What is the difference between nmos, native nmos and medium?

[amic]

native nmos

In the following model What is the difference between nmos, native nmos and medium? which type parameter values shoul I be using for hand calculations?



model name :
; * mosfet :
; * *--------------------------------------*
; * | mosfet type | 1.8v | 3.3v |
; * |======================================|
; * | nmos | n18 | n33 |
; * *--------------------------------------*
; * | pmos | p18 | p33 |
; * *--------------------------------------*
; * | native nmos | nnt18 | nnt33 |
; * *--------------------------------------*
; * | medium nmos | nmvt18 | nmvt33 |
; * *--------------------------------------*
; * | medium pmos | pmvt18 | ---- |
; * *--------------------------------------*

 

[sunking]

basic of native nmos

native : no adjust the Vt when process
medium: most low vt mos

 

[amic]

native nmos

native : no adjust the Vt when process
medium: most low vt mos

I didn't get it. Could you please elaborate on that?

 

[nxing]

nmos native

The big difference is they have different threshold voltage Vth.

 

[sunking]

native nmos vt

yes, as nxing said, the big difference is they have different threshold voltage Vth.
this is to say, for vth of nmos: native<medium<normal.
and you can get more information from the fundry and maybe you study some process knowedge.