Signal

ferroxcube_material_img02

The main application areas for signal processing are telecom filters, proximity sensors, wideband signal transformers, pulse transformers and delay lines. 

For filter and sensor applications, it requires medium permeability, low loss and high stability over periods of time. For wideband signal transformers which are frequently used in communication systems and digital networks such as ISDN and DSL, high permeability are needed.

In many electronic devices, it is necessary to delay pulses for a short, well defined time. The delay time is determined by the saturation flux in the ferrite core and the applied voltage. Requirements for the material are: high pulse permeability and high saturation flux density.

Material µi at 25 ° C Bsat (mT) at
25 ° C (1200 A/m)
Tc(° C) p (Ωm) Ferrite type Remark Datasheet
3B46
3800
≈ 545
≥ 255
≈ 10
MnZn
High DC bias
3B7
2300
≈ 440
≥ 170
≈ 1
MnZn
Temperature stable
3D3
750
≈ 380
≥ 200
≈ 2
MnZn
High freq filter
3H3
2000
≈ 360
≥ 160
≈ 2
MnZn
Low freq filter
Material µi at 25 ° C Bsat (mT) at
25 ° C (1200 A/m)
Tc(° C) p (Ωm) Ferrite type Remark Datasheet
4A11
850
≈ 340
≥ 150
≈ 105
NiZn
freq. < 1 MHz
4B2
250
≈ 360
≥ 335
≈ 105
NiZn
freq. < 5 MHz; 
4C65
125
≈ 380
≥ 350
≈ 105
NiZn
freq. < 15 MHz
4E1
15
≈ 220
≥ 500
≈ 105
NiZn
freq. < 200 MHz