The magnetic loop inductor is a kind of electronic component. Its main function is an electromagnetic induction conversion. A relatively simple inductor can be a wire, which can be used as an antenna. Converting electrical energy into electromagnetic waves, again a little more complicated, is the hollow wire diagram, which can be used in frequency-selective loops and RF transmitting circuits. Compare the inductance of the latter two, as well as the I-shaped inductor, which can be used for filtering and energy storage. There are also common mode inductors that can be used to prevent interference, etc.     

 The chip on the magnetic ring inductor PC board is not only an electromagnetic interference object, but also a source of electromagnetic interference during the working process. After all, we can divide these electromagnetic interferences into two categories: serial mode interference & # 40; differential mode interference & # 41; and common mode interference & # 40; ground interference & # 41;. Take the two PCB traces on the motherboard ( the wires connecting the components of the motherboard) as an example, the so-called serial mode interference refers to the interference between the two traces; therefore, the common mode interference is also Interference caused by the potential difference between the two traces and the PCB ground. The series mode interference current acts on the two signal lines, and its conduction direction and waveform are consistent with the signal current; the common mode interference current acts between the signal line and the ground wire, and the interference current flows through half of the two signal lines. One and the same direction, and this ground wire is the common circuit.      

        Magnetic toroidal inductors can increase high-frequency loss in the circuit and never introduce DC loss, so it is small in size and easy to install on the lead or wire in the interval, and suppresses the noise signal exceeding 1MHz. The effect is very obvious, so it can be used for decoupling, filtering and parasitic oscillation suppression of high-frequency circuits.

        Low-impedance power supply circuits, resonant circuits, Class C power amplifiers and silicon controlled switching circuits, etc., are very effective using ferrite beads for filtering. The ferrite beads made of magnetic ring inductors can generally be divided into two types: resistive and inductive, which can be selected according to needs when using. The impedance of a single magnetic bead is generally tens to hundreds of ohms. If one attenuation is never enough, multiple magnetic beads can be used in series, but generally, the effect will never increase again when three are exceeded.