[SI-LIST] AC coupling matching
- From: "N. Paul Taddonio" <ptaddoni@xxxxxxxxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Fri, 01 Feb 2002 10:10:52 -0500
Dear SI-List
Can anybody comment on the effect of AC-coupling capacitors used
on a pair of matched length (200 MHZ HSTL) clocks? I have duplicated
the capacitor placement (near the driver), ie the trace lengths are all
matched, but the capacitors themselves are not matched parts.
Any guesses as to how much skew could be induced?
The capacitors are 470 pF 10% X7R 0603 type. The value was chosen
for minimal impedance around 200 and 400 MHz.
-Paul
--------------------------------------------
N. Paul Taddonio
Nortel Networks, Optical Ethernet Switching
600 Tech Park, Billerica, MA 01821, (mailstop E65-60-203)
phone: 978-288-4611 fax: 978-288-0620
email: ptaddoni@xxxxxxxxxxxxxxxxxx
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