CN207573093U - A kind of NFC antenna electricity getting device - Google Patents
A kind of NFC antenna electricity getting device Download PDFInfo
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- CN207573093U CN207573093U CN201721597889.1U CN201721597889U CN207573093U CN 207573093 U CN207573093 U CN 207573093U CN 201721597889 U CN201721597889 U CN 201721597889U CN 207573093 U CN207573093 U CN 207573093U
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Abstract
The utility model belongs to the communications field, a kind of NFC antenna electricity getting device is disclosed, including antenna, rectification module, energy-storage module and current regulating module；The energy of electromagnetic field received is converted into first voltage by antenna, rectification module carries out rectification to obtain second voltage to first voltage, second voltage charges to energy-storage module by current regulating module, charging current is adjusted in current regulating module, when second voltage has the tendency that dying down due to electromagnetic field weakens, energy-storage module maintains power good by externally discharging, and ensures circuit normal work；Therefore the problem of overload during NFC device admission moment energy-storage module obtains excessive power so as to cause NFC is avoided while using larger capacity energy-storage module, so that NFC device can carry out normal communication, and then identified by NFC reader and keep steady operation.
Description
Technical field
The utility model belongs to the communications field more particularly to a kind of NFC antenna electricity getting device.
Background technology
In existing antenna electricity getting device, the energy of electromagnetic field received is converted into first voltage, rectification mould by antenna
Block carries out first voltage rectification to obtain second voltage, and second voltage directly charges to energy-storage module, works as second voltage
Less than energy-storage module voltage when, energy-storage module maintains power good by externally discharging, and ensures circuit normal work.
Since in existing antenna electricity getting device, when energy-storage module capacity is smaller, preferable filter effect can not be provided,
And when system load is heavier, energy-storage module can not provide larger moment output, lead to system job insecurity.In addition, work as
When not having NFC device in field, NFC reader is likely to be at intermittent inquiry state to reduce power consumption, and radiofrequency field cuts in and out,
Smaller energy-storage module cannot keep the power supply of long period, and the electricity before next radiofrequency field is established is caused just to exhaust.And
When energy-storage module capacity is larger, in the moment being put into NFC device in field, energy-storage module can obtain larger energy from field
Amount, makes the field load excessive of NFC reader, influences the normal communication of NFC device, even resulting in NFC device can not be read by NFC
Card device identifies so that system can not reliably working.
Therefore, existing antenna electricity getting device there are problems that when energy-storage module capacity is larger normal NFC communication can be influenced.
Utility model content
The utility model provides a kind of NFC antenna electricity getting device, it is intended to solve existing NFC antenna electricity getting device and exist
The problem of energy-storage module capacity can influence normal NFC communication when larger.
The utility model is realized in this way a kind of NFC antenna electricity getting device, the NFC antenna electricity getting device includes day
Line, rectification module, energy-storage module and current regulating module；
First feed end of the antenna is connect with the first input end of the rectification module, the second feed of the antenna
End is connect with the second input terminal of the rectification module, the output terminal of the rectification module and the first of the current regulating module
Input/output terminal connects, and the second input/output terminal of the current regulating module connects with the input/output terminal of the energy-storage module
It connects；
The energy of electromagnetic field received is converted into first voltage by the antenna, and the rectification module is to the first voltage
Rectification is carried out to obtain second voltage, the second voltage fills the energy-storage module by the current regulating module
Charging current is adjusted in electricity, the current regulating module, when the second voltage has what is died down to become due to electromagnetic field weakens
During gesture, the energy-storage module maintains power good by externally discharging, and ensures circuit normal work.
During being charged due to second voltage by current regulating module to energy-storage module, current regulating module pair
Charging current is adjusted, therefore avoids NFC device admission moment energy storage mould while using larger capacity energy-storage module
Block obtains excessive power so as to cause in NFC the problem of overload so that and NFC equipment can carry out normal communication, and then by
NFC reader identifies and keeps steady operation.
Description of the drawings
It is novel in order to illustrate more clearly of the technical application in the utility model embodiment, in being described below to embodiment
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only the one of the utility model
A little embodiments, for those of ordinary skill in the art, without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the overall architecture schematic diagram of NFC antenna electricity getting device that one embodiment of the utility model provides；
Fig. 2 is the modular structure schematic diagram of NFC antenna electricity getting device that one embodiment of the utility model provides；
Fig. 3 is the electrical block diagram of embodiment illustrated in fig. 2；
Fig. 4 is the modular structure schematic diagram of NFC antenna electricity getting device that one embodiment of the utility model provides；
Fig. 5 is the electrical block diagram of embodiment illustrated in fig. 4.
Specific embodiment
It is new to this practicality below in conjunction with attached drawing to make the purpose of this utility model, technical solution and advantage clearer
Type embodiment is described in further detail.
Fig. 1 shows the overall architecture of NFC antenna electricity getting device that one embodiment of the utility model provides, in order to just
In explanation, illustrate only with the relevant part of the utility model embodiment, details are as follows：
NFC antenna electricity getting device includes antenna 01, rectification module 02, energy-storage module 03 and current regulating module 04；
Wherein, the first feed end of antenna 01 is connect with the first input end of rectification module 02, the second feed of antenna 01
End is connect with the second input terminal of rectification module 02, and the output terminal of rectification module 02 and the first input of current regulating module 04 are defeated
Outlet connects, and the second input/output terminal of current regulating module 04 is connect with the input/output terminal of energy-storage module 03.
In above-mentioned NFC antenna electricity getting device, the energy of electromagnetic field received is converted into first voltage, rectification by antenna 01
Module 02 carries out first voltage rectification to obtain second voltage, and second voltage is by current regulating module 04 to energy-storage module 03
It charges, charging current is adjusted in current regulating module 04, when second voltage has what is died down to become due to electromagnetic field weakens
During gesture, energy-storage module 03 externally discharges to maintain power good, ensures circuit normal work.
When second voltage has the tendency that dying down due to electromagnetic field weakens, energy-storage module 03 externally discharges to maintain power supply steady
It is fixed to be specially：When second voltage is less than the voltage of energy-storage module 03, energy-storage module 03 externally discharges that NFC antenna is maintained to take electricity
The supplying power for outside of device is stablized.
During being charged due to second voltage by current regulating module 04 to energy-storage module 03, current regulation mould
Block 04 adjusts charging current, therefore avoids NFC device admission wink while using larger capacity energy-storage module 03
Between energy-storage module 03 obtain excessive power so as to cause in NFC the problem of overload so that NFC device can carry out positive normal open
Letter, and then identified by NFC reader and keep steady operation.
Specifically, there are two types of realization methods for NFC antenna electricity getting device.
The first realization method is as shown in Fig. 2, current regulating module 04 includes the first current limliting module 041 and one-way conduction mould
Block 042；
The input terminal of first current limliting module 041 and the output terminal of one-way conduction module 042 collectively form current regulating module
04 the first input/output terminal, the output terminal of the first current limliting module 041 and the input terminal of one-way conduction module 042 collectively form
Second input/output terminal of current regulating module 04；
Second voltage charges to energy-storage module 03 by current regulating module 04, and current regulating module 04 is to charging
Electric current is adjusted, when second voltage be less than energy-storage module 03 voltage when, energy-storage module 03 by current regulating module 04 into
Row discharges：
Second voltage charges to energy-storage module 03 by the first current limliting module 041, and the first current limliting module 041 is to filling
Electric current is adjusted, and when second voltage is less than the voltage of energy-storage module 03, energy-storage module 03 passes through one-way conduction module 042
It discharges.
When charging to energy-storage module 03, since the first current limliting module 041 adjusts charging current, therefore using compared with
NFC device admission moment energy-storage module 03 is avoided while large capacity energy-storage module 03 and obtains excessive power so as to cause NFC
In the problem of overload.
Fig. 3 shows the circuit structure of embodiment illustrated in fig. 2, for convenience of description, illustrates only and the utility model reality
The relevant part of example is applied, details are as follows：
First current limliting module 041 is first resistor R1.
The first end of first resistor R1 and the second end of first resistor R1 be respectively the first current limliting module 041 input terminal and
The output terminal of first current limliting module 041.
One-way conduction module 042 is the first diode D1.
The cathode of the anode of first diode D1 and the first diode D1 be respectively one-way conduction module 042 input terminal and
The output terminal of one-way conduction module 042.
Rectification module 02 includes the second diode D2, third diode D3, the 4th diode D4 and the 5th diode D5.
The anode of second diode D2 and the cathode of the 4th diode D4 collectively form the first input end of rectification module 02,
The anode of third diode D3 and the cathode of the 5th diode D5 collectively form the second input terminal of rectification module 02, the two or two pole
The cathode of pipe D2 and the cathode of third diode D3 collectively form the output terminal of rectification module 02, the anode of the 4th diode D4
With the anode of the 5th diode D5 with being connected to power supply altogether.
Energy-storage module 03 is the first capacitance C1.
The first end of first capacitance C1 is the input/output terminal of energy-storage module 03, and the second end of the first capacitance C1 is with power supply
Connection.
Circuit shown in Fig. 3 is described further below in conjunction with operation principle：
In specific implementation process, the energy of electromagnetic field received is converted into first voltage, the second diode by antenna 01
D2 to the 5th diode D5 carries out first voltage rectification to obtain second voltage, and second voltage is by first resistor R1 to first
Capacitance C1 charges, first resistor R1 charging current is adjusted (since first resistor R1 plays current-limiting resistance,
Therefore reduce charging current), when second voltage is less than the voltage of the first capacitance C1, the first capacitance C1 passes through the first diode D1
It discharges, to maintain power good and ensure that circuit works normally.
There are two shortcomings for above-mentioned realization method：
1) when charging to the first capacitance C1, with the raising of the first capacitance C1 both end voltages, flow through first resistor R1's
Charging current can be less and less so that charge rate is slack-off；
2) when the first capacitance C1 externally discharges, pressure drop can be generated on the first diode D1, influences power supply efficiency.
Therefore propose following second of realization method, solve above-mentioned two problems.
Second of realization method is as shown in figure 4, current regulating module 04 includes the second current limliting module 043, switching control mould
Block 044 and handover module 045；
The input terminal of second current limliting module 043, the first input/output terminal of handover module 045 and switching control module
044 input terminal collectively forms the first input/output terminal of current regulating module 04, the second input and output of handover module 045
Hold the second input/output terminal for current regulating module 04, the output terminal of switching control module 044 and the control of handover module 045
End connection, the output terminal of the second current limliting module 043 are connect with the input terminal of handover module 045.
Second voltage charges to energy-storage module 03 by current regulating module 04, and current regulating module 04 is to charging
Electric current is adjusted specially：
Second voltage charges to energy-storage module 03 by the second current limliting module 043, and switching control module 044 exports
Voltage is controlled, when handover module 045 judges that control voltage is more than voltage threshold, handover module 045 carries out cutting for charge tunnel
It changes so that second voltage directly charges to energy-storage module 03；
When second voltage is less than the voltage of energy-storage module 03, energy-storage module 03 is put by current regulating module 04
Electricity is specially：When second voltage is less than the voltage of energy-storage module 03, energy-storage module 03 is directly externally put by handover module 045
Electricity.
When charging to energy-storage module 03, since the second current limliting module 043 adjusts charging current, therefore using compared with
NFC device admission moment energy-storage module 03 is avoided during large capacity energy-storage module 03 and obtains excessive power so as to cause in NFC
The problem of overload so that NFC device can carry out normal communication, and then identified by NFC reader and keep steady operation.
Fig. 5 shows the circuit structure of embodiment illustrated in fig. 4, for convenience of description, illustrates only and the utility model reality
The relevant part of example is applied, details are as follows：
Second current limliting module 043 is second resistance R2.
The first end of second resistance R2 and the second end of second resistance R2 be respectively the second current limliting module 043 input terminal and
The output terminal of second current limliting module 043.
Switching control module 044 includes 3rd resistor R3 and the second capacitance C2.
Input terminal of the first end of 3rd resistor R3 for switching control module 044, the second end of 3rd resistor R3 and second
The first end of capacitance C2 collectively forms the output terminal of switching control module 044, and the second end of the second capacitance C2 with power supply connects
It connects.
Handover module 045 is analog switch U1.
The first input/output terminal B1 of the power end VCC and analog switch U1 of analog switch U1, which are collectively formed, to be cut
The first input/output terminal of block 045 is changed the mold, the input terminal B0 of analog switch U1 is the input terminal of handover module 045, simulation
Control terminals of the logic control end S of switching switch U1 for handover module 045, the second input/output terminal A of analog switch U1
For the second input/output terminal of handover module 045, the ground terminal of analog switch U1 with power supply is connect.
Rectification module 02 includes the second diode D2, third diode D3, the 4th diode D4 and the 5th diode D5.
The anode of second diode D2 and the cathode of the 4th diode D4 collectively form the first input end of rectification module 02,
The anode of third diode D3 and the cathode of the 5th diode D5 collectively form the second input terminal of rectification module 02, the two or two pole
The cathode of pipe D2 and the cathode of third diode D3 collectively form the output terminal of rectification module 02, the anode of the 4th diode D4
With the anode of the 5th diode D5 with being connected to power supply altogether.
Energy-storage module 03 is the first capacitance C1.
The first end of first capacitance C1 is the input/output terminal of energy-storage module 03, and the second end of the first capacitance C1 is with power supply
Connection.
Circuit shown in fig. 5 is described further below in conjunction with operation principle：
In specific implementation process, the energy of electromagnetic field received is converted into first voltage, the second diode by antenna 01
D2 to the 5th diode D5 carries out first voltage rectification to obtain second voltage, and the voltage on the second capacitance C2 is no more than at this time
Voltage threshold, the second input/output terminal A of the input terminal B0 and analog switch U1 of analog switch U1 are connect, and second
Voltage charges to the first capacitance C1 by second resistance R2, when the voltage on the second capacitance C2 is more than voltage threshold, mould
Intend the switching that switching switch U1 carries out charge tunnel, the first input/output terminal B1 and analog switch of analog switch U1
The second input/output terminal A connections of U1, so that second voltage directly charges to the first capacitance C1, improve charge rate；
When second voltage is less than the voltage of the first capacitance C1, the first capacitance C1 is discharged by analog switch U1, to maintain
Power good simultaneously ensures that circuit works normally, while will not generate additional pressure drop.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (10)
1. a kind of NFC antenna electricity getting device, which is characterized in that the NFC antenna electricity getting device includes antenna, rectification module, storage
It can module and current regulating module；
First feed end of the antenna is connect with the first input end of the rectification module, the second feed end of the antenna with
The second input terminal connection of the rectification module, the output terminal of the rectification module and the first input of the current regulating module
Output terminal connects, and the second input/output terminal of the current regulating module is connect with the input/output terminal of the energy-storage module；
The energy of electromagnetic field received is converted into first voltage by the antenna, and the rectification module carries out the first voltage
Rectification is to obtain second voltage, and the second voltage charges to the energy-storage module by the current regulating module, institute
Current regulating module is stated charging current is adjusted, when the second voltage has the tendency that dying down due to electromagnetic field weakens,
The energy-storage module maintains power good by externally discharging, and ensures circuit normal work.
2. NFC antenna electricity getting device as described in claim 1, which is characterized in that the current regulating module includes the first limit
Flow module and one-way conduction module；
The input terminal of the first current limliting module and the output terminal of the one-way conduction module collectively form the current regulation mould
The input terminal of first input/output terminal of block, the output terminal of the first current limliting module and the one-way conduction module collectively forms
Second input/output terminal of the current regulating module；
The second voltage charges to the energy-storage module by the first current limliting module, and the first current limliting module is to filling
Electric current is adjusted, and when second voltage is less than the voltage of the energy-storage module, the energy-storage module is unidirectionally led by described
Logical module is discharged.
3. NFC antenna electricity getting device as claimed in claim 2, which is characterized in that the first current limliting module is first resistor；
The second end of the first end of the first resistor and the first resistor is respectively the input terminal of the first current limliting module
With the output terminal of the first current limliting module.
4. NFC antenna electricity getting device as claimed in claim 2, which is characterized in that the one-way conduction module is the one or two pole
Pipe；
The cathode of the anode of first diode and first diode is respectively the input terminal of the one-way conduction module
With the output terminal of the one-way conduction module.
5. NFC antenna electricity getting device as described in claim 1, which is characterized in that the current regulating module includes the second limit
Flow module, switching control module and handover module；
The input terminal of the second current limliting module, the first input/output terminal of the handover module and the switching control module
Input terminal collectively form the first input/output terminal of the current regulating module, the second input/output terminal of the handover module
For the second input/output terminal of the current regulating module, the output terminal of the switching control module and the control of the handover module
End connection processed, the output terminal of the second current limliting module are connect with the input terminal of the handover module；
The second voltage charges to the energy-storage module by the second current limliting module, and the switching control module is defeated
Go out to control voltage, when the handover module judges that control voltage is more than voltage threshold, the handover module carries out charge tunnel
Switching so that the second voltage directly to the energy-storage module charge；
When the second voltage is less than the voltage of the energy-storage module, the energy-storage module is directly right by the handover module
Outer electric discharge.
6. NFC antenna electricity getting device as claimed in claim 5, which is characterized in that the second current limliting module is second resistance；
The second end of the first end of the second resistance and the second resistance is respectively the input terminal of the second current limliting module
With the output terminal of the second current limliting module.
7. NFC antenna electricity getting device as claimed in claim 5, which is characterized in that switching control module include 3rd resistor and
Second capacitance；
The first end of the 3rd resistor is the input terminal of the switching control module, the second end of the 3rd resistor and described
The first end of second capacitance collectively forms the output terminal of the switching control module, and the second end of second capacitance is with power supply
Connection.
8. NFC antenna electricity getting device as claimed in claim 5, which is characterized in that the handover module is analog switch；
First input/output terminal of the power end of the analog switch and the analog switch collectively forms described cut
Change the mold the first input/output terminal of block, the input terminal of the analog switch is the input terminal of the handover module, the mould
Intend control terminal of the logic control end for the handover module of switching switch, the second input/output terminal of the analog switch
For the second input/output terminal of the handover module, the ground terminal of the analog switch with power supply is connect.
9. NFC antenna electricity getting device as described in claim 1, which is characterized in that the rectification module include the second diode,
Third diode, the 4th diode and the 5th diode；
The cathode of the anode of second diode and the 4th diode collectively forms the first input of the rectification module
The cathode of end, the anode of the third diode and the 5th diode collectively forms the second input of the rectification module
The cathode of end, the cathode of second diode and the third diode collectively forms the output terminal of the rectification module, institute
State the 4th diode anode and the 5th diode anode with being connected to power supply altogether.
10. NFC antenna electricity getting device as described in claim 1, which is characterized in that the energy-storage module is the first capacitance；
Input/output terminal of the first end of first capacitance for the energy-storage module, the second end and power supply of first capacitance
Ground connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721597889.1U CN207573093U (en) | 2017-11-24 | 2017-11-24 | A kind of NFC antenna electricity getting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721597889.1U CN207573093U (en) | 2017-11-24 | 2017-11-24 | A kind of NFC antenna electricity getting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207573093U true CN207573093U (en) | 2018-07-03 |
Family
ID=62692106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721597889.1U Withdrawn - After Issue CN207573093U (en) | 2017-11-24 | 2017-11-24 | A kind of NFC antenna electricity getting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207573093U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107872101A (en) * | 2017-11-24 | 2018-04-03 | 深圳市文鼎创数据科技有限公司 | A kind of NFC antenna electricity getting device |
-
2017
- 2017-11-24 CN CN201721597889.1U patent/CN207573093U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107872101A (en) * | 2017-11-24 | 2018-04-03 | 深圳市文鼎创数据科技有限公司 | A kind of NFC antenna electricity getting device |
| WO2019100744A1 (en) * | 2017-11-24 | 2019-05-31 | 深圳市文鼎创数据科技有限公司 | Nfc antenna powering device |
| CN107872101B (en) * | 2017-11-24 | 2019-11-15 | 深圳市文鼎创数据科技有限公司 | A kind of NFC antenna electricity getting device |
| US10826333B2 (en) | 2017-11-24 | 2020-11-03 | Excelsecu Data Technology Co., Ltd | NFC antenna power taking device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180703 Effective date of abandoning: 20191115 |