FIELD: radio engineering.
SUBSTANCE: invention relates to radio engineering, to radio engineering elements used in frequency selective electric circuits and can be used in intermediate frequency paths of radio receiving equipment. The effect is attained due to the fact that inductive cell contains insulating substrate at which upper and lower surfaces n of metal plating elements is formed; interconnections between plated holes are made so that they form loops of toroidal inductance coil. Beginning and ending of loops are connected with connection pads purposed for installation and changes of inductance value.
EFFECT: provision of changeability within wide limits of inductance value, enhancement of electrical performance, increase in electromagnetic compatibility and interference immunity due to closed magnetic field, range extension of inductance value at size minimisation of inductance cell, reduction of spurious inductance due to general topology optimisation and exclusion of wire bonding.
1 dwg
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