pablomarco
Newbie level 5
Hi everyone,
I would like to ask a question about the small-signal model of the Improved Wilson Current mirror.
First of all, RL represents the resistance that is seen when we look up through the drain of M4.
I am confused about the G3 node because as can be seen in the small-signal model, the G3 node has been represented as if it was connected to the source of M4(Drain of M1) so the equation continues with rds1 // (RL+ 1/gm4).
To be honest, I personally think that it should have been written as RL // (rds1+ 1/gm4) since the G3 node is connected to the drain of M4(Gate of M4).
Could you please tell me If I am wrong?
Kind regards,
Pablo Marco
I would like to ask a question about the small-signal model of the Improved Wilson Current mirror.
First of all, RL represents the resistance that is seen when we look up through the drain of M4.
I am confused about the G3 node because as can be seen in the small-signal model, the G3 node has been represented as if it was connected to the source of M4(Drain of M1) so the equation continues with rds1 // (RL+ 1/gm4).
To be honest, I personally think that it should have been written as RL // (rds1+ 1/gm4) since the G3 node is connected to the drain of M4(Gate of M4).
Could you please tell me If I am wrong?
Kind regards,
Pablo Marco