Stub or No Stub?

摘要

We Will Discuss how to evaluate a network topology towards achieving optimum signal quality. Two different topologies - one with and one without a stub - are analyzed via PSpice simulations. When designing a high-speed PCB the correct choice of topology (i.e., physical or logical arrangement of nodes on a network) can prove critical to signal quality and system performance. Simulation provides an effective means for ascertaining the optimum topology. For instance, two different schemes for connecting components of a net consisting of three ICs and a resistor are illustrated in FIGURE 1.