Presenter: Nassisa-Geda Techane

2 This Week’s Highlights The optical link budget almost finished Website up on the ECE domainWebsite Yahoo Group set up for easy correspondenceYahoo Group Background research on ExpressPCB, schematics of the transceiver underway Vendors contacted for parts availability and $ GANTT chart updated and things on time so far

3 The IEC Standard Source: The IEEE Std z, 2000 EditionThe IEEE Std z, 2000 Edition According to the IEC , the maximum output power of the VCSEL must not exceed 0 dBm *. * Datasheet of Honeywell’s HFE Datasheet of Honeywell’s HFE

4 The VCSEL … Also considering TrueLight’s TMC-5A41-112/-212 TrueLight’s TMC-5A41-112/-212 (1),(2) Datasheet for the Honeywell HFE VCSELDatasheet for the Honeywell HFE VCSEL Link Budget: I eff = P out /  I in = I eff + I th I mod = (2/3)(I in - I th ) I bias = I th + (1/2)I mod

5 The PD … Before that the loss due to the 62.5  m MMF is 7.5 dB *. Receiver Side: P in,PD = P out,VCSEL – P fiber I out,PD = I in,TIA = R* P in,PD According to the Max3266 (TIA) datasheet, the TIA behaves linear for the input currents shown. Also, the corresponding voltage inputs to the limiting amplifier (Max3264) meet the spec in the datasheet. * The IEEE 802.3Z Std., 2000 EditionThe IEEE 802.3Z Std., 2000 Edition

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7 Plans for the Coming 2 Weeks Finalize the optical link budget Order components Work on the schematic and layout design of the TxRx pair Wrap up polishing the website Take exam