ytass
Junior Member level 1
Hi there,
This is my first time doing a differential pair layout, and I am hoping to gain some helpful pointers. My partially complete differential pair is shown in the attachment (screenshot). I am using Cadence Virtuoso.
My transistors are W/L = 56um/4um. I am using the 2D structure
dAsBdBsAd
dBsAdAsBd
where d = drain, s= source, and A and B are the inputs of the diff pair (NMOS).
My question is, is it ok to route the metal2 wires for the inputs like I have done? I am routing them over the top of other met1 contacts.
I am not sure how to route the drain connections. I would really appreciate some help here.
Please provide any other suggestions.
Do I need to add dummy transistors? If so, how do I connect the gates and the source connections of those transistors?
Thank you very much.
This is my first time doing a differential pair layout, and I am hoping to gain some helpful pointers. My partially complete differential pair is shown in the attachment (screenshot). I am using Cadence Virtuoso.
My transistors are W/L = 56um/4um. I am using the 2D structure
dAsBdBsAd
dBsAdAsBd
where d = drain, s= source, and A and B are the inputs of the diff pair (NMOS).
My question is, is it ok to route the metal2 wires for the inputs like I have done? I am routing them over the top of other met1 contacts.
I am not sure how to route the drain connections. I would really appreciate some help here.
Please provide any other suggestions.
Do I need to add dummy transistors? If so, how do I connect the gates and the source connections of those transistors?
Thank you very much.