Hi WimRFP,
Thank you for your replay.
The beginning of your explanation is exactly what I thought when I wrote this topic.
However, I did not understand your last sentence: “The voltage division is not change if we chance the output resistance and gm of M3”.
Please, could you explain your point of view?
For me, the impedance of M3 (1/gm and ro) and the impedance of M2 are separated things. So, if you change one of these resistances, the voltage division will be changed. When W/L is increased for M3, the output resistance of M3 is decrease, and gm is increase. Therefore, the output resistance of M3 is decreased. Am I right or not?!
Thank you.
Hi dick,
Thanks too!
1) Do you think that the shielding property of cascade techniques is analogous to a “voltage division” and therefore, the output resistance of M2 must be low compared to M3?
2) By the way, What do you mean with “M2 CDD?”.
Regards.