| ??? 03/02/05 21:58 Read: times |
#88925 - resistance vs inductance Responding to: ???'s previous message |
Joseph Hebert said:
I would take exception to describing the current density distribution as "running freely over the PCB." In fact, the current density may well be limited in the plane that is directly beneath the trace, especially if you are using very narrow traces, but the return current will not simply take off in a random direction. It will follow the path of least resistance. The return current always follows the path of least inductance, which is, as you say, generally directly underneath the trace (assuming that there's a ground plane there). -a |
