I am DIYing a headphone amp with a LDO regulator which has lower PSRR than regular regulators, can it effectively filter out the broadband noise generated by the switching P/S?
I presume this is a little chhepp thing, that by the sounds of it has not been through any EMC testing, so you cannot use it as a global example of SMPS and SMPS designs.Yes you CAN hear a SPS. I have an LED globe which makes so much EMI (either conducted or radiated) it make AM radio reception practically impossible.
Its a little discussed topic but makes the argument for retaining incandescent globes acceptable IMHO.
it is silent.
Not the best examples, as you've said the earliest. TV's not that many CRTs these days, and you wouldn't use the PSU out of a flash for audio.As an example, I can hear TV flybacks and most flash units.
By the way, the two earliest and most used SMPS over the whole Earth surface.