![]() In Proteus, this is all handled via a single dialogue form where the topology of the serpentine can be controlled. Depending on the signal rise time, the frequency of the signal, the requirement for via sites on the PCB and many other factors the PCB designer may need to adjust or constrain serpentine height and width. ![]() ![]() Much of the difficulty with length matching lies in the arrangement of the extra trace used to lengthen the shorter routes (often called the serpentine). This includes the ability have track segments in multiple matchgroups which is needed for routing topologies like the DDR3 fly-by configuration. Proteus includes support for automatic length matching of tracks via a simple select and match user interface. ![]() Length matching of tracks is an essential step in ensuring correct timing at the signal receiver for high speed transmissions. ![]()
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