Category: Hardware
Currently available LDO's are immensely noisy and not applicable to Audio designs. I design own LDO's by the formula Voltage reference ( such as LM431 ) -> heavy filter at the output -> heavy, RC filter after and in series to the output -> buffer -> heavy, RC filter -> output amplifier -> power transistor ( s ). Optical isolator can be inserted in this chain, too. Whether the optical isolator rejects or introduces noise is questionable, but, this is not the question. The question is whether an audio quality, IC, which, requires, just, resistors, capacitors and output transistors is good and whether AD should make such. Here is the idea :
