:: IPCI ::

Make all traces as short as possible to prevent ringing and reflections that may occur on electrically long traces.
For one-or-two-layer backplanes, route ground traces in parallel to each signal trace to minimize ground lops and crosstalk that may occur between traces that are electrically long.
do not use 900 angles when routing analog printed circuit boards.
When selecting a ferrite device for suppression of RF energy, take into consideration the following (8.2):

·      Select a ferrite material based upon the impedance presented to the circuit.

·      Determine the permeability value of the ferrite material for optimal frequency range of operation.

·      Alter the core size, shape, or length to change the impedance value of the ferrite device.

·      Elevated temperatures will decrease overrall impedance and performance.

·      Extreme bias (current flow through the material) decreases the impedance to the point of nonfunctionality.

·      Determine bhether ac or dc current is passed through the device. Excessive attenuation of a “wanted” signal could accur.

·      To increase the impedance of shield beads or cores, additional turns of wire may be added.