Differential Lines Design of Electronic PCB Card Replicating
Differential lines design in the process of Electronic pcb card Replicating is built on the schematic which has been controlled by impedance. And the model is very like the coaxial cables.
From the process of Electronic pcb card Replicating can produce the original PCB card from the extracted layout, gerber file and schematic diagram, BOM
On the electronic pcb card which is controlled by the impedance, the metal plane layer can be used as the shielding layer, the insulation layer is FR-4 laminate board, and the circuit conductor is the signal track pairs. FR-4 average dielectric constant is 4.2 to 4.5. due to the manufacturing deviation, which can probably cause the over-etching of copper tracks and finally cause the impedance tolerance.
The most precise way to calculate the impedance value of through car diagnostic tool PCB plate copying is using field analysis program (normally it is two dimension, and sometimes is three dimension), it requires limited space to evaluate the MAX equation to the process. The software can analyze the EMI effect according to the line space, line width, line thickness as well as the height of insulation layers.
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