Gigabit%20Ethernet%20PMD

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Gigabit Ethernet PMD

• Opto-Link Inc. Presentation 6

Bryan Justice March 10, 2005
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Gigabit EthernetProgress Summary
Completed Tasks
Next Weeks Tasks

• Converted schematic into board layout using
  ExpressPCB software.
• Board layout review
• Complete ordering of passives

• First written report
• Follow-up on backordered parts
• Receive parts
• If all parts are received, we can build our first
  board and begin testing
• Website
• Spring break fun

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Gantt Chart
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Transmitter Schematic
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Receiver Schematic
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Board Layout

• Bottom left Common cathode layout
• Bottom right Common anode layout
• Top Aggressive layout
• We opted for a third layout on the board instead
  of implementing a reversible common anode/cathode
  layout. We can use this board with both the AOC
  and Emcore VCSELs.

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Keys to design

• Good design practice and saving space allowed us
  to fit three layouts onto one miniboard.
• We may use both our primary AOC VCSEL or our
  secondary Emcore VCSEL with the two bottom
  layouts.

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Design Elements (Continued)

• The use of 06x03 passive components allowed for
  shorter lines, which is critical for avoiding
  large transmission lines with the high-frequency
  signal.
• We determined that the 06x03 sized parts would
  not be significantly more difficult to solder
  than the 08x05 parts.

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Estimated Budget
Digi-Key BC1252CT-ND 0.02900 100 2.90
Digi-Key RHM20.0HCT-ND 0.07600 10 0.76
Digi-Key RHM100HCT-ND 0.07600 10 0.76
Digi-Key RHM115HCT-ND 0.07600 10 0.76
Digi-Key 3296W-102-ND 2.50000 5 12.50
Digi-Key 3296W-253-ND 2.50000 5 12.50
Digi-Key 490-1034-1-ND 0.12000 10 1.20
Express PCB 59.00000 2 118.00
Advanced Optical Components HFE419x-541 14.50000 4 58.00
Advanced Optical Components HFD3180-103 10.00000 4 40.00
Digi-Key CP-002APJ-ND 0.73000 6 4.38
Jameco 188525 4.20000 10 42.00
Total 293.76
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Ordering final components

• The 06x03 capacitors were backordered, but should
  be in and shipped in time for our return for
  break.
• The PCBs will be ordered before break and should
  also be in our possession after break.
• The intention is for all components to have
  arrived for our return from break.

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Next Week

• Order PCBs
• First written report
• Follow-up on backordered parts
• Receive parts
• If all parts are received, we may build our first
  board and begin testing
• Complete website
• Spring break fun

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References

• ECE164 Group 2 Presentations. (April 17, 2004).
  ECE164 Group 2 Website. Retrieved February 24,
  2005 from http//www.ee.duke.edu/mbrooke/EE164.02
  /Spring_2004/group_2/presentations.html
• http//www.expresspcb.com
• Various vendor and manufacturer websites

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