Simple 2 stage CMOS Op Amp with Miller compensation.
Feed a current of 8uA to Ibias. The op amp needs a DC power supply of +1.8V to work The differential inputs are V+ and V-, while the output of the op amp is Vout.
note that C2 in the schematic is an external capacitor that needs to be connected to the output of the Vout of the op amp.
No external hardware requried