Questions tagged [gigabit]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
2
votes
1answer
51 views

POE power pass through

Is it possible to connect the center taps of two Ethernet magnetics to each other back-to-back to pass the power from one port to another. Does it make sense? Is anything special required?
1
vote
1answer
51 views

Gearbox in 10GBASE-R Ethernet protocol

In 10GBASE-R specification, Gearbox is defined to take care the data width adaptation between PCS & PMA. For example, after the 64b66b encoding, the PCS data width will become 66bits. The gearbox ...
2
votes
1answer
126 views

10/100Mbps Magnetics with 10/100/1000 PHY

I have a SOC that has a KSZ9031RN PHY, that is a Gigabit PHY. But I'm going to use only in 10/100 Mode with 4 wires. Gigabit PHY datasheet recommends a magnetic for Gigabit Ethernet, that are ...
0
votes
1answer
147 views

Gigabit detection DIY

Ethernet up to 100Mbps uses only 2 of the 4 twisted wires in an ethernet cable while gigabit is using all of them. Connecting an LED to one of the gigabit-only pairs should therefore make it easy to ...
0
votes
1answer
78 views

Why this evaluation board use different track impedance than the right one? Ethernet PHY, routing

Im doing a design with a implementation of 1Gb ethernet switch, for that I bought a evaluation board to do it well. The problem is that in the layout of the ev board I can check that the track ...
3
votes
2answers
198 views

differential routing without GND

I have task that I need to make adapter board which transforms gigabit ethernet connector RJ45 to another connector (not RJ45). I also have power connector to carry power one side to other. I need ...
0
votes
2answers
249 views

LVDS Flex Cables - Optimizing Trace Layout for 10 GbE

I want to run a 10 Gigabit Ethernet (GbE) signal over a 15 pin LVDS flex cable like this one: My PCB will accept an RJ45 connector, and those traces will run over the PCB to the flex jumper, then ...
3
votes
1answer
1k views

Implementing 1000BASE-T (Twisted pair) over PCB backplane [duplicate]

Problem: We are designing a small payload which will contain several ethernet capable devices connected via a backplane we must design. All guidelines concern the scenario where the PHY is ...
1
vote
1answer
129 views

Gigabit Ethernet Coupler Design

I'm doing a PCB design which includes a Gigabit Ethernet 'coupler' - i.e coupling from one CAT 5e cable to another via my PCB (see sketch below) My question is, how careful do I need to be with ...
0
votes
1answer
637 views

Does SGMII contain MDIO?

When connecting a NIC (Intel I210-IS) to an gigabit ethernet switch with integrated PHYs (Marvell 88E6176) using the SGMII interface, I came across the following question: Since SGMII is a serialized ...
-1
votes
1answer
512 views

IP Camera IC (PAL to Ethernet)

I have a design problem to capture CCIR/PAL video from the camera that is available and send it over ethernet. Need to come up with my own printed circuit board design, having no prior experience in ...
0
votes
1answer
501 views

How much amps (maximum) are flowing through 1000Base-T Ethernet? [duplicate]

How much amps (maximum) would be flowing through a 5 meter Cat 5/6 Ethernet cable with 1000Base-T speed (IEEE 802.3ab, 5-PAM coding, so voltage levels vary between +- 2V, 1V, 0V)?
1
vote
1answer
3k views

Can I generate a 90° Clock signal with Xilinx's ODELAY for RGMII?

Some time ago I implemented a GMII interface for my Gigabit Ethernet core. Now I'm trying to do the same with the RGMII protocol. The reference implementation from Xilinx uses IDELAY[|E1|E2] ...