Re: XAUI AC coupling
Rich:
not to be picky, necessarily, but i believe you meant "moot".
else, i'd agree -- this should be written in signal integrity terms, not so
much in hardware specifics, and the end-user left to choose the kind of
coupling and demonstrate compliance.
--
J M Wincn
Cupertino, CA
At 01:36 PM 02-10-00 -0700, you wrote:
>Ali,
>
>That would be a mute point is AC-coupling operation is required and
>DC-coupling is allowed in a note which essentially has no teeth,
>compliance requirements, etc.
>
>Best Regards,
>Rich
>
>--
>
>Ali Ghiasi wrote:
>>
>> Rich Taborek wrote:
>> >
>> > Ladies and Gentlemen,
>> >
>> HI Rich
>>
>> You also need to ask the people who still want Dc-coupling, how many
>> would agree to a common mode
>> voltage. Earlier when I proposed a common mode voltage and a method of
>> AC and DC coupling everyone
>> wanted their own common mode voltage. Without agreeing t to a common
>> mode we have no standard and no point to discuss it under 802.3.
>>
>> Thanks,
>>
>> Ali Ghiasi
>> Newport Comunication
>>
>> > A recap of which way folks are leaning on this issue:
>> >
>> > Allow AC or DC-coupling
>> >
>> > Ed Grivna - Cypress
>> > Dawson Kesling - Intel
>> > Jeff Porter - Motorola
>> > Rich Taborek - nSerial
>> > Simon Sabato - Intel
>> > Tom Palkert - AMCC
>> > Sharam Hakimi - Lucent
>> > Fred Weniger - Vitesse
>> >
>> > Mandatory AC-coupling
>> >
>> > Vipul Bhatt - Finisar
>> > Larry Miller - Nortel
>> > Joel Dedrick - PMC-Sierra
>> > Richard Dugan - Agilent
>> > Justin Chang - Quake
>> > Ali Ghiasi - Newport Communications
>> > Chris Simoneaux - Picolight
>> > Pat Thaler - Agilent
>> > Geoff Thompson - Nortel
>> > Howard Frazier - Cisco
>> >
>> > Clearly there's no clear direction. However, as a compromise, I'm not
>> > averse to going in the following direction: Specify and mandate
>> > AC-coupled operation for XAUI. An note accompanying the coupling text
>> > should allow DC-coupled operation in XAUI links which meet all other
>> > XAUI specifications. Furthermore the overview and application subclauses
>> > must be modified to show cause for AC-coupling is required. The current
>> > test strongly suggests that DC-coupling is more appropriate (i.e.
>> > chip-to-chip interconnect). What say?
>
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