Mos Drain-Bulk Junction current

Hello,

I would like to ask you in which way it is possible to obtain the V/I IBIS
curve trough Hspice simulation.

My supply voltage is 3.3V and my output buffer is a standard C-MOS.
Considering the pull-down element, I force on the buffer output -6.6 V in order
to obtain the first point of my IV curve.
Thus I turn on the N-Mos Drain-Bulk juncition and the current value is like
1e20 A.
I have to use a resistor in order to limit this current .

I would like to know what is the resistor to use (Rref, R_pck , ..) and if I
have to add other elements like Cref Rref Vref, Rload, Cload .....

Thank you in advance for your answer , Your Sincerelly

Riccardo Giordani

                                                                         e-mail:
riccardo.giordani@st.com
Received on Wed Sep 29 07:48:32 1999