EMI Suppression Filters (EMC and Noise Suppression)Noise suppression effects of common mode choke coils in HDMI interfaces

Device under test/
Transmitter: game machine
Receiver: projector
Test resolution/
Cable: HDMI® categoly2 3m cable
080p Deep color 12bit (Data 1.11GHz) DVD play mod
Noise Suppression of Common Mode Choke Coil in HDMI® Line

- Test Example of HDMI® 1.3 Waveform Transmission -

- Using ESD protection device 0.05pF -

Signal frequency: 1.11GHz (Deep color 12bit)

Test Example of HDMI® 1.3 Waveform Transmission
Test Example of HDMI® 1.3 Waveform Transmission
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Wound Type DLW21SN900HQ2 Film Type DLP11SA900HL2 Film Type Array DLP2ADN900HL4
Cutoff frequency 10GHz or higher About 6GHz About 4GHz
Judgment Standard clear Standard clear Standard clear
Transition time Rise time: 83.4ps
Fall time: 77.4ps
Rise time: 90.4ps
Fall time: 85.5ps
Rise time: 100ps
Fall time: 97.4ps

Each common mode choke coil can keep the waveform and satisfy the specification.

Selection chart for common mode choke coils

Selection chart for signal lines

Selection chart for power lines