4922R-821K

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Fixed Inductors

Fixed inductors, such as the 4922R-821K, are common components in electronic circuits. They are used for performing digital signal processing, power supply filtering, and high-frequency signal isolation, among other applications. This article will explore what a 4922R-821K fixed inductor is, its application field and working principle.

What is a 4922R-821K Fixed Inductor?

The 4922R-821K is a type of fixed inductor, a type of electronic component that is designed to store energy in a magnetic field and release it when needed. In this case, the fixed inductor has a relatively low self-resonant frequency range of 15 MHz to 200 MHz. It is a surface mount part that is relatively small, measuring 0.2mm thick and 3.2 mm in length.

Application Field

The 4922R-821K fixed inductor has a wide range of applications. It is commonly used in power supply filter circuits, in which it helps to reduce voltage fluctuations and noise. The inductor is also used in digital signal processing (DSP) circuits, which filter noise as well as smooth out power irregularities. Because it has a relatively high inductance of 820 nanohenrys, the 4922R-821K is highly effective in these applications.

The 4922R-821K is also used in high-frequency isolation circuits, which act like a shield to protect sensitive components from interference from external sources. The inductor’s high quality factor ensures that it’s capable of efficiently blocking out any unwanted signals. In addition, its low self-resonant frequency allows for efficient interference rejection from a wide range of frequencies.

Working Principle

Fixed inductors like the 4922R-821K work according to the principle of electromagnetic induction. When an alternating current passes through the winding of the inductor, it creates a magnetic field. This field then induces a voltage across the winding, which is proportional to the rate of change of the current and inversely proportional to the inductance of the inductor. This induced voltage is then used to help filter and isolate high-frequency signals.

To ensure that the inductor operates efficiently, it must be properly designed. The winding of the 4922R-821K is constructed from a combination of copper wires and ferrite beads, which are carefully chosen to maximize the inductor’s effectiveness. The ferrite beads reduce the inductor’s resistance, thus increasing its ability to carry higher currents without heating up.

Once the inductor is designed and constructed, it must be tested to ensure that it meets its specified performance levels. Common tests performed on fixed inductors include inductance testing, temperature stability testing, and resonance testing. Only once the inductor has passed all tests will it be deemed fit for use in an electronic circuit.

Conclusion

The 4922R-821K is a fixed inductor designed for digital signal processing, power supply filtering, and high-frequency signal isolation applications. It has a wide range of applications and a good quality factor, allowing it to effectively filter and isolate high-frequency signals. The inductor is constructed from copper wires and ferrite beads, and its efficiency is further tested before it is deemed fit for use in an electronic circuit.

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