Our designs are becoming faster to serve our ever-growing demands from machines. Speed brings more complexity to the design. The usual slow transitions from 0 to 1 and 1 to 0 become so fast that such “digital” signals have to be treated very differently. Since you are already reading this, you have some idea about what signal integrity means. In short, signal integrity is a process that tries to maintain the signal shape all the way from the transmitter to the receiver. In complex circuits having DDR memories, we get to deal with tens or even hundreds of parallel signals. Some of them need to have equal lengths, while some signals require could jump out of their lane and disturb the neighbours. Correspondingly, almost all of the signals requiring a “signal integrity” check need an impedance-controlled route for the signals to flow. The Signal Integrity tool in Altium Designer helps us run various checks on a fully or partially routed PCB to verify signal integrity on a set of signals. <\/p>\n\n\n\n
In this article, I will be trying out the Altium Designer signal integrity<\/a> tool on a PCB having Lattice Crosslink-NX<\/a> part and a HyperRAM<\/a>.<\/p>\n\n\n\n Things get easier when you use the parameter set to define rules for a set of connections. This allows you to define a fixed set of rules on multiple connections at once and that way you don’t have to do it manually for every net.<\/p>\n\n\n\nSetting up the tool<\/h2>\n\n\n\n
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