noise anaylsis in pspice, determine flicker noise in NMOS

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dieyae16

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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.
 

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.
 

Re: noise anaylsis in pspice

thank you so much! now my problem resolve
 

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