FIELD: manufacturing technology.
SUBSTANCE: invention relates to multifunctional circuit with multi-turn coil, method of such circuit control in mobile device. Disclosed is multifunctional circuit with multiturn coil, containing multi-turn coil, switch, NFC matching circuit and additional camera board, wherein switch has common port, first port and second port, multiturn coil is connected to common port, NFC matching circuit is connected with first port, and additional camera board is connected to second port. In presence of camera control signal second port changes into conducting state so, that multiturn coil acts as camera focus adjustment coil for camera on camera additional board, and with absence of camera control signal first port changes into conducting state so, that multiturn coil acts as NFC antenna in NFC matching circuit. Alternatively NFC antenna is directly built-in into main board, thus preventing incomplete contact of NFC antenna contact pads caused by frequent removal of storage battery cover.
EFFECT: technical result is higher stability of near-field communication (NFC) antenna operation.
8 cl, 3 dwg
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