Invention Grant
- Patent Title: Methods and apparatus for reducing electromagnetic interference resultant from data transmission over a high-speed audio/visual interface
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Application No.: US15692966Application Date: 2017-08-31
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Publication No.: US10462417B2Publication Date: 2019-10-29
- Inventor: William Cornelius , In Jae Chung , Bryan Follis , Pierre Michael , Kofi Boateng , Jongbae Park , Joseph Karaszewski
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Gazdzinski & Associates, PC
- Main IPC: H04N7/10
- IPC: H04N7/10 ; H04N7/015 ; H04N21/4363 ; H04B3/02 ; H04B3/14 ; G09G3/20 ; G09G5/00

Abstract:
Methods and apparatus for reducing electromagnetic interference resultant from data transmission over a high-speed audio/visual interface. In one embodiment, an HDMI source device is disclosed. The HDMI source device includes a wireless interface and an HDMI interface coupled with an active filter circuit topology. The active filter circuit topology includes a pair of differential signal lanes; a passive filter circuit disposed within each of the pair of differential signal lanes; a plurality of active filter circuits, with at least a first active filter circuit disposed on one side of the passive filter circuit and at least a second active filter circuit disposed on the other side of the passive filter circuit; a plurality of diodes, with each of the plurality of active filter circuits coupled with a respective diode; and switching logic coupled with the plurality of diodes. Methods of operating the HDMI source device and HDMI systems are also disclosed.
Public/Granted literature
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