Q.
At what frequency is “impedance”, which is the representative feature of chip beads, prescribed?
- EMC Components >
- Chip Beads
A.
Impedance at 100MHz is generally prescribed.
Impedance at 1GHz is prescribed for the Gigaspira bead, which is also effective at high-frequency bands.
Furthermore, frequency ranges with noise suppression effects can be changed by selecting chip beads with different ferrite materials, even if impedance levels at 100MHz are equal.
