Separating Signal from Power: New Automotive Inductors from TDK
Inductors such as the ADL3225V devices are useful when you want to use just one conductor to transfer both signal and power.
I still find myself somewhat intrigued by the way in which electrical signals of different frequency can peacefully coexist. There is something counterintuitive about this characteristic of the physical world, at least until university courses have immersed us in the Fourier transform and compelled us to concede that the frequency domain is just as legitimate and real as the time domain.