Materials-Ferroxcube

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.

MnZn
NiZn

Material	µi at 25 ° C	Bsat (mT) at 25 ° C (1200 A/m)	Tc(° C)	p (Ωm)	Ferrite type	Remark
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
4A11	850	≈ 340	≥ 150	≈ 10^5	NiZn	freq. < 1 MHz
4B2	250	≈ 360	≥ 335	≈ 10^5	NiZn	freq. < 5 MHz;
4C65	125	≈ 380	≥ 350	≈ 10^5	NiZn	freq. < 15 MHz
4D4	50	≈ 340	≥ 300	≈ 10^5	NiZn	freq. < 80 MHz
4E1	15	≈ 220	≥ 500	≈ 10^5	NiZn	freq. < 200 MHz

Signal Processing

MnZn

NiZn