Thanks for the info. What am wondering is does it really effect if I do a cross coupled matching with the devices shared.
A1 B1
B2A2
<----Sa---->A1<--------------------Sb-------------------->
<--------------------Sa-------------------->B1<----Sb---->
<----Sa---->B2<--------------------Sb-------------------->
<--------------------Sa-------------------->A2<----Sb---->
Does the effects not nullify and the avg stress both the transistors see should be the same?
Does the Sa and Sb vary vertically ? does it vary for different set of blocks with transistors having same L and W?
Regards,
Sandeep