Joerg
Guest
Thu Jan 26, 2012 10:18 pm
Gents,
Does anyone remember a manufacturer that makes through-hole USB-B jacks
with common mode chokes in there? Preferably with a metal flap that can
also be grounded against a front panel.
Came upon a situation where they didn't place CM chokes on the board,
trying to see if it can be remedied sans relayout.
--
Regards, Joerg
http://www.analogconsultants.com/
Oppie
Guest
Thu Jan 26, 2012 11:20 pm
"Joerg" <invalid_at_invalid.invalid> wrote in message
news:9odua6FljkU1_at_mid.individual.net...
Quote:
Gents,
Does anyone remember a manufacturer that makes through-hole USB-B jacks
with common mode chokes in there? Preferably with a metal flap that can
also be grounded against a front panel.
Came upon a situation where they didn't place CM chokes on the board,
trying to see if it can be remedied sans relayout.
I had just been using a ferrite bead and passing the USB D- and D+ lines
both through it.
Joerg
Guest
Fri Jan 27, 2012 12:40 am
Oppie wrote:
Quote:
"Joerg" <invalid_at_invalid.invalid> wrote in message
news:9odua6FljkU1_at_mid.individual.net...
Gents,
Does anyone remember a manufacturer that makes through-hole USB-B jacks
with common mode chokes in there? Preferably with a metal flap that can
also be grounded against a front panel.
Came upon a situation where they didn't place CM chokes on the board,
trying to see if it can be remedied sans relayout.
I had just been using a ferrite bead and passing the USB D- and D+ lines
both through it.
Looks very tight in our case but that's an idea. Maybe we can find a
really flat bead.
--
Regards, Joerg
http://www.analogconsultants.com/
Robert Lacoste
Guest
Fri Jan 27, 2012 8:32 am
"Joerg" <invalid_at_invalid.invalid> a écrit dans le message de news:
9odua6FljkU1_at_mid.individual.net...
Quote:
Gents,
Does anyone remember a manufacturer that makes through-hole USB-B jacks
with common mode chokes in there? Preferably with a metal flap that can
also be grounded against a front panel.
Came upon a situation where they didn't place CM chokes on the board,
trying to see if it can be remedied sans relayout.
--
Regards, Joerg
http://www.analogconsultants.com/
Hi Joerg,
You can also use the same solution that the trick used in plenty of, well,
east-designed products : ship it with a USB cable with a built-in ferrite
bead on the device side. That way the "product" is the cable+device kit, and
your EMC certification will pass without problem. Of course your customer
may have issue if he use another USB cable, but that's no longer your
problem ;+)
Friendly yours,
Robert Lacoste
www.alciom;com
Joerg
Guest
Sat Feb 04, 2012 2:32 am
Robert Lacoste wrote:
Quote:
"Joerg" <invalid_at_invalid.invalid> a écrit dans le message de news:
9odua6FljkU1_at_mid.individual.net...
Gents,
Does anyone remember a manufacturer that makes through-hole USB-B jacks
with common mode chokes in there? Preferably with a metal flap that can
also be grounded against a front panel.
Came upon a situation where they didn't place CM chokes on the board,
trying to see if it can be remedied sans relayout.
--
Regards, Joerg
http://www.analogconsultants.com/
Hi Joerg,
You can also use the same solution that the trick used in plenty of, well,
east-designed products : ship it with a USB cable with a built-in ferrite
bead on the device side. That way the "product" is the cable+device kit, and
your EMC certification will pass without problem. Of course your customer
may have issue if he use another USB cable, but that's no longer your
problem ;+)
A big ferrite over the whole cable isn't helping, just a tiny ferrite
over only D+ and D- (together, or course) is what helps. Haven't found
any cable that has those. If anyone knows a source I am all ears.
--
Cordialement, Joerg
http://www.analogconsultants.com/
