ELMEC Differential Signal Balancer
ELMEC Corporation	
President, CEO&CTO, Masaaki Kameya	
ELMEC Technology of America	
Vice President, COO, Ion Cenuse	Agenda	
1. About Differential Signal Balancer (DSB)	
2. Application Example : Printed Circuit Board Transmission
3. Application Example : Insert DSB before Transmission Line	
4. Application Example : Insert DSB after Transmission Line	
5. Conclusion	
6. About us	

http://www.elmectech.com	
1	

ELMEC Corp.	
ELMEC proprietary1. About Differential Signal Balancer (DSB)	

Unbalanced Signal150100500-­‐5 0-­‐1 0 0-­‐1 5 0V 3 &V 4 	  [% ]V 3 &V 4 	  [% ]Non-Magnetic common-mode filter for 5 G to 28 Gbit/s
Application : Removing skew, tr/tf-difference, EMI solution
Unbalanced Signal, 10 Gbit/s, skew 10 ps, tr/tf= 15 ps/30 ps

6 .0

6 .5

150
100
500
-­‐5 0-­‐1 0 0-­‐1 5 0

ELMEC DSB used

6 .0

7 .0

6 .5

7 .0

T ime	  [ns]T ime	  [ns]

150
100
500
-­‐5 0-­‐1 0 0-­‐1 5 0

Unbalanced Signal
V 3 &V 4 	  [% ]V 3 &V 4 	  [% ]Unbalanced Signal, 28 Gbit/s, skew 8 ps, tr/tf= 10 ps/20 ps

6 .0

6 .1

6 .2

6 .3

6 .4

6 .5

150
100500-­‐5 0-­‐1 0 0-­‐1 5 0

ELMEC DSB used

6 .0

T ime	  [ns]

6 .1

6 .2

6 .3

6 .4

6 .5

T ime	  [ns]2	

ELMEC proprietary1. About Differential Signal Balancer (DSB)	
Load Map
CDLD Type2 mm x 1.25 mm
New Product0.8 mm x 0.6 mm
Two Metal Layers
New Product0.1 mm x 0.1 mm 	～ 0.2 mm x 0.2 mm
Four Metal Layers
Available Now
External Component
for Reference Board
Strong Noise AbsorbingExternal Component
Sample:1Q-2017
Built into Interposer
IP Core: ～ 3Q-2016

Built into Silicon Die
IP Core: ～ 3Q-2016
ELMEC Corp.	

3	

ELMEC proprietary2. Application Example : Printed Circuit Board Transmission
LSI 1 GND Plane 1	

GND Plane 2	

LSI 2 	GND Plane 3	

PCB (PPE)	

GND plane discontinuity (Inductive)	 GND discontinuity 	Equivalent Circuit withLSI 1

GND Plane 1	

LSI 2 	

Pad, ESD Diode	4	

GND Plane 2	
ELMEC proprietary2. Application Example : Printed Circuit Board Transmission
Unbalanced Signal, 10 Gbit/s, skew 10 ps, tr/tf= 15 ps/30 ps
NoiseSkew
V3	V4	PPE, 2 inch	

0 .0 2 0200 pH

Noise Spectrum
V 3 &V 4 	  [% ]A mplitude	  [V ]200 pH0 .0 1 50 .0 1 00 .0 0 50 .0 0 00510F requenc y	  [GHz]15150
100500-­‐5 0-­‐1 0 0-­‐1 5 0

Received Signal

6 .0

20

Strong SpikeDSB Inserted (Next Page)5	0.5 pF

6 .5

7 .0T ime	  [ns]

ELMEC Corp.	
ELMEC proprietary3. Application Example : Insert DSB before Transmission Line
CDLD30R Inserted
DSB

Noise? Skew?
V3	V4	0 .0 2 0

Noise Spectrum with DSB
V 3 &V 4 	  [% ]A mplitude	  [V ]PPE, 2 inch	0 .0 1 50 .0 1 00 .0 0 50 .0 0 0051015150
100500-­‐5 0-­‐1 0 0-­‐1 5 0

Received Signal with DSB

6 .0

20

6 .5

7 .0

T ime	  [ns]F requenc y	  [GHz]Completely Removed

Well Balanced
ELMEC Corp.	

6	

ELMEC proprietary3. Application Example : Insert DSB before Transmission LineDSBIP Core, 0.1 mm x 0.1 mm, Built into Die
Noise? Skew?
V3	V4	0 .0 2 0

Noise Spectrum with DSB
V 3 &V 4 	  [% ]A mplitude	  [V ]PPE, 2 inch	

0 .0 1 50 .0 1 00 .0 0 50 .0 0 0051015150
100500-­‐5 0-­‐1 0 0-­‐1 5 0

Received Signal with DSB

6 .0

20

6 .5

7 .0

T ime	  [ns]F requenc y	  [GHz]

Enough Removed

Almost Balanced
ELMEC Corp.	

7	

ELMEC proprietary4. Application Example : Insert DSB after Transmission Line
Effective to remove unbalance in PCB
CDLD30R Inserted
DSB

V3	V4	PPE, 2 inch	
200 pH200 pH

150
100500-­‐5 0-­‐1 0 0-­‐1 5 0Received Signal without DSB
V 3 &V 4 	  [% ]V 3 &V 4 	  [% ]0.5 pF

6 .0

6 .5

150
100500-­‐5 0-­‐1 0 0-­‐1 5 0

Received Signal with DSB

6 .0

7 .0

6 .5

7 .0

T ime	  [ns]T ime	  [ns]Balanced
ELMEC Corp.	
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ELMEC proprietary4. Application Example : Insert DSB after Transmission LineIP Core, 0.1 mm x 0.1 mm, Built into Die
DSB

V3	V4	

150
100500-­‐5 0-­‐1 0 0-­‐1 5 0

Received Signal without DSB
V 3 &V 4 	  [% ]V 3 &V 4 	  [% ]PPE, 2 inch	

6 .0

6 .5

7 .0

150
100500-­‐5 0-­‐1 0 0-­‐1 5 0

Received Signal with DSB

6 .0T ime	  [ns]6 .57 .0T ime	  [ns]Balanced
ELMEC Corp.	
9	ELMEC proprietary4. Application Example : Insert DSB after Transmission Line
Unbalanced Signal, 28Gbit/s, skew 8 ps, tr/tf= 10 ps/20 ps
IP Core, 0.1 mm x 0.1 mm, Built into Die
DSB

V3	V4	PPE, 2 inch	
50pH

150100500-­‐5 0-­‐1 0 0-­‐1 5 00.2 pF

Received Signal without DSBV 3 &V 4 	  [% ]V 3 &V 4 	  [% ]

50 pH

6 .0

6 .1

6 .2

6 .3

6 .4

6 .5

150
100
500
-­‐5 0-­‐1 0 0-­‐1 5 0

Received Signal with DSB

6 .0

T ime	  [ns]

6 .1

6 .2

6 .3

6 .4

6 .5

T ime	  [ns]Almost Balanced
ELMEC Corp.	
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ELMEC proprietary5. Conclusion(1) ELMEC Differential Signal Balancer (DSB) is very effective
to remove skew, tr/tf difference for ultra high speed signals
exceeding 10 G bit/s.
(2) ELMEC Differential Signal Balancer (DSB) is available up
to 28 Gbit/s ultra high speed transmission.
(3) ELMEC is preparing New DSB by IP Core which is verysmall size 0.1 mm x 0.1 mm, and is easily built into silicondies .

ELMEC Corp.	
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ELMEC proprietary6. About us【Established】 Feb. 1981	
【President】 Masaaki Kameya	
Business Career	CEO (@ ELMEC Corp. 2013-Now)	
Research of Noise Absorber (@ Matsue ELMEC Corp. 2009-2013)	
Research of LTCC Chip Delay Line (@ ELMEC Corp. 1998-2009)	
Development of Production Machine (@ Matsue ELMEC Corp. 1992-1998)	
Research of Traditional Delay Line (@ ELMEC Corp.1988-1992)	
Research of Semiconductor Laser (@ Mitsubishi Electric corp. 1985-1988)	

Education : Tokyo Institute of Technology (Master degree)	

【Office】
Head Office (Kawasaki Japan)	
ELMEC Corporation

USA	
Factory (Shimane Japan)	
Matsue ELMEC Corporation	 ELMEC Technology of America, Inc.		

ELMEC Corp.	
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ELMEC proprietary