Do USB Data Wires (D+/D-) have 90 ohm differential impedance and single ended 45 ohm impedance to ground and if so how is this made? - Electrical Engineering Stack Exchange
USB trace impedance calculations, with termination resistors - Electrical Engineering Stack Exchange
Routing Requirements for a USB 2.0 Impedance Interface on a 2-Layer PCB | Blog | CircuitMaker
Agilent Technologies N5416A Automated USB 2 - ppt video online download
First attempt at USB differential pair routing on a 2 layer board. Acceptable?
pcb design - Advice for 90 Ohm traces of a USB 2.0 HUB - Electrical Engineering Stack Exchange
PCB LAYOUT AUTHORITY: SuperSpeed USB 3 Design Guide
PCB: can Unbalanced USB differential pair work? - Interface forum - Interface - TI E2E support forums
Using the sensitivity analysis of the Si9000e transmission line field solver to achieve both differential (Zdiff) and common (Zcommon) impedance requirements
Switching in USB Consumer Applications | Analog Devices
Routing Requirements for a USB 2.0 Impedance Interface on a 2-Layer PCB | Blog | CircuitMaker