ELECTRONIC IDENTIFIER Russian patent published in 2003 - IPC

FIELD: communications engineering. SUBSTANCE: electronic identifiers that can function as phone card with built-in antenna and semiconductor microassembly with identification code has code-producing microassembly and readout controller; inductive coupling between read-out controller disposed inside terminal casing and user s external identifier is effected by means of three-legged ferrite magnetic core carrying several windings constituting low-frequency sound channel and high-frequency identification channel; code-producing microassembly is changeable element made in the form of insulating sheath with contact pads on its surface; insulating sheaths are made as different three-dimensional forms such as ellipsoid, cylinder, or parallelepiped. EFFECT: facilitated access to communication means and to information; ability of acquiring various services including referral ones. 4 cl, 1 dwg