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I'm also new..so I didn't know want is double balanced circuit.
To draw layout..u nedd the transistors or the schematic diagram. then turn it to LAyout.
In matching there are many things related nad it's very hard to say...
few tips..
use the same transistor as a primitive cell to make the layout of the full schematic
common centroid method
use(if possible) only on nwell for all ptype transistor
I think for the double balanced circuit , if the transistors are common source, you can draw them together to have a good match, if not it will be hard to draw the connection lines. you can read some books, such as" the art of analog layout "
If you really need help you should be more precise. Answering this kind of question is quite difficult without any basis. That always leads to wrong or unapropriate answer. If you'll post a more precise question I'm sure you'll have more answers who can help you.
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