How to layout the cascode opamp on RAZAVI'S book ,figure 9.48?
Any suggestion?
In figure 9.48,
(1) put the M1,M2 ,M1P,M2P in the middle of M9 ,M10 ,M3, M4, M5, M6, M7, M8
(2)put the M1, M2 ,M1P,M2P just in the left or right of M3 to M10
which one will be better?
which size of M1,M2 you use in design a cascode opamp?
I mean ,when layout the cascode opamp circuit,
if the fingers of M1,M2 is large,then the w/l will be too small.
Which size of w/l will be suitable?2.5 /1 or else.
I have read the lecture sent by sunking,
The lecture introduces a way to draw cascode opamp layout of same L.
Here I have a question:
How to draw the layout when the Length of all MOS transistors are not same?
For a cascode opamp ,if increase the Length of M5,M6,the gain will increase too.
yes ,the W is the same,
but when the length is different, how to place?
The total length (include the dran and source length ) of each of the stacked mos transistors should be equal?