Схемы, платы, компоненты

Цитата из Библии (по поводу якобы уменьшения уровня излучения размазыванием спектра) 

This is often done intentionally, in order to meet regulatory standards

on interference (EMI) by “spreading” the emitted switching signals

over a range of frequencies (see Figures 9.53 and 9.54). Although there

is some rationale for resorting to this measure when other options are

exhausted, we’re not wild about this practice, which paradoxically encourages

sloppy design that emits more total radiated power. As NASA

engineer Eric Berger remarked, “When I first heard about this practice,

I was appalled. The radiated energy is not reduced, just the peaks in the

frequency domain are. This is like getting rid of a cow pie by stomping

on it.”