Electronics: Difference between revisions
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The "lumped element model" concentrates components to single points, and assumes ideal (simple) behavior. This induces a graph of finitely many planes, and allows us to work with ODEs rather than PDEs. It's more useful IMHO to relax the concentration, and treat components as ordered cycles corresponding to their geometry. In this model, when wires intersect, they become a single wire. A wire is a node, and each pin is a node. | The "lumped element model" concentrates components to single points, and assumes ideal (simple) behavior. This induces a graph of finitely many planes, and allows us to work with ODEs rather than PDEs. It's more useful IMHO to relax the concentration, and treat components as ordered cycles corresponding to their geometry. In this model, when wires intersect, they become a single wire. A wire is a node, and each pin is a node. | ||
==PCB design== | |||
* Longer traces add inductance | |||
* Thinner traces add more resistance than wider ones. | |||
** For lowspeed, simple traces of length L, area A, and material resistance ρ: R = ρ(L/A) | |||
* Wider traces add more impedance than thinner ones. | |||