• 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.

C31E.pdf

Mar.28,2011

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Frequency (MHz)

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Frequency (MHz)

DLW21SN900HQ2

DLP11SA900HL2

Noise

Suppression

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

Without filter

Without filter

Test Example of HDMI1.3

Waveform Transmission

~Using ESD protection device 0.05pF~

CLOCK

DATA

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

Video signal generator

common mode choke coil

ESD protection device 0.05pF

ESD protection device only

Film Type DLP11SN900HL2

(Cut-off frequency is most low in the table below)

Cut-off Frequency

Judge

Wound Type

DLW21SN900HQ2

Film Type

DLP11SA900HL2

Film Type Array

DLP2ADN900HL4

Over 10GHz

Around 6GHz

Around 4GHz

Specification satisfied

Specification satisfied

Specification satisfied

Specification

satisfied

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

DLP/DLW Series