发明名称 |
Contactless inductive data-transmission system |
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.
|
申请公布号 |
US5345231(A) |
申请公布日期 |
1994.09.06 |
申请号 |
US19910748942 |
申请日期 |
1991.08.23 |
申请人 |
MIKRON GESELLSCHAFT FUR INTEGRIERTE MIKROELECTRONIK MBH |
发明人 |
KOO, ROLAND;HOLWEG, GERALD |
分类号 |
H04B1/59;G06K7/00;G06K19/07;G07B15/06;(IPC1-7):G08C19/02 |
主分类号 |
H04B1/59 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|