Gigabit Ethernet PMD OptoLink Inc Presentation 6 Bryan

Gigabit Ethernet PMD Opto-Link Inc. – Presentation 6 Bryan Justice March 10, 2005

Gigabit Ethernet: Progress Summary Completed Tasks l l l Converted schematic into board layout using Express. PCB software. Board layout review Complete ordering of passives Next Week’s Tasks l l l 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

Gantt Chart

Transmitter Schematic

Receiver Schematic

Board Layout l l 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.

Keys to design l l 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.

Design Elements (Continued) l l The use of 06 x 03 passive components allowed for shorter lines, which is critical for avoiding large transmission lines with the high-frequency signal. We determined that the 06 x 03 sized parts would not be significantly more difficult to solder than the 08 x 05 parts.

Estimated Budget Digi-Key BC 1252 CT-ND $ 0. 02900 100 $ 2. 90 Digi-Key RHM 20. 0 HCT-ND $ 0. 07600 10 $ 0. 76 Digi-Key RHM 100 HCT-ND $ 0. 07600 10 $ 0. 76 Digi-Key RHM 115 HCT-ND $ 0. 07600 10 $ 0. 76 Digi-Key 3296 W-102 -ND $ 2. 50000 5 $ 12. 50 Digi-Key 3296 W-253 -ND $ 2. 50000 5 $ 12. 50 Digi-Key 490 -1034 -1 -ND $ 0. 12000 10 $ 59. 00000 2 $ 118. 00 Express PCB $ 1. 20 Advanced Optical Components HFE 419 x-541 $ 14. 50000 4 $ 58. 00 Advanced Optical Components HFD 3180 -103 $ 10. 00000 4 $ 40. 00 Digi-Key CP-002 APJ-ND $ 0. 73000 6 $ Jameco 188525 $ 4. 20000 10 Total: 4. 38 $ 42. 00 $ 293. 76

Ordering final components l l l The 06 x 03 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.

Next Week l l l l 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

References l l l ECE 164 Group 2 Presentations. (April 17, 2004). ECE 164 Group 2 Website. Retrieved February 24, 2005 from http: //www. ee. duke. edu/~mbrooke/EE 164. 02/Spring_2004/group_2/presentations. html http: //www. expresspcb. com Various vendor and manufacturer websites