Efficient Modelling of a PCB Transmission Line for High Speed Digital Systems
Date
2018
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Abstract
This paper proposes a model of PCB traces for high-speed digital systems. The adopted approach involves
predetermined geometry using direct discretization of
transmission lines. Initially, the proposed methodology involves
computing the line propagation delay by employing its geometry
with associated empirical equations. The initial procedure paves
the way to design a Lattice diagram which depicts multiple
reflections that the signal underwent due to impedance
mismatches between transmission lines and loads. Subsequent
computations of electrical model parameters were further done.
Simulation results using Multisim software illustrated a favorable
performance with a time delay of 1.42 ns and an equivalent
electrical model of 10 lumped LC cells. The time delay between
the input and output signal obtained from the simulation was
approximately 15.152 ns corresponding to the time it took for a
transmitted signal to reach a steady state which further signifies
the good performance of our proposed method.
Description
Research Article
Keywords
digital systems, transmission line modelling, PCB traces, signaling, time delay, Lattice diagram