磁珠专用于抑制信号线、电源线上的高频噪声和尖峰干扰，还具有吸收静电脉冲的能力。磁珠是用来吸收超高频信号，像一些RF电路，PLL，振荡电路，含超高频存储器电路（DDR SDRAM，RAMBUS等）都需要在电源输入部分加磁珠，而电感是一种蓄能元件，用在LC振荡电路，中低频的滤波电路等，其应用频率范围很少超过50MHZ。-Inhibition of signal lines dedicated to beads, the power line frequency noise and interference peak, also has the ability to absorb the static pulse. Bead is used to absorb the high frequency signal, as some RF circuits, PLL, oscillator circuits, including ultra-high frequency memory circuit (DDR SDRAM, RAMBUS, etc.) need to increase the power input part of the bead, while the inductor is a store to components used in the LC oscillator circuit, the low-frequency filter circuit, the application frequency range rarely exceeds 50MHZ.