The total PSRR power supply rejection ratio is 102dB.
Of this is 80dB thanks to LM317.
For even better PSRR you can use @Elvee D-Noizator:
Of this is 80dB thanks to LM317.
For even better PSRR you can use @Elvee D-Noizator:
D-Noizator: a magic active noise canceller to retrofit & upgrade any 317-based V.Reg.
✪ A simple circuit that transforms a good, clumsy workhorse like the LM317 into a superreg so easily that you do not even need to cut a single track. ✪
✪ It must be too good to be true.... or ✪
.........................................................................................................................
It's Christmas!!! 
The present SOTA...✪ It must be too good to be true.... or ✪
......................................................................................................................... It's Christmas!!! 