Interesting question and of interest to many of us Ken. My thoughts:
- A choke between board ground and the shield isn't really
desirable. All it does is create a frequency dependent floating shield. It
becomes another high Q resonant element in the radiation system driven by
any co
Hi Ken,
This is a tough question to answer since the coupling mechanism is different
product by product in reality. As you mentioned it is typical to tie down USB
connector shell to the digital return plane, and I think that is the best
option. Of course the cable shield could act as antenna if
In message <4a100c15-770c-4021-aea8-f7f2a9169...@emc-seminars.com>,
dated Thu, 10 Sep 2015, Ken Wyatt writes:
Typically, the USB connector shield is soldered directly to the digital
return plane. Is isolating the connector ground from the digital return
plane and inserting a ferrite bead betw
Hi All,
It seems I'm always running into client products with USB 2.0 (or 3.0)
connectors mounted on circuit boards that are enclosed within unshielded cases.
I understand that CM chokes can be added to the data lines. However, given a
circuit board with common-mode noise running all around, th
In message ,
dated Thu, 10 Sep 2015, =?iso-8859-2?Q?Bo=B9tjan_Glavi=E8?=
writes:
Therefore I am a bit confused what should we consider for determination
of working voltage. Is it rated voltage (marked on the unit) or we need
to consider also tolerances or even short-term voltage?
Rated vol
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