Hello all,

I'm required to design a fully differential amplifier with CMFB.
the minimal requirements are:

Vdd=2 [v]
closed loop gain=2
Dynamic range at output, DR >80 [db]
settling error<0.5 mV
settling time<50 ns
load capacitance 10 pF
phase margin >60 degrees
power keeping low as possible

I would like to get some ideas for specific circuits that can satisfy those requirements.
any other tips for this design are very welcomed!

thanks in advaned!

 

Welcome to AAC!

Is this schoolwork?

 

Welcome to AAC!

Is this schoolwork?

Yes, I'm looking to get some ideas for good circuits that will a good opening start for my design.

 

Thread moved to Homework Help.

The rules for Homework Help are that you must show what you have done so far. Only then we can give you feedback and guidance. We will not do your homework for you.

 

we are not sure if it is a smart idea to continue with this circuit. the phase margin needed is quite big.

 

we are not sure if it is a smart idea to continue with this circuit. the phase margin needed is quite big.

Circuit in question:

The transistor symbols are non-standard. Are they supposed to be enhancement mode MOSFETs?

Using humps with connection dots went out of style decades ago...

 

yes those are enhancement MOSFETS.