Design an opamp with 0.1-3v common mode input voltage and 0.3-4.5 v output voltage and 5v supply voltage.
Explain what type of active and load transistors(nmos,pmos,bjt or bicmos with reasoning) do u use?
the requirements would be satisfied by a simple miller op amp, no class-ab needed. input pair can't be a single pmos, you'd need cascaded pmos or darlington pnp so you don't crush your differential to single-ended conversion, else use folded and you won't need cascaded pmos.
Why class AB could meet the output common voltage requirement? by using Class AB, I think the input of class AB driver also need 0.3-4.5 v swing. if we could make Class AB driver`s output meet output common voltage requirement, why still need a class AB driver? Class AB is used just for low output impedance and small power consuming?
Other questions were easy ..like finding gain of single stage operational amplifier.. what are two capacitances present in a diode and give an example of current mirror and explain its operation with respect to current mirroring..