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: 2007-04-04
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]FIG. 1 is a schematic diagram of the simultaneous application of multiple radio frequency identification tags (RFID Tags) proposed by the present invention, wherein the reader 100 will send a fixed frequency electromagnetic wave 101, when the radio frequency identification tags 110, 120, 190, etc. are close to the reader The electromagnetic wave 101 can be received immediately, and then enough power can be obtained to make the circuits in these tags start to work, and the identification codes in each tag can be 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 the RFID tag, when multiple RFID tags are close to the reader at the same time, because each RFID tag will continue to send the identification code to the reader, if two or two The above radio frequency identification tags send identification codes at the same time, that is, the reader cannot correctly interpre...

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PUM

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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 a circuit device, in particular to an identification code transmission method and a circuit device in a radio frequency identification tag (Radio Frequency Identification Tag, RFID). Background technique [0002] The radio frequency identification system (Radio Frequency-Identification, RFID) means that the transmitter (radio frequency identification tag) uses radio waves to transmit identification signals, and after the identification terminal receives the radio waves, it decodes the identification code signal carried in the radio waves, and then realizes Device system for identification function. This type of system is most commonly used in access control, warehouse management of incoming and outgoing goods, or identification of interactive toys. A radio frequency identification tag (RFID Tag or transponder) of a radio frequency identification system generally includes an antenn...

Claims

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Application Information

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Patent Type & Authority Patents(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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