发明名称 |
Electronic identification system. |
摘要 |
<p>An electronic identification system comprises at least one transmitter capable of generating an interrogation field in an interrogation zone and a plurality of responders capable of generating a pre-determined coded signal in response to an interrogation field. The signal can be detected by at least one receiver. According to the invention, the at least one responder has a receiver circuit adapted to be brought into a first mode in which the receiver circuit forms a tuned narrow-banded circuit and into a second mode in which the receiver circuit forms a broad-banded circuit.</p> |
申请公布号 |
EP0297688(A1) |
申请公布日期 |
1989.01.04 |
申请号 |
EP19880201368 |
申请日期 |
1988.07.01 |
申请人 |
N.V. NEDERLANDSCHE APPARATENFABRIEK NEDAP |
发明人 |
HOGEN ESCH, JOHANNES HARM LUKAS;KIP, HARM JACOB |
分类号 |
G01S13/75;A01K11/00;G01S13/76;G01S13/79;G06K19/07;G07C9/00;H04B1/59;(IPC1-7):G07C9/00;G06K19/06 |
主分类号 |
G01S13/75 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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