Title:
【発明の名称】呼び出し応答システム
Document Type and Number:
Japanese Patent JP2823208
Kind Code:
B2
Abstract:
A transponder arrangement is described comprising an interrogation unit (10) which sends an RF interrogation pulse to at least one responder unit (12). The responder unit (12) then transmits back data stored therein in the form of a modulated RF carrier to the interrogation unit (10). In the responder unit (12) is an energy accumulator (136) which stores the energy contained in the RF interrogation pulse. The responder unit (12) further contains means (142, 148) which in dependence upon the termination of the reception of the RF interrogation pulse and the presence of a predetermined energy amount in the energy accumulator (126) initiate the excitation of an RF carrier wave generator (130, 132, 134) operating with the frequency contained in the RF interrogation pulse. Further means (158, 192) are provided which from the output signal of the RF carrier wave generator (130, 132, 134) generate a control signal which is utilized to maintain the RF carrier wave and to modulate the RF carrier to be sent back with the stored data.
Inventors:
Joseph Har. Shareman
Application Number:
JP19257088A
Publication Date:
November 11, 1998
Filing Date:
August 01, 1988
Export Citation:
Assignee:
Texas Instruments Deutschland Gesellschaft Mitt Beschlenktel Haftunck
International Classes:
A01K11/00; G01S13/78; G01S13/75; G01V15/00; G06K7/00; G06K19/07; G07C9/00; (IPC1-7): G01S13/78
Domestic Patent References:
| JP6249278A | ||||
| JP54120592A | ||||
| JP61156502U |
Attorney, Agent or Firm:
Akira Asamura (3 outside)