Welcome to this installment of EE Classroom on RF inductors and Magnetics
Even the most sophisticated electronics designs for communications, automotive, industrial, space, military and space environments incorporate the simple inductor. Selecting an inductor for a given circuit in your specific application still involves some research and basic understanding of the types of inductors available and their unique properties.
In this classroom, we’ll cover the basics of inductor properties, magnetism, EMI, and inductance, and the design of analog active filters. You’ll learn about measuring inductance, how to avoid EMI, and the distinctions between active and passive filters and their key parameters. For an RF and microwave refresher, check out the answers to the frequently asked questions around noise figures and the various bandpass filter implementations. Finally, four application notes take you through basics of inductors, conical inductors, LC filters, and ferrite beads.
And, remember, it’s a classroom – so keep the “noise” down…
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Magnetics • Test & Measurement
Power supply designers take a hard look at soft magnetics
Any conductive body has a certain finite inductance. This inductance is an intrinsic property of a conductive body and it is always the same.
Measuring active and passive filters
Mutual inductance & transformers: when EMF becomes EMI
The promise of high efficiency and small size brought by super-fast switching power supplies could be delayed by a lack of magnetic materials that are up to the task.
In regard to their intended purpose, electronic filters are classified according to the specific part(s) of the spectrum that they pass or reject.
There’s a lot of formulas involving integrals, derivatives, differential equations, and more that explain the precise relationships between electricity and magnetism.