Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Driving terminated controlled impedance trace single ended

Hi, I'm sure this comes up a lot but I couldn't find an exact match to my query. Consider a single ended 3.3V LVTTL Cyclone IV output, driving into a 50 ohm trace with far end parallel termin...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

You can use series termination (20 to 50 ohms in series with the driver output) to gain some extra trace length. The resistor damps the reflected wave when it returns to the source.