Apparatus applied for detection and transmission of low frequency signal

By integrating the magnetic induction module and the low-frequency signal processing module on the card, the problem of implementing the low-frequency signal detection and transmission system on the card is solved, the accuracy of distance detection and control is improved, and the short-range communication function of the mobile phone is realized.

Inactive Publication Date: 2012-02-01
NATIONZ TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different internal structures of different mobile phones, there are great differences in the radio frequency signal transmission effect. The radio frequency SIM / TF card radio frequency communication distance of a mobile phone with strong transmission may reach a distance of several meters, and the radio frequency SIM / TF card communication distance of a mobile phone with weak transmission The distance can also reach tens of centimeters

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0035] figure 1 It is a structural diagram of a magnetic induction module and a low-frequency signal processing module in Embodiment 1 of the present invention, which includes a magnetic induction module 100 and a low-frequency signal processing module 10. The low-frequency signal processing module 10 also includes a low-pass filter module 104, an amplifier 101, The digital / analog converter 102, the digital / analog converter 105 and the comparator 103, the comparator 106, the magnetic induction module 100, the low-pass filter module 104, and the amplifier 101 are connected in sequence. The output terminals of the amplifier 101 are connected to the comparator 103 and the comparator respectively. The positive input terminal of the digital / analog converter 106 is connected, and the digital / analog converter 102, the digital / analog converter 105, the comparator 103, and the comparator 106 form two channels. In each channel, the output terminal of the digital / analog converter is connect...

Embodiment approach 2

[0041] Image 6 It is a structural diagram of the magnetic induction module and the low-frequency signal processing module in the second embodiment of the present invention, which includes a magnetic induction module 100 and a low-frequency signal processing module 10. The low-frequency signal processing module 10 also includes a low-pass filter module 104, an amplifier 101, and digital / analog The converter 102 and the comparator 103, the magnetic induction module 100, the low-pass filter module 104, and the amplifier 101 are connected in sequence, the output terminal of the amplifier 101 is connected with the positive input terminal of the comparator 103, and the output terminal of the digital / analog converter 102 is connected with The inverting input terminal of the comparator 103 is connected. Among them, the amplifier 101 may be a double-ended input single-ended output amplifier or a differential amplifier. The amplifier 101 pre-amplifies the input weak signal, and the digi...

Embodiment approach 3

[0044] Figure 7 This is a structural diagram of the magnetic induction module and the low-frequency signal processing module in Embodiment 3 of the present invention, which includes the magnetic induction module 100 and the low-frequency signal processing module 10. The low-frequency signal processing module 10 also includes a low-pass filter module 104, an amplifier 201, and There are two digital / analog converters 202, 203, 204 and six comparators 205, 206, 207. The output terminal of the amplifier 201 is connected to the positive input terminals of the six comparators 205, 206, and 207 respectively. The converters 202, 203, 204 and the six comparators 205, 206, and 207 form six channels. The output terminal of the digital / analog converter in each channel is connected to the reverse input terminal of the comparator. Each upper and lower channel forms a pair, a total of Three pairs. Among them, the amplifier 101 may be a double-ended input single-ended output amplifier or a di...

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Abstract

The invention, which is applied to the near field communication field, relates to an apparatus applied for detection and transmission of a low frequency signal. The apparatus comprises: a printed circuit board (PCB); a magnetic induction module, which is integrated on the PCB and is used for inducting a low frequency magnetic field signal; and a low frequency signal processing module, which is used for carrying out detection on a low frequency signal. And the magnetic induction module is connected with the low frequency signal processing module. besides, the PCB can be a PCB of a subscriber identity module (SIM) card, a PCB of a Micro-SIM card, a PCB of a TF card, a PCB of an SD card or a PCB of a UIM card and the like. According to the invention, detection and transmission functions for low frequency signals of various memory cards installed on mobile phones are realized, wherein the memory cards include an SIM card, a TF card, an SD card, a UIM card and the like.

Description

Technical field [0001] The present invention relates to the field of communications, in particular to a device for low-frequency signal detection and transmission. Background technique [0002] Nowadays, it has appeared to add radio frequency function to SIM (Subscriber Identity Module) card in mobile phone (called radio frequency SIM card) or add radio frequency function to TF (T-Flash, also known as MicroSD) card in mobile phone. (Called radio frequency TF card) or add a short-distance communication module on the mainboard of the mobile phone to realize the method of short-distance communication of the mobile phone. The emergence of this method makes the mobile phone a super smart terminal that can be used for recharge, consumption, transaction and identity authentication. Dadi meets the urgent needs of the market. [0003] Among them, the RF SIM / TF-based short-distance mobile phone solution has attracted wide attention due to its advantages such as simplicity and no need to cha...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H04B17/00H04B5/00H03F3/45
CPCH04B5/00H03F3/45H04B5/0075H04B17/00H04B5/24G06K19/07749G06K19/07783H01Q7/00
OwnerNATIONZ TECH INC