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simatrix technologies +btm layout
hi
there is one institute i know...which is doing well...
its Simatrix System technologies...
they offer course and placement for students at very nominal price....
they teach VLSI both Digital and Analog design....
u can give a try...
my friend got placed...
Re: What r the considerations for placing MATCHED BJT ARRAY
NOT abt the matching of BJTs. The placement of the BJT matched array w.r.t
other devices ,axes...etc. Any way Thnx for Ur reply Sunny.
Regards
Mahendra
drc violation definition
Make sure tht contacts are covered with respective layers.
For example Via 1must be covered with both Metal 1(down layer) and Metal 2 (upper layer).
Regards
Mahendra
1.. When drawing the layout of a MOS, is it a good idea to put M1-M2 (matel1-metal2) and M2-M3.. contacts directly on the drain/source area of the transistor, just beside the gate? Or is it better to extend the M1 outside of the MOS and put all the contacts on the extension?
Depends on the...
Re: layout question
HI
The digital and analog blocks can be separated by TRENCH(TRIPLE WELL ISOLATION,DEEP N-WELL Etc),If ur process permits.
If ur process not permits any of the above,U can use N-WELL RING with more than 4 times the minimum width followed by P-type Guard ring.
The digital...
Re: layout techniques ?
ART OF ANALOG LAYOUTS is the best book to follow.
But start with JACOB BEKAR to understand fundamentals.
All the best.
regards
Mahendra
Hi all
I want to match Differential pair with offset <100uV any matching techniques u aware other than Common centroid, plz help me.Thanx in advance.
Regards
Mahendra
Lambda is nothing but the twice the channel length.
So 2lambda=.25
lamda=.125
LAMBDA IS NOT THE OPTIMAL SOLUTION.IT IS USED FOR DESIGN REUSE.
Taking values more than .125 is prefferable.
Among .1
.125
.15
I would prefer .15 and more.
Regards
Mahendra
HI
Thanx for the reply.
if low frequency circuit then how it reacts for the latch-up???
Let us discuss with one example,Low frequency OP-AMP.ALL SUBSTRATE CONTACTS ARE CONNECTED TO THE POWER RAILS. What r causes of latch-up in this case??
Re: I have some doubts
Mismatch is a time independent random variation in identically designed elements.
It can occur due to process,electrical parameters.
Gradients between the two identically designed devices can be eliminated by arranging the devices in common centroid or interdigitiged...
The main points when BJTs matched:
1.Aspect ratio
2.Gradient cancellation
Gradient cancellation my be done with normal centroid based arrangement.But still
u have options.
1.AABAA
AACAA
The above configuration saves the area BUT by increasing mismatch.
ASPECT RATIO: 5:2 =2.5:1...
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