The two ideas are similar and are applied to ensure a signal is read by the load component connected to an interconnect. If you read any guidelines on signaling standards or read datasheets for high speed/high frequency components, you’ll see plenty of talk of impedance matching and termination. Whether you’re working with coaxial cables or PCB traces, long interconnects need impedance matching to ensure power transfer and prevent reflection The correct method for analyzing impedance matching in a transmission line requires examining the input impedance at each interface along an interconnect. Most impedance matching guidelines do not explicitly mention the input impedance of an interconnect, which will determine the S-parameters (specifically return loss). Impedance matching in transmission lines is enforced to prevent reflections along an interconnect.
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