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Sfp-experimenter » History » Revision 1

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laforge, 10/07/2018 06:51 AM


sfp-experimenter

This is the twin brother of the sfp-breakout board. It contains LVDS receiver/transmitter circuits, so you can use single-ended signals on the electrical side.

h2. Schematics / Design files

The schematics / design files are kept in git at https://git.osmocom.org/osmo-small-hardware/tree/sfp-breakout

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sfp-experimenter v1

R6 pull-down re-work

there was a need to place a bias resistor from RD_N to ground (pin4 on ic2) or the whole board would not work. ic2 has internal 100ohm prom pin3 to pin4 and pullups of ~300k to vcc. 100k pulldown on one leg pushes it into the proper operating range. due to the 100ohm its not neccessary to have more than one pulldown.

Files (7)
sfp-experimenter-r6-rework.jpg View sfp-experimenter-r6-rework.jpg 80.9 KB laforge, 10/07/2018 06:49 AM
sfp-experimenter.jpg View sfp-experimenter.jpg 189 KB laforge, 10/07/2018 06:49 AM
sfp-experimenter.pdf View sfp-experimenter.pdf 45.1 KB sfp-experimenter.pdf v1 schematic mschramm, 01/08/2019 03:48 PM
P3050287_1600.jpg View P3050287_1600.jpg 853 KB laforge, 03/14/2019 08:06 PM
P3050290_1600.jpg View P3050290_1600.jpg 877 KB laforge, 03/14/2019 08:06 PM
P3050292_1600.jpg View P3050292_1600.jpg 765 KB laforge, 03/14/2019 08:06 PM
P3050294_1600.jpg View P3050294_1600.jpg 587 KB laforge, 03/14/2019 08:06 PM

Updated by laforge over 5 years ago · 1 revisions

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