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Transponder unit, system and method for contactless data transmission

A data transmission, contactless technology, used in digital transmission systems, transmission systems, near-field transmission systems using transceivers, etc., and can solve problems such as data transmission interference and clock skew

Active Publication Date: 2018-01-26
INFINEON TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Precisely in the case of longer transmission times of the transponder units, this can lead to clock deviations and thus to disturbances in the data transmission

Method used

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  • Transponder unit, system and method for contactless data transmission
  • Transponder unit, system and method for contactless data transmission
  • Transponder unit, system and method for contactless data transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] figure 1 A first exemplary embodiment of a transponder unit 100 for contactless data transmission with a reading device 200 is shown. The transponder unit 100 and the reading device 200 together form a system for contactless data transmission. This data transmission can take place inductively or capacitively.

[0045] The reading device 200 transmits a signal containing clock information to the transponder unit 100 in a contactless manner. This signal can be, for example, a carrier signal. The commonly used clock frequency of the carrier signal in RFID systems is 13.56 MHz (according to ISO / IEC14443). This signal is received by the transponder unit 100 and forwarded to the clock generator 10 . This signal is optionally processed by clock generator 10 and forwarded again as a clock signal to modulator 20 . The modulator 20 uses the clock signal for the contactless transmission of modulated data to the reading device 200 .

[0046] In order to guarantee a stable clo...

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PUM

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Abstract

The invention relates to a transponder unit, system and method for contactless data transmission. A transponder unit (100) is provided for contactless transmission of modulated data to a reading device (200), having a function for generating a clock signal based on a signal received from said reading device (200) and synchronizing A clock generator (10), a modulator (20) synchronizing the clock signal in a mode, wherein the modulator (20) is configured to modulate data based on the clock signal of the clock generator (10), wherein The modulator (20) is designed to generate modulation pauses by masking at least one modulating part (11'), wherein the modulating part (11') is smaller than one modulating pulse (11) and the modulator is additionally controlled by It is configured to transmit a signal for activating the synchronization mode to the clock generator (10) during the modulation pause.

Description

technical field [0001] The invention relates to a transponder unit, system and method for contactless data transmission. Transponder units, also called transponders, are used for mobile data transmission, for example in chip cards, tags and devices. Together with the reading device, the transponder forms a system for contactless data transmission. Background technique [0002] A distinction is made between passive and active transponders. In the case of passive transponders, the energy supply and the data exchange between the transponder and the reader take place using magnetic or electromagnetic fields. In this case, the transponder absorbs the energy required for operation from the field of the reading device via the antenna. In contrast to this, active transponders have their own energy source, for example a battery. Active transponders can be modulated passively by means of load modulation or actively by means of a driver stage. [0003] In the case of contactless d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L7/00H04B1/59H04B5/48
CPCG06K19/0723H04B5/48H04L45/00H04L7/0331
Inventor M.布希斯鲍姆J.格鲁贝尔P.拉加姆
Owner INFINEON TECH AG