Hi
I'm currently learning about op amps but i'm not quite sure about what the pmos's role is in this specific 2 stage amplifier. To my understanding, for pmos to work it needs to have a more negative gate voltage(Vgs) than its threshold voltage? Is that the case here?
Q: Could someone please explain what the pmos's are doing at the input stage? (i know its a current mirror and what a current mirror does) but I'm not sure how the pmos's work in this case.
thanks
I'm currently learning about op amps but i'm not quite sure about what the pmos's role is in this specific 2 stage amplifier. To my understanding, for pmos to work it needs to have a more negative gate voltage(Vgs) than its threshold voltage? Is that the case here?
Q: Could someone please explain what the pmos's are doing at the input stage? (i know its a current mirror and what a current mirror does) but I'm not sure how the pmos's work in this case.
thanks