Different processes with the same process size

[vinayshivakumar]

Hi ,
I have a few queries :

What is the difference between vt classes in a library ? What factor do they change to change the threshold voltage (vt) ?

What is MTCMOS ? Any Docs on that ???

What is the difference between a mixed mode process and a normal cmos process - for example IBM has 3 variants of the 90 nm cmos - low power(lp) , mixed mode(rf) and logic cmos (sf)

 

[silencer3]

to change the Threshold voltage Vt, Gate oxide thickness is changed. lower the Vt, higher is threshold; but fast transistor switching

MTCMOS - Multi Threshold CMOS (Mixed Vt design)

Mixed mode process : GDS will contain transistors with different threshold voltages
Normal CMOS process: all the transistors in the design uses same threshold voltage

 

[vinayshivakumar]

do you have anydocuments on MTCMOS

 

[kumar_eee]

Just check in our Ebooks forum.. There is a book on MTCMOS circuit design I belieive..

 

[xinsu]

If you can study the different vt layout,you can have more details

 

[research235]

hi Vinay

If u have good time to know the details, read the book Digital integrated circuits by

anantha chandrakasan and co. authers.

Its considered as bible for digital design.

BEST OF LUCK .

SURESH