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Matching Output Driver, Trace, & Receiver Impedances - How?

jpartis1 , 06-17-2018, 01:17 PM
I'm beginning to understand how to control the circuit board impedance to match the driver output, but what is puzzling me now is how do you match the impedance of the receiver?
If the driver output impedance is 50 ohms, and the trace width has been determined to give 50 ohms, how is it possible to match a receiver of let's say 60 ohms?


Driver = 50 ohms
Trace = 50 ohms
Recvr = 60 ohms

How is this handled?

Thank you!
mairomaster , 06-18-2018, 02:09 AM
That's not a big difference and unless the interface is very highspeed/noise sensitive, you shouldn't have problems. Some drivers/receivers allow you to chose differnt settings for the impedance (popular with DDR memory for example).
jpartis1 , 06-18-2018, 06:05 AM
Good to know, thanks mairomaster.
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