Today, we are going to talk about signal integrity. As a PCB designer, it is important for you to know the effects of via stubs on signal attenuation and data transfer rates.
A transmission line should have a uniform characteristic impedance. Any variation or discontinuities to the impedance causes signal reflection and distortion. Continue reading “How Impedance Discontinuities Affect Signal Integrity”
After establishing what a PCB transmission line is and talking about signal speed and propagation delay, and the critical length, the controlled impedance, and the rise/fall time of a PCB transmission line, we discussed impedance discontinuity and signal reflection. Today, we are going to explain how to analyze a PCB transmission line using quantities, such as voltages and currents, and line parameters, such as resistance, inductance, capacitance, and conductance.
After explaining the importance of the signal speed and propagation delay in a PCB transmission line, we are now going to talk about the transmission line effects, the critical length, the rise/fall time and when the length of an interconnection is to be considered as a controlled impedance transmission line.
During DesignCon 2018, we interviewed many PCB experts. Antonio Ciccomancini Scogna is one of them. He works as a Principal Engineer at Samsung, and part of his mission is to solve signal integrity issues that can appear when designing printed circuit boards for powerful smartphones.
Last week, we talked about what a PCB transmission line is. We are now going to focus on the technical side and discuss signal speed and propagation delay, two factors that have a great impact on a transmission line.
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