Common types of inductors

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Common types of inductors

Common types of inductors: small inductors, adjustable inductors, choke inductors

The inductor can be made of a coiled core of electrically conductive material, typically a copper wire, or the core can be removed or replaced with a ferromagnetic material. A core material having a higher magnetic permeability than air can tightly constrain the magnetic field around the inductance element, thereby increasing the inductance. There are many types of inductors, most of which are made of an outer enamel coated wire around a ferrite bobbin, and some protective inductors place the coil completely inside the ferrite. The core of some inductive components can be adjusted. This can change the size of the inductor. Small inductors can be etched directly onto the PCB, using a method of laying spiral traces. Small value inductors can also be fabricated in integrated circuits using the same process of fabricating transistors. In these applications, aluminum interconnects are often used as conductive materials. Regardless of the method used, the most practical application of constraints is a circuit called a "rotator" that uses a capacitor and active components to exhibit the same characteristics as an inductive component. Inductive components for high frequency isolation often consist of a wire that passes through a magnetic column or magnetic bead.