Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Common centroid Better Matching for M1 9 fingers and M2 fingers

Status
Not open for further replies.

laxman.vlsi

Newbie
Joined
May 25, 2011
Messages
5
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,325
Can somebody help me to get the better common centroid matching for M1(9fingers)And M2(9fingers).

thanks
Laxman
 

Hello

d d d d d d d
d d 2 1 2 1 d
d 2 1 2 1 2 d
d 1 2 1 2 1 d
d 2 1 2 1 d d
d d d d d d d

d = dummy

For saving die area you could give up border dummies.
 
D B A B A B A B A B D
D A B A B A B A B A D
I think this will provide better matching, here D is the dummy transistors and A & B are the transistors 2 be matched
 
D B A B A B A B A B D
D A B A B A B A B A D
I think this will provide better matching, here D is the dummy transistors and A & B are the transistors 2 be matched

I think this looks better, thankq

---------- Post added at 11:11 ---------- Previous post was at 10:11 ----------

D B A B A B A B A B D
D A B A B A B A B A D
I think this will provide better matching, here D is the dummy transistors and A & B are the transistors 2 be matched

In that case we can not share(say suppose i wanted to share M1 source & M2 source) for less space.
how about this pattern:
D A B B A A B B A A B D
D D A A B B A A B B D D
 
Last edited:

if u want to share u can use this
DABBABABBAD
DBAABABAABD

Regards
arun

---------- Post added at 18:40 ---------- Previous post was at 18:37 ----------

i think its better don't go for sharing, it will increase stress due to STI
 
D A B B A A B B A A B D
D D A A B B A A B B D D


it's better...
 

    V

    Points: 2
    Helpful Answer Positive Rating
One more option is, You can break the width of the transistor to half of its value ( if it does not affects the design ) and double the no. of fingers.

So u will be having even no. of fingers and can easily get common centroid matching
 
Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top