Better way for Inverter Layout design

[masummist]

Hello,

Could anyone please tell me which one is optimized and better way to design an inverter layout?

Inverter Dimension
PMOS width is 4u
NMOS width is 2u



Thanks

 

[erikl]

The right one (NMOS with 2 fingers, too) is the better layout: less input gate series resistance, less parasitic output capacitance, and saves real estate area.

 

[svmk]

As erikl said, right one is better. You should always try to minimize drain cap and try to use minimum area...