bestvlsi
Junior Member level 1
Hi All,
Ive got 3 questions regarding layout of current mirror and differential amplifier:-
Q-1. Ive got a current mirror with the pairs having large widths such that their finger numbers are 100 and 200 ( so as to keep the finger width <10 um )... now for this if i go for common centroid it will take lots of time for routing... so my question is what can i do for matching them ... interdigitization is an option but it will lead to a long transistor structure... whereas common centroid will take huge time to even route ..?
Q-2. This question is more of a confirmation from you guys ... Statement is :- we should try to keep the finger width < 10 um while doing layout... For the case mentioned in Q-1 its 10um ... is this finger width ok?
Q-3. Do we need to put dummy pair for differential pairs too?
Thanks all.
Regards.
Ive got 3 questions regarding layout of current mirror and differential amplifier:-
Q-1. Ive got a current mirror with the pairs having large widths such that their finger numbers are 100 and 200 ( so as to keep the finger width <10 um )... now for this if i go for common centroid it will take lots of time for routing... so my question is what can i do for matching them ... interdigitization is an option but it will lead to a long transistor structure... whereas common centroid will take huge time to even route ..?
Q-2. This question is more of a confirmation from you guys ... Statement is :- we should try to keep the finger width < 10 um while doing layout... For the case mentioned in Q-1 its 10um ... is this finger width ok?
Q-3. Do we need to put dummy pair for differential pairs too?
Thanks all.
Regards.