[SOLVED] how to get gm/id plot vs vgs in cadence virtuso

[ddis]

hi all,

how to get gm/id plot vs vgs in cadence virtuso

what we get from this curve ???????

whats the interpretation????

you can refer to this URL

**broken link removed**


go to T04 small signal model

 

[jardila]

Hi,

To get gm/id plot you can setup a simulation with the schematic that is showing in the following figure.



Then you must to do a parametric simulation with Vgs as variable. After this, you can use the calculator tool in order
to read the gm and id of the component.

The interpretation is the following:

gm/id is a measure of the sensitive of the device with respect to its current polarization. With the results of
this simulation you can see that as the vgs increases the gm/id decreases, in other words, the sensitive of the
device (gm) to converte voltage (vgs) into current (ids) decreases for the same current polarization.

Best regards