Introduction:Everyone knows that impedance should be continuous. However, as Luo Yonghao said, “In life, there are always times when you step in something unpleasant,” PCB design also has its moments of impedance discontinuity. What should we do? Characteristic Impedance Characteristic Impedance: Also known as “Feature Impedance”, it is not a DC resistance, but a concept … Read more
Source: Battery Technology TOP+Electrochemical Impedance Spectroscopy (EIS) has attracted a lot of attention as a powerful tool for monitoring batteries. The Equivalent Circuit Model (ECM) and the Distribution of Relaxation Times (DRT) method are widely used tools in EIS research. However, EIS faces uncertainties in practical applications in the field of lithium-ion batteries, as many … Read more
“ In the previous article (Why is Circuit Grounding Design Important on PCBA?), we discussed three factors that lead to common impedance coupling interference: the non-zero impedance characteristics of the common return path; multiple systems sharing a common return path; and the low noise tolerance exhibited by circuits due to their unbalanced characteristics. This article … Read more
“Grounding is considered a solution to many EMI issues. However, when grounding is done improperly, the chosen grounding scheme can become part of the problem. This article illustrates the issue of grounding coupling interference through simple examples.” 01 — Common Impedance Coupling According to Ampere’s law (the theoretical cornerstone of EMC grounding concepts – Maxwell’s … Read more