FET Layout: short width and more fingers vs long width and less fingers

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bouchy

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For a fixed device area and fixed length, what is difference between using short width and more fingers compare to long width and less fingers?

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Bouchy
 

FET Layout question

more finger can be make the device more match with others. But too short width will have delta width effect
 

Re: FET Layout question

Usually we use width between 2u to 20um.

For small finger numbers with lager width is prepared for paracitics.

Yibin.
 

FET Layout question

We ofen mixed 2 mos (Current Mirror ) by finger.
We get the same Rs of MOS , and can improve matching .
 

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