make asearch for a paper from sackinger (it is public domain)
Other solutions are to increase the output conductance of all critical transistors, to improve matching and to reduce all capacitances contributing to PSRR
differential siganling. put decoupling capacitance in parrallel with the power vdd and vss. watch out the bonding pad inductance effect which may oscillate with the cap.
Maybe, the most discuss about PSRR is abut the ouput stage.
The relation between the amplifier transisor of output stage andpower supply either positive or negative in high frequency is dealed with.
Due to increase frequence making the amplifier transistor look like short the gate and drain, so the amplifier transistor of ouput stage is like a diode connection between the power supply and the ouput, thus, the output follws the power supply variation that decreses the PSRR.
So , generally, the cascade transitor of ouput stage can improve the PSRR.
Or other ways making the relation weak about the power supply and output port at high frequence are also ok.