The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl Design >> Analog Design >> Optimum number of fingers https://designers-guide.org/forum/YaBB.pl?num=1375802528 Message started by summi on Aug 6th, 2013, 8:22am |
Title: Optimum number of fingers Post by summi on Aug 6th, 2013, 8:22am Dear Forum, Can any one explain what is the basis of number of fingers for a mosfet either high frequency performance or mismatch point of view. I know many times layout decides number of fingers, but i would like to know is there any problem with higher number of fingers (exepct complicated routing) or is diffussion cap keep on decreses with numbr of fingers? Even gate resistance should keep on decrease with number of fingers but some where i heard verticle resistance dominates at some point and gare res keep on increase after words... I am not finding much informtion in books and other resouces so any kind of hint will appriciated. Br, Summi. |
Title: Re: Optimum number of fingers Post by harpoon on Aug 7th, 2013, 12:43am A suggested answer is 4 |
Title: Re: Optimum number of fingers Post by loose-electron on Aug 7th, 2013, 4:56am What is the resistance of your gate stripe vs. the frequency you drive it at, vs, the amount of capacitance present at the gate? |
Title: Re: Optimum number of fingers Post by boe on Aug 9th, 2013, 1:46am harpoon wrote on Aug 7th, 2013, 12:43am:
harpoon, it is said the answer is 42... ;-) - B O E |
The Designer's Guide Community Forum » Powered by YaBB 2.2.2! YaBB © 2000-2008. All Rights Reserved. |