wangkes9
Member level 2
I want to get the Ro of nmos when it is in saturation in a common source circuit to calculate the gm*Ro.
In cadence spectre DC sim ,I open the calculator -> hit the 'op' option-> select the nmos -> and select the Ron in the list. But the result seems not good. The value of Ron will increase with Vds. But I think in high Vds voltage, the Ron will decrease.
the Ron in spectre is really the output resistance of mos in saturation , or just only in linear region. If not ,how to sim it.
Thanks.
In cadence spectre DC sim ,I open the calculator -> hit the 'op' option-> select the nmos -> and select the Ron in the list. But the result seems not good. The value of Ron will increase with Vds. But I think in high Vds voltage, the Ron will decrease.
the Ron in spectre is really the output resistance of mos in saturation , or just only in linear region. If not ,how to sim it.
Thanks.