date:20161014

Re: [PSES] RE from Flat Panel ICs

2016-10-14 Thread alfred1520list

Hi Eugene,

Jokes aside, may be the meaning of general recommendations have different 
meanings to us so let's clarify that and see if it takes us any closer to 
finding help for you.

By focusing on chips specific causes to the RE problem implies that you have 
ruled out all other causes of the RE problems. One way to draw such conclusion 
is having a number of different designs differing only in the LVDS drivers chip 
being used. All other aspects such as circuit design, PCB layouts, peripheral 
connections, enclosures, environments, etc. are all significantly the same or 
identical. Thus the only variable is the LVDS drivers. Only then could we be 
blaming the chip and looking for chip specific causes. Otherwise you may risk 
chasing the wrong tail. 

It's worth stating my favorite statement about debugging: if one made the wrong 
assumption, one may never find the problem, so when you are facing a dead end, 
re-examine your assumptions. The most famous example is the software bug that 
causes the computer not to boot is an unplugged power cord:)

I apologize if I am merely repeating everything you already know very well. 
Again, wrong assumption leads to dead end and that helps nobody.

Best of luck debugging.

Sincerely
Alfred


On October 14, 2016 3:17:26 PM PDT, John Woodgate  
wrote:
>The ICs themselves are too small to produce significant RE. The RE
>comes from the PCB tracks and external cables. But of course you know
>that.
> 
>With best wishes DESIGN IT IN! OOO – Own Opinions Only
> www.jmwa.demon.co.uk J M Woodgate and
>Associates Rayleigh England
> 
>Sylvae in aeternum manent.
> 
>From: MARINA PEYZNER [mailto:epeyz...@sbcglobal.net] 
>Sent: Friday, October 14, 2016 10:25 PM
>To: EMC-PSTC@LISTSERV.IEEE.ORG
>Subject: Re: [PSES] RE from Flat Panel ICs
> 
> 
>Actually, my question was about Flat panel driver ICs, particularly
>about chips Intersil Techwell TW8804 and National Semiconductor
>DS90C385A. I had hope that somebody has valuable experience with this
>problem.
> 
>Thank you anyway,
>Eugene 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
>On Friday, October 14, 2016 2:12 PM, alfred1520list
> > wrote:
> 
>And general recommendations also say to reduce common mode current. But
>obviously this shouldn't have been said too:)
>On October 14, 2016 9:24:36 AM PDT, John Woodgate
> > wrote:
>It seems to me that claiming familiarity with general recommendations
>severely restricts what anyone can add. The general recommendation for
>reducing RE is to minimise the areas of current loops by pairing 'go'
>and 'return' conductors on adjacent layers of the PC board. But you
>obviously know that already.
> 
>With best wishes DESIGN IT IN! OOO – Own Opinions Only
> www.jmwa.demon.co.uk J M Woodgate and
>Associates Rayleigh England
> 
>Sylvae in aeternum manent.
> 
>From: MARINA PEYZNER [mailto:epeyz...@sbcglobal.net] 
>Sent: Friday, October 14, 2016 5:08 PM
>To: EMC-PSTC@LISTSERV.IEEE.ORG  
>Subject: [PSES] RE from Flat Panel ICs
> 
>  
>Dear experts,
>Flat panel driver ICs are known for their high emission. I have some
>problems with radiated emissions particularly from chips Intersil
>Techwell TW8804 and National Semiconductor DS90C385A.
>Could you, please share your knowledge about reducing this RE. We are
>familiar with general recommendations.
> 
>Thank you,
>Eugene 
>-
>
>This message is from the IEEE Product Safety Engineering Society emc-p!
>stc discussion list. To post a message to the list, send your e-mail to
> >
>All emc-pstc postings are archived and searchable on the web at:
>http://www.ieee-pses.org/emc-pstc.html
>Attachments are not permitted but the IEEE PSES Online Communities site
>at http://product-compliance.oc.ieee.org/ can be used for graphics (in
>well-used formats), large files, etc.
>Website: http://www.ieee-pses.org/
>Instructions: http://www.ieee-pses.org/list.html (in! cluding how to
>unsubscribe)  
>List rules: http://www.ieee-pses.org/listrules.html 
>For help, send mail to the list administrators:
>Scott Douglas  >
>Mike Cantwell  > 
>For policy questions, send mail to:
>Jim Bacher  >
>David Heald  > 
>-
>
>This message is from the IEEE Product Safety Engineering Society
>emc-pstc discussion list. To post a message to the list, send your
>e-mail to  >
>All emc-pstc postings are archived and searchable on the web at:

Re: [PSES] RE from Flat Panel ICs

2016-10-14 Thread Bfr

Did you look at the layout guideline app note, an1085?

 As LVDS drivers, designed for mobile phones, they should be 'quiet'', by 
design, but, without some idea of your application, and where you're having 
problems, it's difficult for anyone to help out. One suggestion, beyond AE 
assistance, is to find a mobile phone that uses this part, check schematic of 
the phone for any added resistors or rf filter arrays, maybe do a visual 
examination of such a phone

Barry


On 14 October 2016 23:25:23 CEST, MARINA PEYZNER  wrote:
>
>Actually, my question was about Flat panel driver ICs, particularly
>about chips Intersil Techwell TW8804 and National Semiconductor
>DS90C385A. I had hope that somebody has valuable experience with this
>problem. Thank you anyway,Eugene 
>
>
>
>
>
>
>
>
>
> 
>
>On Friday, October 14, 2016 2:12 PM, alfred1520list
> wrote:
> 
>
>#yiv8469829222 #yiv8469829222 -- _filtered #yiv8469829222
>{font-family:Helvetica;panose-1:2 11 6 4 2 2 2 2 2 4;} _filtered
>#yiv8469829222 {panose-1:2 4 5 3 5 4 6 3 2 4;} _filtered #yiv8469829222
>{font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;}#yiv8469829222
>#yiv8469829222 p.yiv8469829222MsoNormal, #yiv8469829222
>li.yiv8469829222MsoNormal, #yiv8469829222 div.yiv8469829222MsoNormal
>{margin:0cm;margin-bottom:.0001pt;font-size:12.0pt;}#yiv8469829222
>a:link, #yiv8469829222 span.yiv8469829222MsoHyperlink
>{color:blue;text-decoration:underline;}#yiv8469829222 a:visited,
>#yiv8469829222 span.yiv8469829222MsoHyperlinkFollowed
>{color:purple;text-decoration:underline;}#yiv8469829222 p
>{margin-right:0cm;margin-left:0cm;font-size:12.0pt;}#yiv8469829222
>span.yiv8469829222EmailStyle18
>{color:windowtext;font-weight:normal;font-style:normal;}#yiv8469829222
>span.yiv8469829222SpellE {}#yiv8469829222 .yiv8469829222MsoChpDefault
>{font-size:10.0pt;} _filtered #yiv8469829222 {margin:72.0pt 72.0pt
>72.0pt 72.0pt;}#yiv8469829222 div.yiv8469829222WordSection1
>{}#yiv8469829222 And general recommendations also say to reduce common
>mode current. But obviously this shouldn't have been said too:)
>
>On October 14, 2016 9:24:36 AM PDT, John Woodgate
> wrote:
>It seems to me that claiming familiarity with general recommendations
>severely restricts what anyone can add. The general recommendation for
>reducing RE is to minimise the areas of current loops by pairing 'go'
>and 'return' conductors on adjacent layers of the PC board. But you
>obviously know that already. With best wishes DESIGN IT IN! OOO – Own
>Opinions Onlywww.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh
>England Sylvae in aeternum manent. From: MARINA PEYZNER
>[mailto:epeyz...@sbcglobal.net] 
>Sent: Friday, October 14, 2016 5:08 PM
>To: EMC-PSTC@LISTSERV.IEEE.ORG
>Subject: [PSES] RE from Flat PanelICs   Dear experts,Flat panel driver
>ICs are known for their high emission. I have some problems with
>radiated emissions particularly from chips Intersil Techwell TW8804 and
>National Semiconductor DS90C385A.Could you, please share your knowledge
>about reducing this RE. We are familiar with
>generalrecommendations. Thank you,Eugene -
>This
>message is from the IEEE Product Safety Engineering Society emc-p!
>stcdiscussion list. To post a message to the list, send your e-mail to
>All emc-pstc postings are archived and searchable on
>the web at: http://www.ieee-pses.org/emc-pstc.htmlAttachments are not
>permitted but the IEEE PSES Online Communities site at
>http://product-compliance.oc.ieee.org/ can be used for graphics (in
>well-used formats), large files, etc.Website: http://www.ieee-pses.org/
>Instructions: http://www.ieee-pses.org/list.html (in! cludinghow to
>unsubscribe)
>List rules: http://www.ieee-pses.org/listrules.html For help, send mail
>to the list administrators:
>Scott Douglas 
>Mike Cantwell  For policy questions, send mail to:
>Jim Bacher 
>David Heald  -
>
>This message is from the IEEE Product Safety Engineering Society
>emc-pstc discussion list. To post a message to the list, send your
>e-mail to All emc-pstc postings are archived and
>searchable on the web
>at:http://www.ieee-pses.org/emc-pstc.htmlAttachments are not permitted
>but the IEEE PSES Online Communities site at
>http://product-compliance.oc.ieee.org/ can be used for graphics (in
>well-used formats), large files, etc.Website: http://www.ieee-pses.org/
>Instructions: http://www.ieee-pses.org/list.html (including how to
>unsubscribe)
>List rules: http://www.ieee-pses.org/listrules.htmlFor help, send mail
>to the list administrators:
>Scott Douglas 
>Mike Cantwell For policy questions, send mail to:
>Jim Bacher 
>David Heald 
>
>-- 
>Sent

Re: [PSES] RE from Flat Panel ICs

2016-10-14 Thread Brian O'Connell

Dunno, try the TI or Intersil app engineers for support. ICs such is these are 
application-dependent per the end-use equipment.

Brian

From: MARINA PEYZNER [mailto:epeyz...@sbcglobal.net] 
Sent: Friday, October 14, 2016 2:25 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] RE from Flat Panel ICs

Actually, my question was about Flat panel driver ICs, particularly about chips 
Intersil Techwell TW8804 and National Semiconductor DS90C385A. I had hope that 
somebody has valuable experience with this problem.

Thank you anyway,
Eugene 

On Friday, October 14, 2016 2:12 PM, alfred1520list  
wrote:

And general recommendations also say to reduce common mode current. But 
obviously this shouldn't have been said too:)
On October 14, 2016 9:24:36 AM PDT, John Woodgate  
wrote:
It seems to me that claiming familiarity with general recommendations severely 
restricts what anyone can add. The general recommendation for reducing RE is to 
minimise the areas of current loops by pairing 'go' and 'return' conductors on 
adjacent layers of the PC board. But you obviously know that already.

With best wishes DESIGN IT IN! OOO – Own Opinions Only
www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh England

Sylvae in aeternum manent.

From: MARINA PEYZNER [mailto:epeyz...@sbcglobal.net] 
Sent: Friday, October 14, 2016 5:08 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] RE from Flat Panel ICs

Dear experts,
Flat panel driver ICs are known for their high emission. I have some problems 
with radiated emissions particularly from chips Intersil Techwell TW8804 and 
National Semiconductor DS90C385A.
Could you, please share your knowledge about reducing this RE. We are familiar 
with general recommendations.

Thank you,
Eugene 
-

This message is from the IEEE Product Safety Engineering Society emc-p! stc 
discussion list. To post a message to the list, send your e-mail to 

All emc-pstc postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.
Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (in! cluding how to 
unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html 
For help, send mail to the list administrators:
Scott Douglas 
Mike Cantwell  
For policy questions, send mail to:
Jim Bacher 
David Heald  
-

This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 

All emc-pstc postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.
Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html 
For help, send mail to the list administrators:
Scott Douglas 
Mike Cantwell  
For policy questions, send mail to:
Jim Bacher 
David Heald  

-- 
Sent from my Android phone with K-9 Mail. Please excuse my brevity.
-

This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 

All emc-pstc postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.
Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html 
For help, send mail to the list administrators:
Scott Douglas 
Mike Cantwell  
For policy questions, send mail to:
Jim Bacher 
David Heald  

-

This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 

All emc-pstc postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES

Re: [PSES] RE from Flat Panel ICs

2016-10-14 Thread John Woodgate

The ICs themselves are too small to produce significant RE. The RE comes from 
the PCB tracks and external cables. But of course you know that.

With best wishes DESIGN IT IN! OOO – Own Opinions Only
  www.jmwa.demon.co.uk J M Woodgate and 
Associates Rayleigh England

Sylvae in aeternum manent.

From: MARINA PEYZNER [mailto:epeyz...@sbcglobal.net] 
Sent: Friday, October 14, 2016 10:25 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] RE from Flat Panel ICs

Actually, my question was about Flat panel driver ICs, particularly about chips 
Intersil Techwell TW8804 and National Semiconductor DS90C385A. I had hope that 
somebody has valuable experience with this problem.

Thank you anyway,
Eugene 

On Friday, October 14, 2016 2:12 PM, alfred1520list  > wrote:

And general recommendations also say to reduce common mode current. But 
obviously this shouldn't have been said too:)
On October 14, 2016 9:24:36 AM PDT, John Woodgate  > wrote:
It seems to me that claiming familiarity with general recommendations severely 
restricts what anyone can add. The general recommendation for reducing RE is to 
minimise the areas of current loops by pairing 'go' and 'return' conductors on 
adjacent layers of the PC board. But you obviously know that already.

With best wishes DESIGN IT IN! OOO – Own Opinions Only
  www.jmwa.demon.co.uk J M Woodgate and 
Associates Rayleigh England

Sylvae in aeternum manent.

From: MARINA PEYZNER [mailto:epeyz...@sbcglobal.net] 
Sent: Friday, October 14, 2016 5:08 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG  
Subject: [PSES] RE from Flat Panel ICs

Dear experts,
Flat panel driver ICs are known for their high emission. I have some problems 
with radiated emissions particularly from chips Intersil Techwell TW8804 and 
National Semiconductor DS90C385A.
Could you, please share your knowledge about reducing this RE. We are familiar 
with general recommendations.

Thank you,
Eugene 
-

This message is from the IEEE Product Safety Engineering Society emc-p! stc 
discussion list. To post a message to the list, send your e-mail to 
 >
All emc-pstc postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.
Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (in! cluding how to 
unsubscribe)  
List rules: http://www.ieee-pses.org/listrules.html 
For help, send mail to the list administrators:
Scott Douglas  >
Mike Cantwell  > 
For policy questions, send mail to:
Jim Bacher  >
David Heald  > 
-

This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 
 >
All emc-pstc postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.
Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) 

List rules: http://www.ieee-pses.org/listrules.html 
For help, send mail to the list administrators:
Scott Douglas  >
Mike Cantwell  > 
For policy questions, send mail to:
Jim Bacher  >
David Heald  > 

-- 
Sent from my Android phone with K-9 Mail. Please excuse my brevity.
-

This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 
 >
All emc-pstc postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.
Website: http://www.ieee-pses.org/

Re: [PSES] RE from Flat Panel ICs

2016-10-14 Thread MARINA PEYZNER


Actually, my question was about Flat panel driver ICs, particularly about chips 
Intersil Techwell TW8804 and National Semiconductor DS90C385A. I had hope that 
somebody has valuable experience with this problem. Thank you anyway,Eugene 









 

On Friday, October 14, 2016 2:12 PM, alfred1520list 
 wrote:
 

 #yiv8469829222 #yiv8469829222 -- _filtered #yiv8469829222 
{font-family:Helvetica;panose-1:2 11 6 4 2 2 2 2 2 4;} _filtered #yiv8469829222 
{panose-1:2 4 5 3 5 4 6 3 2 4;} _filtered #yiv8469829222 
{font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;}#yiv8469829222 
#yiv8469829222 p.yiv8469829222MsoNormal, #yiv8469829222 
li.yiv8469829222MsoNormal, #yiv8469829222 div.yiv8469829222MsoNormal 
{margin:0cm;margin-bottom:.0001pt;font-size:12.0pt;}#yiv8469829222 a:link, 
#yiv8469829222 span.yiv8469829222MsoHyperlink 
{color:blue;text-decoration:underline;}#yiv8469829222 a:visited, #yiv8469829222 
span.yiv8469829222MsoHyperlinkFollowed 
{color:purple;text-decoration:underline;}#yiv8469829222 p 
{margin-right:0cm;margin-left:0cm;font-size:12.0pt;}#yiv8469829222 
span.yiv8469829222EmailStyle18 
{color:windowtext;font-weight:normal;font-style:normal;}#yiv8469829222 
span.yiv8469829222SpellE {}#yiv8469829222 .yiv8469829222MsoChpDefault 
{font-size:10.0pt;} _filtered #yiv8469829222 {margin:72.0pt 72.0pt 72.0pt 
72.0pt;}#yiv8469829222 div.yiv8469829222WordSection1 {}#yiv8469829222 And 
general recommendations also say to reduce common mode current. But obviously 
this shouldn't have been said too:)

On October 14, 2016 9:24:36 AM PDT, John Woodgate  
wrote:
It seems to me that claiming familiarity with general recommendations severely 
restricts what anyone can add. The general recommendation for reducing RE is to 
minimise the areas of current loops by pairing 'go' and 'return' conductors on 
adjacent layers of the PC board. But you obviously know that already. With best 
wishes DESIGN IT IN! OOO – Own Opinions Onlywww.jmwa.demon.co.uk J M Woodgate 
and Associates Rayleigh England Sylvae in aeternum manent. From: MARINA PEYZNER 
[mailto:epeyz...@sbcglobal.net] 
Sent: Friday, October 14, 2016 5:08 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] RE from Flat PanelICs   Dear experts,Flat panel driver ICs are 
known for their high emission. I have some problems with radiated emissions 
particularly from chips Intersil Techwell TW8804 and National Semiconductor 
DS90C385A.Could you, please share your knowledge about reducing this RE. We are 
familiar with generalrecommendations. Thank you,Eugene -
This message is 
from the IEEE Product Safety Engineering Society emc-p! stcdiscussion list. To 
post a message to the list, send your e-mail to All emc-pstc 
postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.htmlAttachments are not permitted but the 
IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can 
be used for graphics (in well-used formats), large files, etc.Website: 
http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (in! cludinghow to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the 
list administrators:
Scott Douglas 
Mike Cantwell  For policy questions, send mail to:
Jim Bacher 
David Heald  -

This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 
All emc-pstc postings are archived and searchable on the web 
at:http://www.ieee-pses.org/emc-pstc.htmlAttachments are not permitted but the 
IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can 
be used for graphics (in well-used formats), large files, etc.Website: 
http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.htmlFor help, send mail to the 
list administrators:
Scott Douglas 
Mike Cantwell For policy questions, send mail to:
Jim Bacher 
David Heald 

-- 
Sent from my Android phone with K-9 Mail. Please excuse my brevity.-

This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 
All emc-pstc postings are archived and searchable on the web 
at:http://www.ieee-pses.org/emc-pstc.htmlAttachments are not permitted but the 
IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can 
be used for graphics (in well-used formats), large files, etc.Website:

Re: [PSES] RE from Flat Panel ICs

2016-10-14 Thread alfred1520list

And general recommendations also say to reduce common mode current. But 
obviously this shouldn't have been said too:)

On October 14, 2016 9:24:36 AM PDT, John Woodgate  
wrote:
>It seems to me that claiming familiarity with general recommendations
>severely restricts what anyone can add. The general recommendation for
>reducing RE is to minimise the areas of current loops by pairing 'go'
>and 'return' conductors on adjacent layers of the PC board. But you
>obviously know that already.
> 
>With best wishes DESIGN IT IN! OOO – Own Opinions Only
> www.jmwa.demon.co.uk J M Woodgate and
>Associates Rayleigh England
> 
>Sylvae in aeternum manent.
> 
>From: MARINA PEYZNER [mailto:epeyz...@sbcglobal.net] 
>Sent: Friday, October 14, 2016 5:08 PM
>To: EMC-PSTC@LISTSERV.IEEE.ORG
>Subject: [PSES] RE from Flat Panel ICs
> 
>  
>Dear experts,
>Flat panel driver ICs are known for their high emission. I have some
>problems with radiated emissions particularly from chips Intersil
>Techwell TW8804 and National Semiconductor DS90C385A.
>Could you, please share your knowledge about reducing this RE. We are
>familiar with general recommendations.
> 
>Thank you,
>Eugene 
>-
>
>This message is from the IEEE Product Safety Engineering Society
>emc-pstc discussion list. To post a message to the list, send your
>e-mail to  >
>All emc-pstc postings are archived and searchable on the web at:
>http://www.ieee-pses.org/emc-pstc.html
>Attachments are not permitted but the IEEE PSES Online Communities site
>at http://product-compliance.oc.ieee.org/ can be used for graphics (in
>well-used formats), large files, etc.
>Website: http://www.ieee-pses.org/
>Instructions: http://www.ieee-pses.org/list.html (including how to
>unsubscribe)  
>List rules: http://www.ieee-pses.org/listrules.html 
>For help, send mail to the list administrators:
>Scott Douglas  >
>Mike Cantwell  > 
>For policy questions, send mail to:
>Jim Bacher  >
>David Heald  > 
>
>-
>
>This message is from the IEEE Product Safety Engineering Society
>emc-pstc discussion list. To post a message to the list, send your
>e-mail to 
>
>All emc-pstc postings are archived and searchable on the web at:
>http://www.ieee-pses.org/emc-pstc.html
>
>Attachments are not permitted but the IEEE PSES Online Communities site
>at http://product-compliance.oc.ieee.org/ can be used for graphics (in
>well-used formats), large files, etc.
>
>Website:  http://www.ieee-pses.org/
>Instructions:  http://www.ieee-pses.org/list.html (including how to
>unsubscribe)
>List rules: http://www.ieee-pses.org/listrules.html
>
>For help, send mail to the list administrators:
>Scott Douglas 
>Mike Cantwell 
>
>For policy questions, send mail to:
>Jim Bacher:  
>David Heald: 

-- 
Sent from my Android phone with K-9 Mail. Please excuse my brevity.

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Re: [PSES] RE from Flat Panel ICs

2016-10-14 Thread John Woodgate

It seems to me that claiming familiarity with general recommendations severely 
restricts what anyone can add. The general recommendation for reducing RE is to 
minimise the areas of current loops by pairing 'go' and 'return' conductors on 
adjacent layers of the PC board. But you obviously know that already.
 
With best wishes DESIGN IT IN! OOO – Own Opinions Only
  www.jmwa.demon.co.uk J M Woodgate and 
Associates Rayleigh England
 
Sylvae in aeternum manent.
 
From: MARINA PEYZNER [mailto:epeyz...@sbcglobal.net] 
Sent: Friday, October 14, 2016 5:08 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] RE from Flat Panel ICs
 
  
Dear experts,
Flat panel driver ICs are known for their high emission. I have some problems 
with radiated emissions particularly from chips Intersil Techwell TW8804 and 
National Semiconductor DS90C385A.
Could you, please share your knowledge about reducing this RE. We are familiar 
with general recommendations.
 
Thank you,
Eugene 
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This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 
 >
All emc-pstc postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.
Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) 
 
List rules: http://www.ieee-pses.org/listrules.html 
For help, send mail to the list administrators:
Scott Douglas  >
Mike Cantwell  > 
For policy questions, send mail to:
Jim Bacher  >
David Heald  > 

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This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 


All emc-pstc postings are archived and searchable on the web at:
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Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.

Website:  http://www.ieee-pses.org/
Instructions:  http://www.ieee-pses.org/list.html (including how to unsubscribe)
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[PSES] RE from Flat Panel ICs

2016-10-14 Thread MARINA PEYZNER

  Dearexperts,Flatpanel driver ICs are known for their high emission. I have 
some problemswith radiated emissions particularly from chips Intersil Techwell 
TW8804 andNational Semiconductor DS90C385A.Could you, please share 
yourknowledge about reducing this RE. We are familiar with general 
recommendations. Thank you,Eugene 

-

This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 


All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html

Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.

Website:  http://www.ieee-pses.org/
Instructions:  http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:
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Re: [PSES] RE from Flat Panel ICs

Re: [PSES] RE from Flat Panel ICs

Re: [PSES] RE from Flat Panel ICs

Re: [PSES] RE from Flat Panel ICs

Re: [PSES] RE from Flat Panel ICs

Re: [PSES] RE from Flat Panel ICs

Re: [PSES] RE from Flat Panel ICs

[PSES] RE from Flat Panel ICs

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