Routing tips?

[s3c]

The EMC course I did had a short section about routing considerations, one thing that wasn't mentioned was the difference curved versus 45 deg lines make, can anyone provide some insight as well as any other random suggestions?

[EEVblog]

The EMC course I did had a short section about routing considerations, one thing that wasn't mentioned was the difference curved versus 45 deg lines make

That's because it's essentially a myth, in all but the most extreme circumstances.

One key is to keep your loop areas as small as possible.

Dave.

[jahonen]

I would add that the loop area must be considered in 3D-fashion, including component leads and connectors/sockets (Mr. Maxwell sees it in this way in the final product! ). This is often forgotten since layouts are usually examined as 2D drawings and Z-axis is not visible.

Another one is that use source terminated transmission lines (series resistor at source end, contiguous ground plane below the trace, and trace width at least in same order than dielectric thickness, gives you ~75 ohms traces, double trace width gives 50 ohm traces) instead of just random p2p-traces. This won't hurt in EMC sense (even if you wouldn't actually need it), but might cost you more layers to your PCB (step from 2 to 4 is usually the most painful!).

Regards,
Janne

[RayJones]

This reminds me of an addon, WAYYYYY BACk, you could get for Protel.

Smartarcs.

Yes, the name could get you in trouble.