JPS61140617U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an embodiment of this invention, Figure 2 is its electric circuit diagram, and Figures 3a and b are circuit diagrams and structural diagrams of a filter circuit using the two types of cores shown in Figure 1. , Fig. 4 is a diagram showing the attenuation characteristics of the filter circuit shown in Fig. 3, Fig. 5 a and b are a circuit diagram and structural diagram of a filter circuit using the two types of cores shown in Fig. 1 alone, and Fig. 6 and Fig. 7 is a diagram showing the attenuation characteristics of the filter circuit shown in Fig. 5, Fig. 8 is a circuit diagram of a filter circuit using the two types of cores shown in Fig. 1 connected in series, and Fig. 9 is a diagram showing the attenuation characteristics of the filter circuit shown in Fig. 8. Figure 10 is a perspective view showing another embodiment of this invention, Figures 11a and b are perspective views of the core of Figure 10, and Figures 13a and b are conventional FIG. 13 is a perspective view showing an example, FIG. 13 is an electric circuit diagram thereof, FIG. 14 is a diagram showing the initial magnetic permeability of various ferrites, and FIG. 15 is a circuit diagram of a filter circuit using the core of FIG. 12. 10, 11, 17, 18... core, 12a, 1
2b...Chiyoke coil.

Claims (1)

[Scope of utility model registration request] A filter device for preventing interference waves, comprising a noise filter formed by laminating two types of cores of different materials or shapes, and winding a coil around the core.