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Fixed Inductors

Fixed inductors are two-terminal devices found in both electronic and electrical devices. They provide inductive reactance, which is an important factor in regulating current flow in electrical and electronic circuits. The CM322522-820JL is one such type of fixed inductor, with specific applications and a unique working principle.

Application of CM322522-820JL

The CM322522-820JL is a fixed inductor from the CM322522/CM-H series of chip inductors. It is typically used in general purpose applications such as switching regulators, filters, and transformer coupling, as well as for WiFi filtering and parts of radio frequency integrated circuits (RFICs).

The CM322522-820JL is also suitable for use in receivers, RF amplifiers, ultra-low noise amplifiers, lines and filter circuits, wireless systems, and nearly all types of electronics and electrical systems. It is typically used in the frequency range of 0.3 to 3.0GHz, and its self-resonant frequency goes up to 3.2GHz.

It is a single-ended knotted type inductor with an Vishay 1008 (EIA) size and a 5050 - 10 mils (0.25 mm) height. It has a Ferrite core material, and features a small chip size and high resistance to moisture, making it suitable for use in surface-mount applications. It has an inductance of 8.2 nH, a saturation current of 2 A, and a DC resistance of 0.12 ohms. Other features include good high frequency and large current resistance characteristics.

Working Principle

The working principle of a fixed inductor is essentially based on Faraday\'s law of electromagnetic induction. When a conductive wire passes an electric current, a magnetic field is created around the wire. This magnetic field will then induce an electric field, which in turn will induce a current in the wire itself.

In the case of the CM322522-820JL, the inductor is a coil of wire surrounded by a ferrite core, which is a type of non-metallic magnetic material. The ferrite core helps to shape the magnetic field created by the coil of wire and decrease the amount of magnetic field leakage. When an electric current passes through the coil, the magnetic field created by it will induce an alternating current in the coil, as per Faraday\'s law.

This alternating current will then oppose the original electric current, resulting in a reduction in the amount of current passing through the coil. This will result in an inductive reactance in the circuit, which will act as a filter, as it will reduce the amount of current that can pass through it.

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