How would you set up your HSPICE deck for using multiple thr

How would you set up your HSPICE deck for using multiple threshold voltage for the transistors?

Solution

hi,

you can also do the following:

- if you want just to change the thershold voltage without playing with the body bias value, you can change the parameter VTH0 (which is the zero-bias threshold voltage for NMOS for example)in you transistor statment. you should go to ur technology file to check out the current value.

- threshold voltage depends on body bias through the well-known relation:

Vt=Vt0+gamma*(SQRT (|-2*phi-Vsb|) - SQRT(-2*phi|))

so Vt depends on Vsb (source to body voltage) and other parameters are fixed.

But if you get not work reviewing this document I\'ll let you in the link is the user manual.

http://cseweb.ucsd.edu/classes/wi10/cse241a/assign/hspice_sa.pdf