SU1405091A1 - Induction element - Google Patents

Description

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The invention relates to radio engineering, 8 particularly to radio components used in electrical circuits with frequency selectivity, and can be used in the intermediate frequency paths of radio receivers.

The aim of the invention is to reduce the complexity of manufacturing and increase the reliability of the inductive element.

FIG. I presents a design scan; in fig. 2 - inductive element, () b1

The proposed element is a flexible dielectric substrate 1 with conductive tracks 2 on it which are fitted with basic 3, 4 and D () along; 1) cells 11) 1 5 contacts and an area, and, after fixing (for example, gluing) to The dielectric (or 1P1GNOM) base 6, having the shape of a cube (SLI paralle, - | epiped), is a zacopchepuk construction (Fig. 2). The main contact pads are the soiling and the end of the winding, the additional contact pads of the wiring of the conductor and 1i. tracks. Electrodes 7 and 8 serve as the d; 1 switch of the inductive element in the circuit. The inductance adjustment is carried out by connecting the output electrode to the corresponding additional platform 5.

To protect the turns from closure, the substrate is covered with a protective layer (sealed in Fig. 1), which is applied in such a way that open places remain on the conductive paths, which serve as additional contact points 5.

The device works as follows.

The total inductance of a system of magnetized circuits is generally determined by the expression

L th-11

.I and

where Fr is the magnetic flux, the magnitude of which is determined by the geometrical

characteristics of the contour (length, diameter, etc.), which it penetrates;

PF is the magnetic flux characterized by the flux linkage of the partial magnetic fluxes and determined by the spatial orientation of the magnetic circuits; t is the current flowing through the coils.

For the proposed device, the value of F is positive, since the convergence of the current-conducting paths from the external to the internal coil always occurs in one direction.

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Consequently, applying the method of superposition for a linear electric circuit and neglecting partial compensation of magnetic fluxes in the region of the cube ribs, the inductance of the proposed element can be defined as the inductance of the plane of the spiral inductance of equivalent (inductance) dimensions.

Entering the geometrical parameter of the cube H (see Fig. 1) and the geometrical parameter of the square flat-spiral inductor A, we can write the following relations:

  2H; (2)

, 5 VW51n8- 0 (3)

or L3 21HYw -In8-10-3, (4)

where Lj is the inductance equivalent;

W is the number of turns of a flat spiral coil.

In formula (3) when expressing linear dimensions in centimeters, the value of L is obtained in microgens. This value of L can be significantly increased by using a magnetic base in the element.

The use of the invention will allow for the same overall dimensions and the inductance of the element to significantly reduce the labor intensity of manufacturing and increase operational reliability by reducing the number of switching connections.

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FIG. 2

Claims (1)

An INDUCTIVE ELEMENT containing a dielectric substrate made in the form of a cube, on five faces of which is placed a winding in the form of conductive paths equipped with primary and secondary contact pads, the main contact pads being the beginning and end of the winding, characterized in that, in order to reduce the complexity manufacturing and improving reliability, each coil of the winding is located on five faces, the main and additional contact pads of all turns of the winding are located on one face, tion pads are located on the conductive tracks. Fig!