Condition for M2 to be in saturation is:- Vsd ≥ Vsg - |Vthp| -> -Vd ≥ -Vg - |Vthp| -> Vd ≤ Vg + |Vthp| -> Vo ≤ Vg + |Vthp| For Vg=1.25V (which is within the spec of the ICMR) ; Vo=2.5V(set through feedback in this example) ; |Vthp| = 1V 2.5 ≤ 1.25 + 1V (Condition is not met) So if you have a common mode input voltage of 1.25V and output common mode voltage of 2.5V then M2 will not be in saturation and the the 3V(p-p) will face distortion .
Respected sir, I have a doubt since in previous video u used different formula (R=1/(λ*Id)) to calculate the resistance and so I used that formula but by using that the resistance is coming different as calculated in this video. So sir i need your suggestion regarding that. That's all sir thanks.
Condition for M2 to be in saturation is:-
Vsd ≥ Vsg - |Vthp|
-> -Vd ≥ -Vg - |Vthp|
-> Vd ≤ Vg + |Vthp|
-> Vo ≤ Vg + |Vthp|
For Vg=1.25V (which is within the spec of the ICMR) ; Vo=2.5V(set through feedback in this example) ; |Vthp| = 1V
2.5 ≤ 1.25 + 1V (Condition is not met)
So if you have a common mode input voltage of 1.25V and output common mode voltage of 2.5V then M2 will not be in saturation and the the 3V(p-p) will face distortion .
Respected sir,
I have a doubt since in previous video u used different formula (R=1/(λ*Id)) to calculate the resistance and so I used that formula but by using that the resistance is coming different as calculated in this video. So sir i need your suggestion regarding that. That's all sir thanks.
thank u somuch sir
ty