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    • 8. 发明申请
    • TRANSPONDER
    • 应答器
    • WO2003056508A1
    • 2003-07-10
    • PCT/IB2002/004999
    • 2002-11-27
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.CANTATORE, Eugenio
    • CANTATORE, Eugenio
    • G06K19/07
    • G06K19/0723
    • An identification transponder (IDT) for supplying an identification code to a base station (BS) varies an RF signal transmitted by the base station (BS) in a rhythm that corresponds to the identification code. The identification transponder (IDT) has identification code generation means (IDCG) for generating the identification code, rectifier means (RTF) for AC coupling with the base station (BS) for applying a supply voltage (V1) to the identification code generation means (IDCG), a modulation transistor (TM), voltage adaptation means (VADPT) for adapting the voltage levels of the identification code and for supplying the code with adapted voltage levels to a control terminal of the modulation transistor (TM), and further rectifier means (FRTF) for the aforementioned AC coupling to the base station (BS) for applying a separate supply voltage (V2) to the voltage adaptation means (VADPT). The modulation transistor (TM) may perform two tasks: the task of rectifying the RF signal, and the task of supplying a variable load to the rectifier means (RTF). The variable load varies in the rhythm. As a consequence, the input current of the rectifier means (RTF) is varied in the rhythm, which in its turn varies the RF signal. This variation in the RF signal is detected in the base station (BS).
    • 用于向基站(BS)提供识别码的识别应答器(IDT)以与识别码对应的节奏改变由基站(BS)发送的RF信号。 识别应答器(IDT)具有用于生成识别码的识别码产生装置(IDCG),用于与基站(BS)AC耦合的整流装置(RTF),用于向识别码产生装置施加电源电压(V1) IDCG),调制晶体管(TM),电压适配装置(VADPT),用于使所述识别码的电压电平适配并将适合的电压电平的码提供给所述调制晶体管(TM)的控制端,以及其它整流装置 (FRTF),用于将前述的与基站(BS)的AC耦合用于向电压适配装置(VADPT)施加单独的电源电压(V2)。 调制晶体管(TM)可以执行两个任务:整流RF信号的任务以及向整流装置(RTF)提供可变负载的任务。 可变负载在节奏中变化。 因此,整流装置(RTF)的输入电流在节律中变化,从而改变RF信号。 在基站(BS)中检测RF信号中的这种变化。