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USB Interface from an EMC Point of View- Part I

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Jun 10, 2021

Today's discussion centers around the Universal Serial Bus, commonly known as USB.  We'll be discussing the interface from an EMC point of view, and talk about technologies, hardware and components, PCB layout, and more.

FIGURE 1:

REFERENCED IMAGES IN THIS PODCAST:

Figure 1- Pin Assignment of the USB Interface

FIGURE 2:

Figure 2- USB Cable Construction

FIGURE 3:

Figure 3- USB Interface Bidirectional and Symmetrical

FIGURE 4:

Figure 4- Symmetrical transmission

FIGURE 5:

Figure 5- High Quality Circuit Design

FIGURE 7:

Figure 7-Differential Data Mode 2

 

FIGURE 8: 

Figure 8- Basic Circuit of a symmetrical signal filter

FIGURE 10:

Figure 10- Transient Limitation with Diodes

FIGURE 11:

Figure 11- USB 2.0 Complete Diagram