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Recognition code transmission method and circuit arrangement

A technology for identifying codes and circuit devices, applied in electrical components, transmission systems, etc., to solve problems such as failure of reading machine interpretation

Inactive Publication Date: 2003-10-29
HOLTEK SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide an identification code transmission method and circuit device to solve the disadvantage that multiple radio frequency identification tags approach the reader at the same time and transmit signals, which makes the reader fail to interpret

Method used

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  • Recognition code transmission method and circuit arrangement
  • Recognition code transmission method and circuit arrangement
  • Recognition code transmission method and circuit arrangement

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Embodiment Construction

[0031] figure 1 Shown is a schematic diagram of the simultaneous application of multiple RFID tags proposed by the present invention, in which the reader 100 will send a fixed frequency electromagnetic wave 101, when the RFID tags 110, 120, 190, etc. approach the reader The electromagnetic wave 101 can be received, and then enough power is obtained to start the circuits in the tags, and the identification code in each tag is transmitted to the reader 100 through radio waves 111, 121, 191, etc. If there is no special arrangement for the transmission method or transmission time of RFID tags, when multiple RFID tags approach the reader at the same time, because each RFID tag will continue to send identification codes to the reader, if two or two The above radio frequency identification tags send identification codes at the same time, which will cause the reader to fail to correctly read each tag due to data signal collision. In the present invention, the time during which the RFID t...

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Abstract

A device for controlling the transmission of ID code on RF recognition label is composed of a timing circuit, a working region selector consisting of a counter, a random numeral generator and a comparator for comparing the counter's value with the output of random numeral generator to povide an enable signal if they are matched, and a memory for storing the ID code and outputting it when said enable signal is received. It can prevent the collision between labels.

Description

Technical field [0001] The invention relates to an identification code transmission method and circuit device, in particular to an identification code transmission method and circuit device in a radio frequency identification tag (Radio Frequency Identification Tag, RFID). Background technique [0002] Radio Frequency-Identification (RFID) means that the transmitter (radio frequency identification tag) uses radio waves to transmit the identification signal, and the identification terminal receives the radio wave, and then decodes the identification code signal carried in the radio wave to achieve Device system with identification function. This type of system is most often used in such as access control, warehouse management of incoming and outgoing products, or the identification of interactive toys. The RFID Tag or transponder of the RFID system generally contains an antenna and an integrated circuit chip (IC). An identification code (Identification Code) is stored in the RFID ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/59
Inventor 陈锡彬王明坤涂介勇蔡键贤张士庭
Owner HOLTEK SEMICON
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