发明名称 Validation of the presence of an electromagnetic transponder in the field of a reader
摘要 A method for controlling an electromagnetic field generation terminal using a signal for exciting an oscillating circuit, provided with circuitry for regulating the signal phase in the oscillating circuit, including comparing current values of variables linked to the current in the oscillating circuit and to the voltage thereacross with predetermined values, to detect the presence of a transponder in the electromagnetic field.
申请公布号 US2002011922(A1) 申请公布日期 2002.01.31
申请号 US20010853891 申请日期 2001.05.11
申请人 WUIDART LUC 发明人 WUIDART LUC
分类号 G06K17/00;G01S13/75;G01S13/76;G01S13/79;G06K7/00;H04B1/59;(IPC1-7):H04Q5/22 主分类号 G06K17/00
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