icem-ce extraction methodology

EMC is our thing

Presented by Sébastien Serpaud

ICEM-CE extraction methodology

www.nexio-online.com

Presented by Sébastien SerpaudNEXIO

Co-author: Jean-Luc Levant (Atmel)Yannick Poiré (Nexio)Marc Meyer (EADS)Sereirath Tran (Airbus)

EMC is our thing

Introduction

Component Emission Model

Component with equipment manufacturer point of view :

- Component model is a black box- No many information about internal structure- ↑ frequency domain => ↑ complexity of model

www.nexio-online.com 218/11/2009

IC

EMC is our thing

Introduction

Parameters determination: several levels

Component Emission Model


StatisticsStandard technologies

Approximation

LibrariesTools

Measurement setup

Field of investigation

EMC is our thing

Plan of presentation

1. ICEM-CE extraction methodology

1. PDN extraction

2. IA extraction


2. Circuit resolution algorithm to IA extraction

1. Kirchhoff’s Current Laws (KCL):

2. KCL + partial mutual coupling

3. Kron method

EMC is our thing

1. ICEM Modeling

ICEM-CE Model

IEC 62433-3 : ICEM-CE


IAComponent

PDNComponent Ia

Ia Example

RVss LVss

RVdd LVdd

PDN Example

EMC is our thing

1.1 ICEM - PDN modeling

ICEM-CE Model



IAComponent

PDNComponent Ia

Ia Example

RVss LVss

RVdd LVdd

PDN Example

EMC is our thing


+=

21

21

1.2

S

SZZ cin

Methodology:

S-Parameter

measurements

Building PDN structure

model


Solving the linear

system

Validate of the PDN model

using a test case.

Z conversion +

RLC modeling

EMC is our thing


S-Parameter

measurements


modelRVdd3 LVdd3

Vdd3

RVdd4 LVdd4

Vdd4

RVdd2 LVdd2Vdd2

RVdd1 LVdd1Vdd1

IaCnet

RVddcLVddcVddc

Creg

Cbal

K1 Lvdd1 Lvss1K2 Lvdd2 Lvss2K3 Lvdd3 Lvss3K4 Lvdd4 Lvddc

Z conversion +


Solving the linear

system


using a test case.

RVss2 LVss2

Vss2

RVss1 LVss1Vss1

RVss3 LVss3

Vss3

IaCnet

Rsub

CregZ conversion +

RLC modeling

EMC is our thing


S21 method for Z(f) measurement: S-Parameter

measurements


model

Z conversion +


- S21 snr is smaller than S11 for low value- Only transmission calibration pattern required (vs SOLT for S11)

S21 vs S11:

Solving the linear

system


using a test case.

Z conversion +

RLC modeling

EMC is our thing


+= 21

1.2

S

SZZ cin

R=1.77L=6.4n

S-Parameter

measurements


model

Z conversion +


R/2 L/2

R/2 L/2

C

+ 211 S

Zin

L=6.4nC=500p

Solving the linear

system


using a test case.

Z conversion +

RLC modeling

EMC is our thing


R2 L2

R1 L1

R3 L3

C1

C2

1

2

3

11112 Rr

Example:

8 unknowns => 8 equations

1 measurement => 3 parameters

Only 3 measurements is required(=9 equations)

S-Parameter

measurements


model

Z conversion +


=

11

11

11

3

2

1

13

23

12

R

R

R

r

r

r

=

11

1

1

2

1

13

23

12

C

C

c

c

c

=

11

11

11

3

2

1

13

23

12

L

L

L

l

l

lpcplrZ .121.121212 ++=

pcplrZ .231.232323 ++=

pcplrZ .131.131313 ++=

1. −= TXY

3 measurements :

Resolution :

Solving the linear

system


using a test case.

Z conversion +

RLC modeling

TYX .=

EMC is our thing


RVdd3 LVdd3Vdd3

RVdd4 LVdd4

Vdd4

RVdd2 LVdd2Vdd2

RVdd1 LVdd1Vdd1

RVss1 LVss1

IaCnet

RVddcLVddcVddc

Rsub

Creg

Cbal

K1 Lvdd1 Lvss1K2 Lvdd2 Lvss2K3 Lvdd3 Lvss3K4 Lvdd4 Lvddc

S-Parameter

measurements


model

Z conversion +


RVss2 LVss2

Vss2

RVss1 LVss1Vss1

RVss3 LVss3

Vss3

Rsub

24 unknowns => 12 measurements required

+ 3-4 others measurements configurations for validation

Solving the linear

system

Validate of the PDN

model using a test case.

Z conversion +

RLC modeling

EMC is our thing

1.2 ICEM – IA modeling

ICEM-CE Model



IAComponent

PDNComponent Ia

Ia Example

RVss LVss

RVdd LVdd

PDN Example

EMC is our thing


Methodology:

Measure Vext(t)

Vext(f) = FFT(Vext(t))

Build models of

set-up elements



IA(t) = FFT-1(IA(f))

[ ] [ ](f).Z IA(f) 1

extI−=

(f)Z

(f)V (f)I

Rmes

extext =

EMC is our thing


Measure Vext(t)


Build models of

set-up elements




[ ] [ ](f).Z IA(f) 1

extI−=

(f)Z

(f)V (f)I

Rmes

extext =

MicrocontrolerZprobe

Zpower

iext

ZCdecCore

EMC is our thing


Measure Vext(t)


Build models of

set-up elementsNumeric Oscilloscope


Vext



[ ] [ ](f).Z IA(f) 1

extI−=

(f)Z

(f)V (f)I

Rmes

extext =

MicrocontrolerZprobe

Zpower

iext

ZCdecCore

EMC is our thing


FFTVext(t) Vext(f)

fmaxfmin

Vext-filter(t)Vext(t)Measure Vext(t)


Build models of

set-up elements




[ ] [ ](f).Z IA(f) 1

extI−=

(f)Z

(f)V (f)I

Rmes

extext =

Vext(f)

EMC is our thing


Measure Vext(t)


Build models of

set-up elements




[ ] [ ](f).Z IA(f) 1

extI−=

(f)Z

(f)V (f)I

Rmes

extext = (f)Z

(f)V (f)I

probe

extext =

EMC is our thing


Measure Vext(t)


Build models of

set-up elements




[ ] [ ](f).Z IA(f) 1

extI−=

(f)Z

(f)V (f)I

Rmes

extext =

[ ] [ ](f). IA(f)11

1 ext

m

m IZ−−

−=

decPDNpow

m

m ZZZZ +++= RmesZ

0. =mm

m JZ

EMC is our thing


Measure Vext(t)


Build models of

set-up elements

FFT-1




[ ] [ ](f).Z IA(f) 1

extI−=

(f)Z

(f)V (f)I

Rmes

extext =

FFT-1

EMC is our thing

Plan of presentation

1. ICEM-CE extraction methodology

1. PDN extraction

2. IA extraction


2. Circuit resolution algorithm to IA extraction

1. Kirchhoff’s Current Laws (KCL):

2. KCL + partial mutual coupling

3. Kron method

EMC is our thing

ICEM-CE

2 Circuit resolution algorithm

a) Kirchhoff’s Current Laws (KCL):

IA

Iext


ICEM-CE

Rsub

Zprobe ZVdd

IA

IextZVddc

Zpow

ZVssZdecCregCsup

Cbal

j2j1

j3

0. =mm

m JZ

3 meshs => m=3ICEM-CE

EMC is our thing



Algorithm validation

Iext

PDN-1

IA

IA extraction algorithm


Iextmeas

PDN

=

Iext’

IA

Algorithm is OK

Circuit simulation

Algorithm is NOK

yes

no

EMC is our thing



IA(t)

3.0A

0.0A


Iext_simu(t)Iext_meas(t)

-0.9A

180µA

0µA

-120µA

EMC is our thing


b) KCL + partial mutual coupling:

Working hypothesis: “ Vdd and Vss current have equal amplitude”

RVdd1 LVdd1

Vdd1

RVss1 LVss1Ck1


).(.

).(.

)*.

MxLvssxwiZLVssx

MxLvddxwiZLVddx

LVssxLVddxkxMx

−=−=

=RVss1 LVss1

Vss1

RVdd1 LVdd1-M1

Vdd1

RVss1 LVss1-M1

Vss1

C

EMC is our thing



ICEM-CE

IA

Iext


Rsub

Zprobe ZVdd

IA

IextZVddc

Zpow

ZVssZdecCregCsup

Cbal

j2j1

j3

0. =mm

m JZ

3 meshs => m=3ICEM-CE

ICEM-CE

EMC is our thing


IA(t)

6.4A

0.0A




-1.6A

180µA

0µA

-120µA

EMC is our thing



Working hypothesis: “ Vdd and Vss current have equal amplitude”

=>wrong hypothesis


Ivdd1(t)Ivss1(t)

3.0A

0.0A

-0.9A

Ratio = x6

EMC is our thing


c) Kron method:

ICEM-CE

a mesh

a branch


+

+

ZCdecZvddc

ZCreg

Rsub

ZCbal

ZC

Zvss

Zvss

Zvss

Zvdd

Zvdd

Zvdd

Zvdd

ZmesZa

sup

3

2

1

1

2

3

4

lim

−−

−−

−−

4

3

2

1

1

2

3

4

M

M

M

M

M

M

M

M

−−

−

−−

−−

−−

−

−

1

1

111

11

1

11

11

11

11

11

11

11

1

1

bm

bb

bb

bm

mm CoMzCoZ )..(

' += 0. =mm

m JZ

=b

bM =b

mCo=b

bZ

Connectivity matrix:Impedance matrix: Coupling matrix:

(b=13)(m=9)

EMC is our thing


IA(t)

2.4A

0.0A

c) Kron method :



-0.6A

180µA

0µA

-120µA

EMC is our thing


IA(t)

2.4A

Kron method(With mutual)

KCL method(Without mutual)

3.0A


IA(t)

0.0A

-0.6A

0.0A

-0.9A

Amplitude = 3.9A Amplitude = 3A

=> error = 23%

EMC is our thing

Conclusion

- ↑ frequency domain included ↑ complexity of model- Component model is black box- without many information about internal structure

=> Develop extraction model method


=> Develop extraction model method

Mutual inductance coupling can not be neglectedMethodology presented is very adapted to ICEM extractionIt can be used for complex model

EMC is our thing

Thanks for your attention


Thanks for your attention

EMC is our thing

end


end

EMC is our thing


S-Parameter

measurements


model

Rprobe<0.01Lprobe=1.37n

Phase planProbe

de-embedding


Solving the linear

system


using a test case.

Lprobe=1.37nZ conversion +

RLC modeling

icem-ce extraction methodology

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