[SI-LIST] Re: DC-blocking transmission-line
- From: Scott McMorrow <scott@xxxxxxxxxxxxx>
- To: gkorony@xxxxxxxxx
- Date: Fri, 29 Jun 2007 10:32:41 -0400
george
The lowest frequency component is dependent upon the coding pattern
used, and the bit rate. There are a few publications on this:
http://pdfserv.maxim-ic.com/en/an/archive/1hfan901.pdf
http://pdfserv.maxim-ic.com/en/an/4hfan904.pdf
http://www.inphi-corp.com/products/presentations/Inphi_High-Speed_IC_Test_Webinar_062503.pdf
(slides 47, 48)
Scott McMorrow
Teraspeed Consulting Group LLC
121 North River Drive
Narragansett, RI 02882
(401) 284-1827 Business
(401) 284-1840 Fax
http://www.teraspeed.com
Teraspeed® is the registered service mark of
Teraspeed Consulting Group LLC
George Korony wrote:
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> BlankScott,
> The EM field propagates between the capacitors (or capacitor and GND?), but
> the capacitor's value is an interesting question. Of course to build a small
> and cheap device, lower the capacitor value better. But from the signal
> point of view the capacitor has to be big enough to transmit the lowest
> frequency-component of the signal in the given impedance environment. So the
> question is, what is the lowest frequency needed to reproduce accurately the
> signal at the receiver. I think this may be the same problem that was put on
> this forum before....how many adjacent zeros (or by the same means ones)
> does the signal contain?
> George
>
>
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> <DIV><SPAN class=3D970561812-29062007>Scott, </SPAN></DIV>
> <DIV><SPAN class=3D970561812-29062007>The EM field propagates between =
> the=20
> capacitors (or capacitor and GND?), but the capacitor's value is an =
> interesting=20
> question. Of course to build a small and cheap device, lower the =
> capacitor value=20
> better. But from the signal point of view the capacitor has to be big =
> enough to=20
> transmit the lowest frequency-component of the signal in the given =
> impedance=20
> environment. So the question is, what is the lowest frequency needed=20
> to reproduce accurately the signal at the receiver. I think this =
> may be the=20
> same problem that was put on this forum before....how many adjacent =
> zeros (or by=20
> the same means ones) does the signal contain?</SPAN></DIV>
> <P><SPAN class=3D970561812-29062007>George</SPAN></P>
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