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Music servers and other computer based digital audio technologies.

RE: When charging their battery, yes. nt

Well, when running, batteries or no, all of the various voltages are generated by switchers. Not that they necessarily cause anymore net ripple at a given node than would be there anyway due to load induced plane fluctuations, but there you go. Especially sensitive, or noisy circuits may be decoupled with an LC filter.

Battery life and thermal management is King, Queen and Joker so it's switching power supplies and class D amplifiers.

Rick


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