HEIGHT AND WIDTH LAYER LIST STACK SKIN
Properties of the surrounding materials - the energy in the signal is not contained within the copper of the trace, due to the skin effect, it also travels down the dielectric material that surrounds the trace.Distance from the trace to the reference plane(s) - the return path of the signal energy is as important as the signal's path, this return path follows the signal path in the adjacent reference plane(s).Cross-sectional area of the trace - determined from the width, the height (copper thickness), and the slope of the trace edges created during the etching process.The impedance of the trace routing is defined by the: The best way to manage the impact of these additional circuit elements is to design the trace routing so that the characteristic impedance is consistent over the length - a technique called controlled impedance routing. That trace has an impedance, which is referred to as the characteristic impedance (Zo). As the length of the signal switching edge becomes shorter than the length of the PCB trace that carries it, the trace has to be treated as part of the circuit. Applying the Impedance Profile to the RoutingĪll Contents When the Routing Becomes Part of the CircuitĪs device switching speeds increase, so too do the demands on the printed circuit board designer and the fabricator.Creating and Configuring an Impedance Profile.When the Routing Becomes Part of the Circuit.
0 kommentar(er)
