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Due to the use of ferrite magnetic beads in circuits that can increase high-frequency losses without introducing direct current losses, and are small in size and easy to install on leads or wires in intervals, their suppression effect on noise signals above 1MHz is very obvious. Therefore, they can be used for decoupling, filtering, and parasitic oscillation suppression in high-frequency circuits. The use of ferrite beads for filtering is very effective in low impedance power supply circuits, resonant circuits, Class C power amplifiers, and thyristor switching circuits. Ferrite magnetic beads can generally be divided into two categories: resistive and inductive, and can be selected according to needs during use. The impedance of a single magnetic bead is generally between ten to several hundred ohms. When applying, if one attenuation is not enough, multiple magnetic beads can be used in series, but usually the effect will not increase significantly when there are more than three.

Due to the inevitable presence of lead resistance, lead inductance, and stray capacitance in any transmission line, a standard pulse signal is prone to overshoot and ringing after passing through a longer transmission line. Under the condition of the same rise time at the pulse front, the larger the lead inductance, the more severe the upsurge and ringing phenomenon. The larger the stray capacitance, the longer the rise time of the waveform. However, an increase in lead resistance will reduce the amplitude of the pulse. In practical circuits, series resistors can be used to reduce and suppress overshoot and ringing.

Ferrite suppression components are also widely used in printed circuit boards, power lines, and data lines. If ferrite magnetic beads are added to the power line inlet of the printed circuit board, high-frequency interference can be filtered out. Ferrite magnetic rings or beads are specifically designed to suppress high-frequency and peak interference on signal and power lines, and they also have the ability to absorb electrostatic discharge pulse interference. The numerical values of the two components are directly proportional to the length of the magnetic beads, and the length of the magnetic beads has a significant impact on the suppression effect. The longer the length of the magnetic beads, the better the suppression effect.