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Fixed Inductors is a type of passive electrical component used to provide a fixed inductance. It consists of a coil of metal wire wrapped around a core, usually a ferrite core. The inductance can be adjusted by changing the number of turns in the coil or by changing the core material.

Inductors are used in a variety of applications such as filtering out frequencies in radio and audio circuits, preventing voltage spikes, and forming tuned resonant circuits. In the field of embedded systems, they are used for switching regulators, DC-DC converters, and signal conditioning.

For embedded applications, it is common to use surface mount IC inductors. These are available in a variety of sizes, inductance values, and current ratings. They also come in packages such as QFN (Quad Flat No-lead), SOIC (Small Outline Integrated Circuit), TSOP (Thin Small Outline Package), and BGA (Ball Grid Array).

In order to understand the working principle of inductors, we must first understand the concept of inductance. Inductance is the ratio of the induced voltage to the rate of change of the current. In other words, it is a measure of how much the electric field around a conductor changes as current flows through it.

The basic principle is that an alternating current will induce a voltage in a coil of wire. This is the basis of how transformers work. The same effect can be used in an inductor to produce a steady voltage across the ends of the coil. This voltage in turn is used to create an electrical current in the circuit.

Inductors can also be used as filters. This is done by adjusting the number of turns in the coil or by using a ferrite core that has a higher permeability. This creates an inductance that blocks out certain frequencies in the circuit, allowing only specific signals to pass through.

Inductors are also used in buck and boost regulators. The inductor is used to store energy in a magnetic field which is then released during low load conditions. This helps to maintain a regulated output voltage, allowing the system to be more efficient and stable.

Inductors are also used in radio frequency (RF) circuits, for tuning antennas, modulators and amplifiers. They are also used in motor control applications, providing the necessary starting current for motors and controlling the speed of the motor.

Inductors are also widely used in inverters, converters and pulse transformers. These are used in voltage regulators, AC-DC converters, and PWM controllers. Inverters convert DC to AC while converters do the opposite. Pulse transformers are used to transmit data in high-speed electronic circuits.

Inductors are an integral component in many different applications. They provide electrical components with a steady, reliable source of voltage and current and can also be used to filter out certain frequencies or voltages. They provide stability in power systems and are used in a variety of devices ranging from electronic circuits to motor controls. They are an essential part of many circuits and systems.

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