can you please refer me to the rail to rail input stage (ntype and ptype input stage) of the current mirror OTA amplifier,
I have attached you the simple Ntype input stage only but I dont know how to add the P stage to the input
I cannot draw you the circuit but I try to describe the steps to convert above circuit to rail2rail:
1. add a PMOS differential pair to the inputs with PMOS tail current source but with open drain connections
2. to the open drains connect 2 new NMOS current mirror inputs.
3. connect previous NMOS current mirror outputs to the posted circuit's diode loads (M31 and M41)