US 11,903,123 B1
Common-mode filtering for converting differential signaling to single-ended signaling
Shaowu Huang, Sunnyvale, CA (US); and Dance Wu, Palo Alto, CA (US)
Assigned to Marvell Asia Pte Ltd, Singapore (SG)
Filed by Marvell Asia Pte Ltd, Singapore (SG)
Filed on Mar. 10, 2022, as Appl. No. 17/654,316.
Claims priority of provisional application 63/159,345, filed on Mar. 10, 2021.
Int. Cl. H05K 1/02 (2006.01); H04B 1/40 (2015.01); H03H 11/04 (2006.01)
CPC H05K 1/0245 (2013.01) [H03H 11/04 (2013.01); H04B 1/40 (2013.01); H05K 1/0243 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An interface in a radiofrequency (RF) wireline communications system, the interface comprising:
a physical layer transceiver configured for coupling between a differential wireline channel medium and a functional device, the physical layer transceiver being an integrated circuit device having first and second differential wireline conductors configured for coupling to the differential wireline channel medium, and having first and second differential input/output conductors extending toward the functional device;
an impedance element configured to terminate a first one of the first and second differential input/output conductors to a ground of the communications system between the physical layer transceiver and the functional device, a second one of the first and second differential input/output conductors being configured for coupling to a single-ended cable that is configured for coupling to the functional device; and
a common-mode filter coupled, between the physical layer transceiver and the functional device, to both of the first and second differential input/output conductors.