Re: [802.3_B10GAUTO] AC coupling capacitors information

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To: STDS-802-3-B10GAUTO@xxxxxxxxxxxxxxxxx

Subject: Re: [802.3_B10GAUTO] AC coupling capacitors information

From: "Christopher T. Diminico" <00000025925d7602-dmarc-request@xxxxxxxxxxxxxxxxx>

Date: Tue, 18 Jan 2022 05:14:46 +0000

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Reply-to: "Christopher T. Diminico" <cdimi80749@xxxxxxx>

Haysam et al,

The link segment is not AC-coupled. We can explicitly preclude AC-coupling in the link segment by adding a sentence for those concerned of

the possibility.

165.7 Link segment characteristics -

Add sentence end of paragraph

AC-coupling shall not be implemented within

the link segment (between TP1 and TP4).

The link segment IL limit should not be changed from 10MHz to 2MHz on the basis of baseline wander attributed to HPF corner frequency in https://www.ieee802.org/3/cy/public/nov21/feyh_3cy_01b_01_11_09_21.pdf.

Regards, Chris

-----Original Message-----
From: Haysam Kadry <hkadry@xxxxxxxx>
To: STDS-802-3-B10GAUTO@xxxxxxxxxxxxxxxxx
Sent: Tue, Jan 11, 2022 9:50 pm
Subject: [802.3_B10GAUTO] AC coupling capacitors information

Hello,

The discussion in moving the IL limit from 10MHz to 2MHz in accordance to https://www.ieee802.org/3/cy/public/nov21/feyh_3cy_01b_01_11_09_21.pdf. I am looking for some information

1. AC couple capacitor value range and ESR characteristics.

2. PHY termination circuit values

This will help put together a simulation profile for the front end circuit.

Best regards,

Haysam M. Kadry

Ford Motor Company

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