Tag
usb
2 articles.
- USB 2.0 layout: 90 Ω differential, and where the TVS goes
The impedance, the length match, the capacitance budget and the order of the protection parts — with the numbers and the documents each one comes from.
- How a common-mode choke works, and where it goes on USB
How coupled windings block common-mode noise but pass the differential signal, how to read both impedance curves, and where the choke and TVS go on USB 2.0.