US 12,413,215 B2
Common mode termination matching method for digital communications
Haihui Lu, Shanghai (CN); David D. Brandt, New Berlin, WI (US); Caleb J. Palagyi, Sagamore Hills, OH (US); Joseph M. Futey, Seven Hills, OH (US); Brian R. Campbell, Brecksville, OH (US); Neal R. Krejci, Seven Hills, OH (US); and Zhijie Gong, Shanghai (CN)
Filed by Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US)
Filed on Feb. 6, 2024, as Appl. No. 18/434,480.
Prior Publication US 2025/0253835 A1, Aug. 7, 2025
Int. Cl. H03K 5/1252 (2006.01); H02H 9/00 (2006.01)
CPC H03K 5/1252 (2013.01) [H02H 9/005 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A network interface component, comprising:
a transformer circuit comprising a plurality of ports including a first set of ports and a second set of ports;
a physical layer circuit coupled to the transformer circuit at the second set of ports; and
a cable side circuit coupled to the transformer circuit at the first set of ports, wherein the cable side circuit comprises:
a connector port comprising:
a receptacle; and
a set of output ports that couple to a subset of the first set of ports; and
a common-mode interference dissipation circuit comprising:
one or more variable resistors each having a first terminal and a second terminal; and
a capacitor coupled in series with the one or more variable resistors and having a first terminal and a second terminal;
wherein the first terminal of the one or more variable resistors is coupled to a port of the first set of ports, the second terminal of the one or more variable resistors is coupled to the first terminal of the capacitor, and the second terminal of the capacitor is coupled to a chassis in an industrial automation environment.