4 ms·
These seem to have become much less common. I'm guessing better filtering in devices themselves and possibly better cable construction?
by aaronax 3y ago
These seem to have become much less common. I'm guessing better filtering in devices themselves and possibly better cable construction?
- jareklupinski 3y agoFrom https://www.ti.com/sc/docs/apps/msp/intrface/usb/emitest.pdf https://www.ti.com/sc/docs/apps/msp/intrface/usb/emitest.pdf : > If a single ferrite bead is used it is not usually necessary to also have the separate beads as shown in Figure 8 Yup, it's probably cheaper to put a few small ferrite beads on the board than to put a big one on the cable. Being a differential signal, I never understood why USB cables would _need_ them, but seeing it on a premium cable inspires the feeling that you bought a better product? I also think reduced 900MHz interference from cordless phones (remember those?) made homes quiet enough that the bead became more of a value-add for most applications. Just guessing...