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EMI Suppression for Firewire & USB 2.0 Applications Overview
A primary problem for the Firewire IEEE1394 and USB2.0 as with the USB1.1 port designer is common mode noise conducted through the power and signal lines from various sources. EMI susceptibility on data/power lines is also a major concern. The use of a common mode choke in this application will provide a complete low cost, effective, modular, filter solution. Steward’s CM2722 (for single and dual ports), CM3822 (for tri ports), and CM5022 (for quad ports) series of components have the lowest normal mode impedance in the industry and suppress a wide range of digital common mode noise. Normal mode impedance is net circuit impedance i.e. the impedance seen by the differential signal.
CM2722 Datasheet
