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3. 发明公开

EP0777191A1 Method and system for contactless exchange of data between a read/write unit and one or more information carriers 失效
标题翻译：方法和系统，用于数据的读/写单元和一个或多个数据载波之间的非接触式交换
公开(公告)号：EP0777191A1
公开(公告)日：1997-06-04
申请号：EP96203366.8
申请日：1996-11-28
申请人： Van Santbrink, Ronald Barend
发明人： van Santbrink, Ronald Barend , Langedijk, Dirk , Exalto, Jan Peter
IPC分类号： G06K7/00
CPC分类号： G06K7/10039 , G06K19/0723
摘要： A method and system for contactless exchange of information between a read/write unit and at least one information carrier, using wireless radiofrequency signal transmission, said unit comprising an input/output circuit and associated coil means and the information carrier comprising another input/output circuit and associated coil means, and each further comprising a processing circuit. The read/write unit transmits radiofrequency signals divided in time slots, each successively including a sync pulse and a single data bit. The radiofrequency signal is suppressed in each time slot for a period differing in length for the one and other single data bit. The data bit signal, received in the read/write unit solely during transmission of the radiofrequency signal, is sampled, after rectification, for detection of the data bits of the information carrier.
The read/write unit comprises a detector having two sample and hold circuits in parallel, to which the input signal after rectification is applied in parallel and to which sampling pulses are applied by the processing circuit for sampling successively in time of the signal.
摘要翻译：一种用于读/写单元和至少一个信息载体之间的信息接触交换，利用无线射频信号传送方法和系统，所述单元的输入/输出电路，其包括与相关联的线圈装置和所述信息载体，其包括另一输入/输出电路和相关联的线圈的装置，及进一步包括一个处理电路。读/写单元传送划分为时隙，每个依次包括同步脉冲和单个数据比特射频信号。射频信号在一段长度为所述一个和其他单数据比特不同的每个时隙被抑制。数据位信号，仅由无线频率信号的传输期间，在读/写单元接收，进行采样，整流之后，检测用信息载体的数据比特。读/写单元包括具有两个采样和保持电路并联，向其中整流之后的输入信号被施加在并行和哪个采样脉冲由该处理电路被施加在信号的时间依次进行采样的检测器。

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