how to simulate output noise voltage in Hspice?

[incol]

output noise site:edaboard.com

Could you tell me how to simulate output noise voltage in Hspice. Is output noise voltage the Vout voltage when Vin=0v? And is this a AC simulation?
thanks!

 

[flushrat]

noise voltage hspcie

.ac and .noise analysis

 

[incol]

.ac and .noise analysis

I find a sentence from the manual:
.NOISE V(5) VIN 10

but I dont understand it, is V(5) a node that on what we want to see the noise?
and what does VIN 10 mean?

should I add another sentence: .ac ?


thanks

 

[paji_007]

you need another sentence:.ac
v(5) is the output voltage,and the VIN is the input node,10 is the output number