| 摘要 |
An identification device comprising a transponder ( 2 ) that can be read by means of a transmitter/receiver unit ( 11 ) arranged to transmit an enquiry signal ( 13 ) to the transponder, where the transponder is arranged to reflect ( 14 ) the enquiry signal and in this way to modulate the enquiry signal with information stored in a memory in the transponder and where the transmitter/receiver unit ( 11 ) is arranged to receive the modulated enquiry signal, which transponder ( 2 ) is integrated into a mobile telephone ( 8 ) and which transponder ( 2 ) is connected to a source ( 6 ) of power. The invention is characterised in that the said source ( 6 ) of power is constituted by the source of power of the mobile telephone used to power the clock of the mobile telephone ( 8 ). |
