Noise
Suppression
Example
DLP/DLW Series
Mechanism of Skew Improvement
Waveform rises (or falls)
Skew Improve Effect of Common Mode Choke Coil
Example of Skew Improvement by Common Mode Choke Coil
(Test using pulse generator waveform)
Waveform is equivalent to 1000Mbps signal
Current change generates
magnetic flux on a ferrite core
Waveform with intentionally made skew (skew: 100ps)
Skew is improved by common mode choke coil
Electromotive force is
generated on another line
This electromotive force works to
decrease the delay of waveform
Noise Suppression of Common Mode Choke Coil in HDMI Line
Device under test / Transmitter : game machine Receiver : projector
Cable / HDMI categoly2 3m cable
Test resolution / 1080p Deep color 12bit (Data 1.11GHz) DVD play mode
60
55
50
45
40
35
30
25
20
60
55
50
45
40
35
30
25
20
Without filter
DLW21SN900HQ2
Without filter
DLP11SA900HL2
1000 1500 2000 2500 3000 3500 4000 4500 5000
1000 1500 2000 2500 3000 3500 4000 4500 5000
Frequency (MHz)
Frequency (MHz)
Film Type DLP11SN900HL2
(Cut-off frequency is most low in the table below)
ESD protection device only
Test Example of HDMI1.3
Waveform Transmission
~Using ESD protection device 0.05pF~
Signal frequency : 1.11GHz (Deep color 12bit)
Specification
satisfied
Video signal generator
CLOCK
Wound Type
Film Type
Film Type Array
DLW21SN900HQ2
DLP11SA900HL2
DLP2ADN900HL4
DATA
Over 10GHz
Around 4GHz
Cut-off Frequency
Around 6GHz
common mode choke coil ESD protection device 0.05pF
Specification satisfied
Specification satisfied
Specification satisfied
Judge
Rise time: 83.4ps
Fall time: 77.4ps
Rise time: 90.4ps
Fall time: 85.5ps
Rise time: 100ps
Fall time: 97.4ps
Transition Time
Each of common mode choke coil can keep waveform, satisfy the specification.
• Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications because there is no space for detailed specifications. Therefore, please review our product specifications or consult the approval sheet for product specifications before ordering.
!Note
C31E.pdf
Mar.28,2011
151