Decoder and radio frequency card

A decoder and flip-flop technology, applied in the field of electrical communication, can solve the problems of limited processing signal range, groove width limitation, etc.

Active Publication Date: 2007-02-14
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0026] The purpose of the present invention is to provide a decoder aimed at solving the problems ex...

Method used

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  • Decoder and radio frequency card
  • Decoder and radio frequency card
  • Decoder and radio frequency card

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Embodiment Construction

[0082] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0083] The invention obtains the decoding clock signal clk_128 of the radio frequency card through the groove indication signal and the carrier signal, so that the decoding of the improved Miller code in the radio frequency card is not affected by the change of the groove width, and can be flexibly applied to the actual radio frequency card circuit middle.

[0084] Figure 5 It shows the radio frequency card decoder provided by the present invention, including a pulse generation unit 51 , a clock generation unit 52 and a data decoding unit 53 . Wherein, the pulse generation unit 51 generates t...

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Abstract

This invention provides a kind of decoders and RF cards, in which, said decoder includes: a pulse generating unit used in monitoring grooves of carrier envelope signals and carrier clock signals to trigger the uprising edge and trailing edge generating groove indication signals separately, a clock generating unit used in generating divided clock signals based on the groove indication signals and divided clock signals and a data decoding unit used in carrying out succeeded decode operation based on the indication signal and the divided clock signal, which gets the decode clock signals of the RF card based on the groove indication signals and carrier clock signals, so that, decoding of the RF card is not influenced by the width of the groove in the signal and processes signals generated by multiple paper tape punch/readers.

Description

technical field [0001] The invention belongs to the field of electric communication, and in particular relates to a decoder and a radio frequency card in radio frequency identification. Background technique [0002] Radio Frequency Identification (RFID) is a hot technology that has been researched and promoted in recent years. RFID involves a wide range of fields. It generally refers to all technical means that use radio frequency signals to achieve automatic identification and identity authentication, that is, identified labels The card communicates wirelessly with radio frequency signals to the reader that recognizes it. The non-contact integrated circuit (Integrated Circuit, IC) card using RFID technology is mainly the close-coupled non-contact IC card defined by the International Organization for Standardization (ISO) 14443 and the close-coupled non-contact IC card defined by ISO15693. , referred to as radio frequency card. In terms of tickets for buses, subways, acces...

Claims

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Application Information

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IPC IPC(8): G06K19/07G06K7/00H04B1/59
Inventor 刘圣慧蔡静
Owner HUAWEI TECH CO LTD
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