公开(公告)号：US5345231A

公开(公告)日：1994-09-06

申请号：US748942

申请日：1991-08-23

申请人： Roland Koo ,  Gerald Holweg

发明人： Roland Koo ,  Gerald Holweg

IPC分类号： H04B1/59 ,  G06K7/00 ,  G06K19/07 ,  G07B15/06 ,  G08C19/02

CPC分类号： G07B15/063 ,  G06K19/0723 ,  G06K7/0008 ,  G06K7/10039

摘要： A contactless inductive data transmission system provides bidirectional signal transfer between a sending-and-receiving station and one or more batteryless transponders. A high-frequency signal from the sending-and-receiving station is pulse width modulated for data transmission to a transponder and provides a system clock, which is extracted in both the sending-and-receiving station and in the transponder for synchronization, and provides the electrical power for operation of the transponder. The pulse width modulated signal is demodulated in the transponder for triggering a response wherein a modulating signal is applied by load modulation to the pulse width modulated high-frequency signal to form an information-carrying load modulated high-frequency signal, which is demodulated in the sending-and-receiving station.

摘要翻译： 无接触感应数据传输系统在发送和接收站与一个或多个无电池转发器之间提供双向信号传送。 来自发送和接收站的高频信号被脉冲宽度调制以用于数据传输到应答器，并且提供系统时钟，其在发送和接收站以及应答器中提取用于同步，并提供 用于应答器操作的电源。 脉冲宽度调制信号在应答器中进行解调，用于触发响应，其中通过负载调制将调制信号施加到脉宽调制高频信号，以形成信息载入负载调制高频信号，其在 发送接收站。