noise anaylsis in pspice, determine flicker noise in NMOS

[dieyae16]

hi, im to pspice and currently doing a project to determine flicker noise in NMOS transistor. the problem now is when i set for noise enabled and simulate it, the output simulation will give result as below:

* Analysis setup **
.ac DEC 10 0 5
-----------$
ERROR -- Invalid value
.noise V([Vout]) V_Vgs 1
.OP
.LIB "D:\my F.Y.P\pspice schematic\pwrmos.lib"


* From [PSPICE NETLIST] section of pspiceev.ini:
.lib "nom.lib"

.INC "pwrmos.net"

why is there have invalid value for noise? it would really nice if someone can help me with this simple problem.

 

[keith1200rs]

noise anaylsis in pspice

The invalid value is in the ac statement. You cannot do a simulation from zero frequency. Use something like

.ac dec 10 0.01

Keith.

 

[dieyae16]

Re: noise anaylsis in pspice

thank you so much! now my problem resolve