NFC READER HAVING A LOW ENERGY CONSUMPTION PASSIVE OPERATING MODE

摘要

The invention concerns an inductive coupling reader (50) comprising a passive interface circuit (16) for modulating the impedance of an antenna circuit (13) and extracting from the antenna circuit a data signal (SDTr) and an RF clock signal (CKO), and means (DB3) for connecting the reader to a removable security module (40, 43). The invention is characterized in that the reader comprises an emulation circuit (17) for opening a RF communication channel with another reader, a non removable electrical connection connecting the emulation circuit (17) to the passive interface circuit (16), whereby the data signal (SDTr) and the RF clock signal (CKO) are supplied to the emulation circuit (17) and a data bus (DB3) timed by a bus clock signal of lower frequency than the RF clock signal frequency, to connect the emulation circuit (17) to the removable security module (40, 43). The invention provides the advantage of producing a low energy consuming reader.