CN203179066U - NFC tag and NFC electronic equipment - Google Patents
NFC tag and NFC electronic equipment Download PDFInfo
- Publication number
- CN203179066U CN203179066U CN 201320123176 CN201320123176U CN203179066U CN 203179066 U CN203179066 U CN 203179066U CN 201320123176 CN201320123176 CN 201320123176 CN 201320123176 U CN201320123176 U CN 201320123176U CN 203179066 U CN203179066 U CN 203179066U
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- nfc
- voltage
- conversion circuit
- voltage conversion
- electronic equipment
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Abstract
The utility model provides an NFC tag and NFC electronic equipment. The NFC tag comprises two serially connected depletion mode N-channel MOSFETs and a voltage conversion circuit used for converting the voltage of a power supply battery. After being serially connected with each other, the two depletion mode N-channel MOSFETs are connected in parallel between the two connecting wires of an NFC antenna and an NFC chip. The input end of a voltage conversion circuit is connected with the power supply battery. The output end of the voltage conversion circuit is connected with the grids of the two depletion mode N-channel MOSFETs. When the power supply battery is full of electric power, the output voltage of the voltage conversion circuit enables the disconnection states of both the drain electrodes and the source electrodes of the two depletion mode N-channel MOSFETs. When the power supply battery is short of electric power, the output voltage of the voltage conversion circuit enables the connection states of both the drain electrodes and the source electrodes of the two depletion mode N-channel MOSFETs. In this way, due to the adoption of the NFC tag and the NFC electronic equipment, when the power supply battery is short of electric power, the NFC tag is closed so as to disable the perception of the NFC electronic equipment. Therefore, the error prompt generated due to the depletion of the electric power of the battery can be eliminated.
Description
Technical field
The utility model relates to wireless communication technology field, relates in particular to a kind of NFC label and a kind of NFC electronic equipment.
Background technology
The NFC(near-field communication) in the life that is applied in people that technology is more and more common.The smart mobile phone of main flow mostly possesses the NFC function of reading at present, and its accessory comparatively bluetooth earphone of middle and high end has also possessed the NFC technology.
The application of NFC in bluetooth earphone be enable bluetooth earphone and and mobile phone match fast.Its application scenarios is: the bluetooth earphone that has the mobile phone of NFC function and have a NFC function near the time, bluetooth earphone Auto Power On and match with mobile phone.The implementation method of this function is the inner integrated passive NFC label (comprising NFC antenna and NFC chip) of bluetooth earphone, when mobile phone when this NFC label, the NFC label is coupled out the voltage signal of a higher level, this signal can enable the power supply of bluetooth earphone, and can allow bluetooth earphone do corresponding operation.
Yet, please refer to Fig. 1, possess the NFC label construction of the bluetooth earphone inside of NFC function at present, its NFC antenna 1 directly links to each other with NFC chip 2.When its battery electric quantity exhausts, have the mobile phone of NFC near this bluetooth earphone, this bluetooth earphone can not done any action.But because the NFC label of this bluetooth earphone is still worked, so still have the prompting of finding this bluetooth earphone on the mobile phone, under this kind situation, can cause puzzlement to the user, the miscue of NFC is namely arranged on the mobile phone, but bluetooth earphone not done the action of anticipation.
Therefore, need a kind of NFC label and a kind of NFC electronic equipment, when the electric device battery electric weight was low, the NFC label was inoperative, and induction is less than this electronic equipment; When battery electric quantity can make the electronic equipment operate as normal, the NFC label normally used.
The utility model content
The purpose of this utility model is to provide a kind of NFC label and a kind of NFC electronic equipment, exhausts the miscue that produces because of battery electric quantity in the time of can eliminating present NFC electronic equipment and use, and improves user's experience.
For addressing the above problem, the utility model provides a kind of NFC label, comprises NFC antenna and NFC chip, and described NFC chip directly is connected with described NFC antenna by two connecting lines; Described NFC label comprises that also the depletion type N-channel MOS FET and of two series connection is used for the voltage conversion circuit of conversion supplying cell voltage; Be attempted by between described two connecting lines after described two depletion type N-channel MOS FET series connection; The input end of described voltage conversion circuit connects described supplying cell, output terminal connects the grid of described two depletion type N-channel MOS FET, and when described supplying cell electric weight is sufficient, the voltage of described voltage conversion circuit output makes drain electrode and the source electrode of two depletion type N-channel MOS FET be in cut-off state, when the supplying cell electric weight was not enough, the output voltage of described voltage conversion circuit made drain electrode and the source electrode of two depletion type N-channel MOS FET be in conducting state.
Further, described supplying cell is the lithium battery of 3.0V～4.2V.
Further, described voltage conversion circuit comprises negative voltage charge pump or discrete device.
Further, the voltage of described voltage conversion circuit output when described supplying cell electric weight is sufficient is the negative voltage of absolute value more than 10V.
The utility model also provides a kind of NFC electronic equipment, comprises one of above-mentioned NFC label.
Further, described NFC electronic equipment is bluetooth earphone, smart mobile phone or panel computer.
Compared with prior art, the NFC label that the utility model provides and NFC electronic equipment, described NFC label comprise that the depletion type N-channel MOS FET and of two series connection is used for the voltage conversion circuit of conversion supplying cell E voltage; Be attempted by between described two connecting lines after described two depletion type N-channel MOS FET series connection; The input end of described voltage conversion circuit connects described supplying cell, output terminal connects the grid of described two depletion type N-channel MOS FET, and when described supplying cell electric weight is sufficient, the voltage of described voltage conversion circuit output makes drain electrode and the source electrode of two depletion type N-channel MOS FET be in cut-off state, when battery electric quantity was not enough, the output voltage of described voltage conversion circuit made drain electrode and the source electrode of two depletion type N-channel MOS FET be in conducting state; Therefore, the NFC label that the utility model provides and NFC electronic equipment, when the supplying cell electric weight was low, the NFC label was closed, and sensing is less than this NFC electronic equipment; When the supplying cell electric weight can make NFC electronic equipment operate as normal, the NFC label normally used, thereby exhausted the miscue that produces because of battery electric quantity when having eliminated present NFC electronic equipment and using, and had improved user's experience.
Description of drawings
Fig. 1 is the structural representation of NFC label of the prior art;
Fig. 2 is the structural representation of the NFC label of the utility model specific embodiment;
Fig. 3 is the voltage transitions synoptic diagram of the voltage conversion circuit of the utility model specific embodiment.
Embodiment
Core concept of the present utility model is depletion type N-channel MOS FET and the voltage conversion circuit that has increased by two series connection at NFC chip and NFC antenna, namely is attempted by between described two connecting lines after described two depletion type N-channel MOS FET M1, the M2 series connection; The input end of described voltage conversion circuit 3 connects described supplying cell E, output terminal connects the grid of described two depletion type N-channel MOS FET M1, M2, and when described supplying cell electric weight is sufficient, the voltage of described voltage conversion circuit output makes drain electrode and the source electrode of two depletion type N-channel MOS FET M1, M2 be in cut-off state, when the supplying cell electric weight was not enough, the output voltage of described voltage conversion circuit made drain electrode and the source electrode of two depletion type N-channel MOS FET M1, M2 be in conducting state.
For the purpose of this utility model, feature are become apparent, below in conjunction with accompanying drawing embodiment of the present utility model is further described, yet the utility model can be realized with different forms, should not think just to be confined to described embodiment.
Please refer to Fig. 2, the utility model provides a kind of NFC label, comprises NFC antenna 1 and NFC chip 2, and described NFC chip 2 directly is connected with described NFC antenna 1 by two connecting lines (not indicating); Described NFC label comprises that also depletion type N-channel MOS FET M1, the M2 and one of two series connection are used for the voltage conversion circuit 3 of conversion supplying cell E voltage; Be attempted by between described two connecting lines after described two depletion type N-channel MOS FET M1, the M2 series connection; The input end of described voltage conversion circuit 3 connects described supplying cell E, and output terminal connects the grid of described two depletion type N-channel MOS FET M1, M2.
Wherein, described voltage conversion circuit 3 can be any can with the voltage transitions of supplying cell E for can with the drain electrode of two depletion type N-channel MOS FET M1, M2 of series connection and source electrode by or the circuit structure of the output voltage of conducting, in the present embodiment, described supplying cell E is lithium battery, and normal output voltage is 3.0V～4.2V; Described voltage conversion circuit 3 is that (3.0V～4.2V) is transformed into the circuit structure of the negative voltage of absolute value more than 10V, and this circuit structure can be formed by the negative voltage charge pump conversion, also can be formed by connecting by discrete device with lithium battery voltage.
Please refer to Fig. 3, Fig. 3 is-the voltage transitions example of 10V voltage conversion circuit.Voltage conversion circuit 3 comprises boost DC-DC control circuit 31 and negative voltage charge pump 32.Boost DC-DC control circuit 31 can be made up of TPS61222 chip and peripheral circuit thereof, its objective is that the voltage 3.0V～4.2V with lithium battery (being supplying cell E) output converts 5V voltage to.Negative voltage charge pump 32 can be made up of reversed charge pump chip LM2682 and peripheral circuit thereof, and its function is the 5V voltage transitions one-tenth-10V voltage output with input.The principle of work of the voltage transitions of voltage conversion circuit is when the lithium battery electric weight is more (the li-ion cell protection plate is not protected); the lithium battery output voltage is 3.0V～4.2V; correspondingly, boost DC-DC control circuit 31 is output as 5V voltage, and negative voltage charge pump 32 is output as-10V voltage.When the lithium battery electric weight was low, battery protecting plate carried out low-voltage variation to lithium battery electric core, and the lithium battery output voltage is 0V, and correspondingly, boost DC-DC control circuit 31 and charge pump 32 all output voltage are 0V.
Because the output voltage of voltage conversion circuit 3 can directly be controlled the grid voltage of two depletion type N-channel MOS FETM1, M2, and when the electric weight of described supplying cell E is sufficient, described voltage conversion circuit 3 is with the voltage transitions one-tenth-10V voltage output (or the higher negative voltage of absolute value) of supplying cell, thereby make drain electrode and the source electrode of two depletion type N-channel MOS FET M1, M2 be in cut-off state, this situation is equivalent to depletion type N-channel MOS FET M1, M2 and does not exist, and the NFC function of the electronic equipment at NFC label place is normally used; When the electric weight of supplying cell E is not enough, the output voltage of described voltage conversion circuit is 0, the grid voltage of two depletion type N-channel MOS FET M1, M2 also is 0, make drain electrode and the source electrode of two depletion type N-channel MOS FET M1, M2 be in the low-resistance conducting state, this situation is equivalent to 1 short circuit of NFC antenna, NFC label inoperative (perhaps be interpreted as NFC function close), so with regard to sensing less than this NFC electronic equipment.
Need to prove that supplying cell electric weight abundance refers to that the present electric weight of supplying cell can be kept the NFC electronic equipment at NFC label place can operate as normal, namely the current output voltage of supplying cell is in the normal output voltage range of this supplying cell; Supplying cell electric weight deficiency refers to that the electric weight of supplying cell is about to exhaust or exhaust, present remaining electric weight can't have been kept the NFC electronic equipment at NFC label place can operate as normal, the NFC electronic equipment can't respond various instruction operations, and namely the current output voltage of supplying cell has been lower than the normal output voltage range of this supplying cell.Be that example illustrates effect of the present utility model with mobile phone and bluetooth earphone (containing NFC label of the present utility model) below.
With NFC tag application of the present utility model after on the bluetooth earphone, when the supplying cell voltage of bluetooth earphone is exported just often, described voltage conversion circuit is with the voltage transitions one-tenth-10V voltage output of lithium battery, thereby make drain electrode and the source electrode of two depletion type N-channel MOS FET M1, M2 be in cut-off state, this situation is equivalent to depletion type N-channel MOS FET M1, M2 and does not exist, and mobile phone and bluetooth earphone can well use the NFC label to communicate.When the supplying cell electric weight of bluetooth earphone exhausts, the output voltage of described voltage conversion circuit is 0, two depletion type N-channel MOS FET M1, the grid voltage of M2 also is 0, make two depletion type N-channel MOS FET M1, the drain electrode of M2 and source electrode are in the low-resistance conducting state, this situation is equivalent to the NFC antenna short circuit, the NFC label of bluetooth earphone inside is inoperative, the mobile phone sensing is less than bluetooth earphone, thereby do not have any miscue on the mobile phone, thereby NFC label of the present utility model exhausts the error situation that the mobile phone that produces shows NFC pairing failure because of the supplying cell electric weight can eliminate present NFC bluetooth earphone and use the time, improves user's experience.
Thus, the utility model also provides a kind of NFC electronic equipment, comprises above-mentioned NFC label, and described NFC electronic equipment can be electronic equipments such as bluetooth earphone, smart mobile phone, panel computer.
In sum, the NFC label that the utility model provides and NFC electronic equipment, described NFC label comprise that the depletion type N-channel MOS FET and of two series connection is used for the voltage conversion circuit of conversion supplying cell E voltage; Be attempted by between described two connecting lines after described two depletion type N-channel MOS FET series connection; The input end of described voltage conversion circuit connects described supplying cell, output terminal connects the grid of described two depletion type N-channel MOS FET, and when described supplying cell electric weight is sufficient, the voltage of described voltage conversion circuit output makes drain electrode and the source electrode of two depletion type N-channel MOS FET be in cut-off state, when battery electric quantity was not enough, the output voltage of described voltage conversion circuit made drain electrode and the source electrode of two depletion type N-channel MOS FET be in conducting state; Therefore, the NFC label that the utility model provides and NFC electronic equipment, when the supplying cell electric weight was low, the NFC label was closed, and sensing is less than this NFC electronic equipment; When the supplying cell electric weight can make NFC electronic equipment operate as normal, the NFC label normally used, thereby exhausted the miscue that produces because of battery electric quantity when having eliminated present NFC electronic equipment and using, and had improved user's experience.
Obviously, those skilled in the art can carry out various changes and modification to utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (5)
1. a NFC label comprises NFC antenna and NFC chip, and described NFC chip directly is connected with described NFC antenna by two connecting lines; It is characterized in that described NFC label comprises that also the depletion type N-channel MOS FET and of two series connection is used for the voltage conversion circuit of conversion supplying cell voltage; Be attempted by between described two connecting lines after described two depletion type N-channel MOS FET series connection; The input end of described voltage conversion circuit connects described supplying cell, output terminal connects the grid of described two depletion type N-channel MOS FET, and when described supplying cell electric weight is sufficient, the output voltage of described voltage conversion circuit makes drain electrode and the source electrode of two depletion type N-channel MOS FET be in cut-off state, when the supplying cell electric weight was not enough, the output voltage of described voltage conversion circuit made drain electrode and the source electrode of two depletion type N-channel MOS FET be in conducting state.
2. NFC label as claimed in claim 1 is characterized in that, described supplying cell is the lithium battery of 3.0V～4.2V.
3. NFC label as claimed in claim 1 is characterized in that, described voltage conversion circuit comprises negative voltage charge pump or discrete device.
4. a NFC electronic equipment is characterized in that, comprises each described NFC label in the claim 1 to 3.
5. NFC electronic equipment as claimed in claim 4 is characterized in that, described electronic equipment is bluetooth earphone, smart mobile phone or panel computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320123176 CN203179066U (en) | 2013-03-18 | 2013-03-18 | NFC tag and NFC electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320123176 CN203179066U (en) | 2013-03-18 | 2013-03-18 | NFC tag and NFC electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203179066U true CN203179066U (en) | 2013-09-04 |
Family
ID=49075735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320123176 Withdrawn - After Issue CN203179066U (en) | 2013-03-18 | 2013-03-18 | NFC tag and NFC electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203179066U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103226724A (en) * | 2013-03-18 | 2013-07-31 | 青岛歌尔声学科技有限公司 | NFC (Near Field Communication) label and NFC electronic equipment |
-
2013
- 2013-03-18 CN CN 201320123176 patent/CN203179066U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103226724A (en) * | 2013-03-18 | 2013-07-31 | 青岛歌尔声学科技有限公司 | NFC (Near Field Communication) label and NFC electronic equipment |
| CN103226724B (en) * | 2013-03-18 | 2016-02-03 | 青岛歌尔声学科技有限公司 | A kind of NFC label and a kind of NFC electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130904 Effective date of abandoning: 20160203 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |