公开(公告)号：US10164912B2

公开(公告)日：2018-12-25

申请号：US15218681

申请日：2016-07-25

Applicant: Intel Corporation

Inventor： Adee O. Ran ,  David L. Chalupsky ,  Kevan A. Lillie ,  Richard I. Mellitz ,  Kent C. Lusted

IPC: H04L12/935

Abstract: Methods and apparatus for Ethernet auto-negotiation (AN) with parallel detect for 10G DAC or other non-auto-negotiated modes. AN base pages are transmitted from an Ethernet apparatus to advertise the ability to support at least one Institute of Electrical and Electronics Engineers (IEEE) 802.3 Ethernet specification supporting AN. A receiver and associated processing circuitry is configured to perform two detection modes in parallel, including a first detection mode that looks for a valid signal transmitted from an Ethernet link peer that does not support AN and a second detection mode looking for AN pages from an IEEE 802.3 Ethernet link peer that supports AN. If the link peer does not support AN, an Ethernet link is set up to use signaling in accordance with the Ethernet specification that does not support AN. If the link peer supports AN, an Ethernet link is set up using a corresponding IEEE 802.3 Ethernet link supporting AN. Supported non-AN Ethernet links include 10G DAC links.

公开(公告)号：US09846189B2

公开(公告)日：2017-12-19

申请号：US14160607

申请日：2014-01-22

Applicant: INTEL CORPORATION

Inventor： Richard I. Mellitz

IPC: G01R31/28 ,  G01R15/00 ,  G01R27/32

CPC classification number: G01R27/32

Abstract: Examples are disclosed for characterizing a transmission line. Sets of scatter parameters (s-parameters) associated with measured or modeled insertion loss (IL) or return loss (RL) values over a range of frequencies may be acquired for a transmission line. One or more parameter values for use in IL or RL fit functions may be adjusted to reach a threshold for a coefficient of determination (R2) value of a curve generated using the IL or RL fit functions to approximate the set of s-parameters over the range of frequencies. The IL or RL fit functions may then be used to generate other sets of s-parameters associated with IL or RL values for a recreated model of the transmission line. The other sets of s-parameters may be scaled to characterize transmission lines of various lengths. Other examples are described and claimed.