| 摘要 |
The invention concerns an active transponder (10) comprising an antenna (3), processing means (5) for receiving and supplying the antenna with identification data to be transmitted, powering means (7) for supplying a first signal (V1), storage means (12) for storing electric power and supplying a second signal (V2), and switching means (16) for connecting the processing means to the storage means or to the powering means. Said transponder also comprises first and second means (14, 15) for comparing the first and second signals with a predetermined threshold, and the switching means produces said connection on the basis of said comparisons. Such a transponder is useful for determining whether the voltage supplied by the powering means are sufficient for providing electric power to the different transponder components, in particular for ensuring the desired functions. |
