Question about differences in 180nm and 130nm mobility

[sat123]

180/130nm mobility

1. TSMC 180nm tech nmos transistor has a mobilty of 265cm2/v-sec where as 130nm nmos predictive tech model file shows mobility of 0.05..cm2/v-sec.
such a large variation in mobility is it possible as we go down from 180 to 130nm?

2. if anybody has design procedure for simple 2 stage opamp (90nm) or any related materials pls forward it to sat_mm@indiatimes.com

thanx
-sat

 

[Amar.n]

Re: 180/130nm mobility

1. TSMC 180nm tech nmos transistor has a mobilty of 265cm2/v-sec where as 130nm nmos predictive tech model file shows mobility of 0.05..cm2/v-sec.
such a large variation in mobility is it possible as we go down from 180 to 130nm?

2. if anybody has design procedure for simple 2 stage opamp (90nm) or any related materials pls forward it to sat_mm@indiatimes.com

thanx
-sat

265 is in cm2 whereas 0.05 might be in m2

 

[palmeiras]

Hi sat 123.

1) No.... It is not possible. The unit is wrong.
2) You can take a look in CMOS Analog circuit design of Allen and Holberg. There you will find a design procedure for a simple 2 stage op-amp. Chapter 6, section 6.3.
The procedure shown there is valid for any technology.

Regards.