4:32 a question about the noise simulation with Hspice

HI all

I want to simulate the noise of an OPAMP with Hspice. From the log file, i can see such as the following at one frequency!

element 5:mi151 5:mi123 5:mi150 5:mi100 5:mi156
rd 0. 0. 0. 0. 0.
rs 0. 0. 0. 0. 0.
id 1.339e-26 4.355e-28 7.686e-26 0. 0.
rx 130.6988m 15.2482m 120.2688m 1.3594u 837.8564n
fn 6.136e-23 1.027e-24 1.944e-23 0. 0.
total 6.137e-23 1.028e-24 1.951e-23 0. 0.

So How to understand the above table, what is the total mean?
And how can i know the every MOSFET contribution to the total noise?

Thanks very much

Added after 59 minutes:

Another if i change the thermonoise model, the results are changed a lot.

what's the ploblem?