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Altera_Forum
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15 years ago

Cyclone IV GX LVDS clock input resistor termination

Hi Altera experts, I am designing using the EP4CGX15BF14C8 (I have the transceiver dev board to try my design). Question I want a reference clock for the transceivers so I use a 125Mhz osc...
Altera_Forum's avatar
Altera_Forum
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15 years ago

I don't have access to c4gx_pcie_revb.pdf at this moment. My ftp doesn't work. So if you are willing to email it to me or post it, I can have a look.

If you are going to implement the AC-coupled version, you can alway replace the capacitors with 0 Ohm resistors. It will affect your line characteristics, though.

But be sure to use the 100 Ohm (or 2x 50 Ohm) termination. That's absolutely necessary.

Success, Ton