How can I measure Gm with Hspice?

[farzinasadi]

please help me to measure Gm in one circuit with Hspice.

Gm=di0/dvi for achieve this value in one transcoundactor circuit what i should do?
because we should measure dI(out) /dVin but how we can do it?

 

[ankitgarg0312]

please have a look in hspice_mosmod manual..
it gives details on how you can print transconductance of mosfets.

 

[farzinasadi]

i look but i cant find anything for it.
i want that think in hspice to measure Gm at out pout node.

 

[neils_arm_strong]

use the option
.op
this will print the details of your transistor in
the output file.The gms of various transistors and thier regions of operation
will be printed.

 

[multi_booter]

try this it will work
.Probe Gmo(M1)
notice that M1 is the name of your MOS device
you can also plot Vth Vs Vgs or any voltage by using the code below
.Probe Vth(M1)