[SI-LIST] Re: FW: DC-blocking transmission-line
- From: Scott McMorrow <scott@xxxxxxxxxxxxx>
- To: gkorony@xxxxxxxxx
- Date: Fri, 29 Jun 2007 00:45:21 -0400
george
By definition the impedance of a capacitor is 1/(j * omega * C). It is
not constant. The best you can do is to adjust C to place the
capacitance within the range you need, over the bandwidth you desire.
Scott
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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> It is interesting that a pure theoretical question put to the board design
> community prompts unexpected answers. Indeed we do have a patent on this,
> and if the patent was issued inadvertently, it is a problem that will be
> solved on a case-by case basis.
> My question is about the "loosely" and "strongly" coupled differential
> pairs, and if their nature will interact with the device under
> discussion...and how?
> Basically we have two capacitors in the same body with controlled coupling
> between them and we try to figure out what characteristic impedance fits
> better the needs, or what other things may matter.
> George
>
>
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> <DIV><SPAN class=3D928273317-28062007>It is interesting that a pure =
> theoretical=20
> question put to the board design community prompts unexpected answers. =
> Indeed we=20
> do have a patent on this, and if the patent was issued =
> inadvertently,=20
> it is a problem that will be solved on a case-by case =
> basis.</SPAN></DIV>
> <DIV><SPAN class=3D928273317-28062007>My question is about the "loosely" =
> and=20
> "strongly" coupled differential pairs, and if their nature will interact =
> with=20
> the device under discussion...and how?</SPAN></DIV>
> <DIV><SPAN class=3D928273317-28062007>Basically we have two capacitors =
> in the same=20
> body with controlled coupling between them and we try to figure out what =
>
> characteristic impedance fits better the needs, or what other things may =
>
> matter.</SPAN></DIV>
> <DIV><SPAN class=3D928273317-28062007>George</SPAN></DIV>
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