DLW21SN371SQ2L Datasheet, PDF (4/39 Pages) Murata Manufacturing Co., Ltd. – SMD/BLOCK TYPE EMI Suppression Filters

Noise
Suppression DLP/DLW Series
Example
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
Waveform with intentionally made skew (skew: 100ps)
Skew is improved by common mode choke coil
Mechanism of Skew Improvement
Waveform rises (or falls)
Current change generates
magnetic flux on a ferrite core
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
Without filter
25
DLW21SN900HQ2
20
1000 1500 2000 2500 3000 3500 4000 4500 5000
Frequency (MHz)
60
55
50
45
40
35
30
Without filter
25
DLP11SA900HL2
20
1000
1500
2000
2500 3000 3500
Frequency (MHz)
4000
4500
5000
Test Example of HDMI1.3
Waveform Transmission
~Using ESD protection device 0.05pF~
Signal frequency : 1.11GHz (Deep color 12bit)
ESD protection device only
Film Type DLP11SN900HL2
(Cut-off frequency is most low in the table below)
Video signal generator
CLOCK
DATA
Specification
satisfied
Wound Type
Film Type
DLW21SN900HQ2 DLP11SA900HL2
Film Type Array
DLP2ADN900HL4
common mode choke coil ESD protection device 0.05pF
Cut-off Frequency
Over 10GHz
Judge
Specification satisfied
Transition Time
Rise time: 83.4ps
Fall time: 77.4ps
Around 6GHz
Specification satisfied
Rise time: 90.4ps
Fall time: 85.5ps
Around 4GHz
Specification satisfied
Rise time: 100ps
Fall time: 97.4ps
Each of common mode choke coil can keep waveform, satisfy the specification.
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
C31E.pdf
• 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.
Mar.28,2011
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