COAXIAL DATA COMMUNICATION WITH REDUCED EMI

摘要

Data communication having improved electromagnetic interference (EMI) rejection when communicating through a coaxial cable is provided by using differential transmission and/or reception through a common-mode choke and a dissipative element resulting in extremely low radiated emissions and high immunity to external radiation interference in a low-cost way.

主权项

1. A transmission circuit using a coaxial cable having a center conductor and a shield, comprising:
an integrated circuit comprising a differential driver having first and second outputs; a common mode choke coupled between the first output of the differential driver and the center conductor of the coaxial cable, and between a first ground node and the shield of the coaxial cable; a terminating impedance coupled between the second output of the differential driver and the first ground node; and a dissipative element coupled between the shield of the coaxial cable and a second ground node.