CN208402138U - A kind of NFC device - Google Patents
A kind of NFC device Download PDFInfo
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- CN208402138U CN208402138U CN201820840459.6U CN201820840459U CN208402138U CN 208402138 U CN208402138 U CN 208402138U CN 201820840459 U CN201820840459 U CN 201820840459U CN 208402138 U CN208402138 U CN 208402138U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The utility model discloses a kind of NFC devices, and including the Anneta module and first control unit, the second control unit, first switch unit and control module for coupling with reading equipment, first switch unit is connected between power supply and load；The input terminal of first control unit is connected to Anneta module, and controls first switch unit with the duration that equipment couples is read according to Anneta module；Second control unit is connected between control module and first switch unit, and control module is also attached to Anneta module；Control module controls the second control unit according to the duration of antenna module couples, so that the second control unit controls first switch unit；First switch unit is used to that the connection of power supply and load to be connected to or disconnected according to the control of first control unit, the second control unit.The control logic of NFC device switching on and shutting down is enriched, shutdown can be achieved as desired by, can satisfy the low-power consumption requirement of NFC device.
Description
Technical field
The utility model relates to near-field communication field more particularly to a kind of NFC devices.
Background technique
Wireless near field communication (Near Field Communication, NFC) technology is from radio frequency identification (RFID) skill
A kind of short distance high frequency wireless communication technology that art grows up.Compared with infrared communication, Bluetooth communication, NFC is taken solely
Special signal attenuation technique, it is thus possible to be communicated in very short distance (such as 10cm).NFC is due to communication distance is short
Natively there is safety, be very suitable for the applications such as identification, secure payment.
Currently, with NFC function electronic product it is more more and more universal, and this kind of product booting when, usually can be by outer
Portion NFC reads the radio frequency signal that equipment is sent and is triggered, for example, reading equipment to the electricity with NFC function from external NFC
Sub- product sends NFC request signal, the touching as defined in system after receiving the NFC request signal of the electronic product with NFC function
It completes to power on booting in the hair time, can further be communicated with external NFC devices.
But since the electronic product with NFC function is generally powered by battery, only power on this kind of control that is switched on
Logic processed is not able to satisfy the low-power consumption requirement of NFC device；Such as when the electronic product with NFC function is placed on for a long time
NFC reads the reading area of equipment, reads in equipment as user forgets NFC smart card in NFC, NFC reads equipment at this time
It will make this electronic product upper electricity operation for a long time, the cruise duration of electronic product can be reduced even with the service life.
Utility model content
For overcome the deficiencies in the prior art, it the purpose of this utility model is to provide a kind of NFC device, can solve existing
Some NFC devices are generally powered by battery, therefore only power on this kind of control logic that is switched on, and are not able to satisfy NFC device
Low-power consumption requirement, the problem of cruise duration of electronic product may be reduced even with the service life.
The purpose of this utility model adopts the following technical scheme that realization:
A kind of NFC device, including the Anneta module and first control unit, the second control for being coupled with reading equipment
Unit, first switch unit and control module processed, the first switch unit are connected between power supply and load；
The input terminal of the first control unit is connected to the Anneta module, and is set according to the Anneta module with reading
The duration of standby coupling controls the first switch unit；
Second control unit is connected between the control module and first switch unit, and the control module also connects
It is connected to the Anneta module；The control module controls second control unit according to the duration of the antenna module couples,
So that second control unit controls the first switch unit；
The first switch unit is used to be connected to or be disconnected according to the control of the first control unit, the second control unit
The connection of power supply and load.
Further, the Anneta module includes antenna and rectifier, what the rectifier was used to obtain on the antenna
Energy is converted to direct current, and the output of the rectifier is connected to the first control unit and control module.
Further, the first switch unit includes the first controlled end, first into electric end and the first current output terminal, and described the
One is used to be connected to power supply into electric end；First current output terminal is connected to the control module, and first controlled end is connected to
The first control unit and the second control unit.
Further, the first switch unit includes first resistor, and one end of the first resistor is connected to described
One controlled end, the other end are connected to described first into electric end.
Further, first controlled end and first into the voltage between electric end be greater than the first conducting voltage when, it is described
First is connected into electric end and the first current output terminal.
Further, when the duration of the antenna module couples is less than the first shear duration, the first control unit is defeated
Outlet and described first is greater than the first conducting voltage into the voltage between electric end；
When the duration of the antenna module couples reaches the first shear duration, the first control unit output end and first
It is not more than the first conducting voltage into the voltage between electric end.
Further, the first control unit includes first capacitor and second switch unit, the second switch unit
It is connected to first controlled end into electric end into electric end and the second current output terminal, described second including the second controlled end, second, it is described
Second current output terminal is connected to low level；One end of the first capacitor is connected to second controlled end, and the other end is connected to institute
State Anneta module；
The first control unit further includes second resistance, and second controlled end is connected to low by the second resistance
Level.
Further, second control unit includes third controlled end, third into electric end and third current output terminal, and described
Three are connected to first controlled end into electric end, and the third current output terminal is connected to low level, and the third controlled end is connected to
The control module；
The control module is used to control the third by the third controlled end and be connected into electric end and third current output terminal
Or it disconnects.
Further, the control module is used to control the third by the third controlled end goes out into electric end and third
Electric end is turned on or off, and specifically includes at least one of following:
If the control module monitors that the duration of the antenna module couples reaches preparation duration, pass through the third
Controlled end controls the third and is connected into electric end and third current output terminal；
If the control module monitors that the duration of the antenna module couples reaches the duration that transfinites, pass through the third
Controlled end controls the third and disconnects into electric end and third current output terminal.
Further, the control module is also used to communicate by the Anneta module with equipment is read, if the control
The duration of module monitors to the antenna module couples reaches the duration that transfinites, then controls the third by the third controlled end
It is disconnected into electric end and third current output terminal, specifically:
If the control module terminates after communicating with reading equipment, monitor that the duration of the antenna module couples reaches super
Limit then controls the third by the third controlled end and disconnects into electric end and third current output terminal.
Further, the NFC device further includes third control unit, and the third control unit includes key and delay
Unit, one end of the key are connected to low level, and the other end is connected to the delay unit, the output end of the delay unit
It is connected to the first switch unit.
Further, when the duration that the key is pressed is less than the second shear duration, the third control unit output
End and first is greater than the first conducting voltage into the voltage between electric end；
When the duration that the key is pressed reaches the second shear duration, the third control unit output end and first into
Voltage between electric end is not more than the first conducting voltage.
Further, the delay unit includes the second capacitor and 3rd resistor, second capacitor and third in parallel
One end of resistance is connected to the key, and the other end is connected to the first switch unit.
Further, the NFC device further includes under-voltage protection unit, and the input terminal of the under-voltage protection unit connects
It is connected to first current output terminal, output end is connected to the third controlled end；The under-voltage protection unit is described for detecting
The voltage of first current output terminal is controlled when the voltage of first current output terminal is lower than predeterminated voltage by the third controlled end
The third is disconnected into electric end and third current output terminal.
Compared with prior art, the beneficial effect of the utility model embodiment is: being controlled by first control unit and second
Unit processed controls the first switch unit for being connected to or disconnecting power supply and control module simultaneously, and first control unit is used for basis
Anneta module controls the first switch unit with the duration that equipment couples is read, and control module passes through the second control according to the duration
Unit processed controls the first switch unit；To enrich the control logic of NFC device switching on and shutting down, can be achieved as desired by
Shutdown, can satisfy the low-power consumption requirement of NFC device.
Detailed description of the invention
Fig. 1 provides the structural schematic diagram of NFC device for the utility model embodiment；
Fig. 2 is the circuit diagram of NFC device in Fig. 1；
Fig. 3 is another circuit diagram of NFC device in Fig. 1.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the utility model, it should be noted that
Under the premise of not colliding, it can be formed in any combination between various embodiments described below or between each technical characteristic new
Embodiment.
Such as the structural schematic diagram that Fig. 1 is a kind of NFC device.NFC device includes the antenna mould for coupling with reading equipment
Block 110 and first control unit 120, the second control unit Q3, first switch unit Q1 and control module MCU；First switch
Unit Q1 is connected between power supply and load.NFC device for example can be used for contact type intelligent card in the utility model, certainly
It is not limited to this.Load may include electricity consumption module inside NFC device and/or the external electricity consumption module of NFC device, such as control
The input modules such as device, display and key processed；Control module MCU can also be used as load and be connected to first switch unit Q1.
Controller can connect in Anneta module 110, be communicated by Anneta module 110 with equipment is read with realizing.The controller can be with
Independently with control module MCU, it can also be realized by same chip, such as NFC chip.
The input terminal of first control unit 120 is connected to Anneta module 110, and according to Anneta module 110 and reads equipment
The duration of coupling controls first switch unit Q1.
As preferred embodiment, as shown in Fig. 2, Anneta module 110 includes antenna ANT and rectifier DZL, rectifier
DZL is used to the antenna ANT energy obtained being converted to direct current, and the output of rectifier DZL is connected to 120 He of first control unit
Control module MCU.
As preferred embodiment, Anneta module 110 further includes filter capacitor C3.
After the antenna ANT of NFC device is coupled with reading equipment, available RF energy, rectifier DZL antenna ANT's
It exports after output rectification to first control unit 120 and control module MCU.As shown in Fig. 2, the pin GPIO1 of control module MCU
It is defined as the pin NFC_DET whether monitoring aerial module 110 couples with reading equipment.The control of control module MCU and first
Unit 120 can judge whether NFC device is in the reading area for reading equipment according to the output of rectifier DZL.
As preferred embodiment, first switch unit Q1 goes out electricity into electric end and first including the first controlled end, first
End, first is used to be connected to power supply V_BAT into electric end, and power supply can be battery in the present embodiment；First current output terminal is connected to control
Molding block MCU, the first controlled end PMONS_EN are connected to first control unit 120 and the second control unit Q3.When first controlled
When end meets the turn-on condition of first switch unit Q1, first is connected into electric end with the first current output terminal, and power supply can be to control mould
Block MCU power supply, control module MCU can carry out logic judgment, can also be communicated by antenna ANT with equipment is read；When first
When controlled end is unsatisfactory for the turn-on condition of first switch unit Q1, first disconnects into electric end and the first current output terminal, and power supply is without normal direction
The functions such as control module MCU powers, and control module MCU can not also be controlled, be communicated.NFC device is in addition to power supply itself at this time
Loss, realize thorough shutdown, avoid unnecessary power consumption.
As preferred embodiment, first switch unit Q1 includes first resistor R1, one end connection of first resistor R1
In the first controlled end, the other end is connected to first into electric end.In the present embodiment, the first controlled end and first is between electric end
When voltage is greater than the first conducting voltage, first is connected into electric end and the first current output terminal.
As preferred embodiment, when the duration that Anneta module 110 couples is less than the first shear duration, the first control is single
First 120 output ends and first are greater than the first conducting voltage into the voltage between electric end；To be set when NFC device is placed on reading
When standby reading area, first switch unit Q1 can be connected, and first is connected into electric end and the first current output terminal, and NFC device powers on
Operation.
The duration that Anneta module 110 couples is when reaching the first shear duration, 120 output end of first control unit and first into
Voltage between electric end is not more than the first conducting voltage.To be placed on the reading area of reading equipment for a long time when NFC device
When, first switch unit Q1 can be disconnected, to make first to disconnect into electric end and the first current output terminal, NFC device is out of service.
In the present embodiment, as shown in Fig. 2, first control unit 120 includes first capacitor C1 and second switch unit Q2,
Second switch unit Q2 includes the second controlled end, second into electric end and the second current output terminal, and second into electric end to be connected to first controlled
End, the second current output terminal are connected to low level；One end of first capacitor C1 is connected to the second controlled end, and the other end is connected to antenna mould
Block 110；First control unit 120 further includes second resistance R2, and the second controlled end is connected to low level by second resistance R2.
When NFC device is just placed on the reading area for reading equipment, rectifier DZL output voltage；Due to the first electricity
The voltage for holding the both ends C1 cannot be mutated, therefore rectifier DZL output voltage can make second switch unit Q2 be connected；Due to
Two are connected to the first controlled end into electric end, therefore the first controlled end is grounded by second switch unit Q2；Due to first resistor R1
Presence, first switch unit Q1 can be connected, and first is connected into electric end and the first current output terminal, electricity operation in NFC device.
When NFC device is placed on the reading area of reading equipment for a long time, the duration that Anneta module 110 couples reaches first
When shear duration, rectifier DZL output voltage charges to first capacitor C1, so that the voltage of the second controlled end is enough to make second to open
Unit Q2 shutdown is closed, the voltage at the both ends first resistor R1 can make first switch unit Q1 also be turned off, to realize first
It is disconnected into electric end and the first current output terminal, NFC device is out of service.
As shown in Figure 1, the second control unit Q3 is connected between control module MCU and first switch unit Q1, mould is controlled
Block MCU is also attached to Anneta module 110；Control module MCU controls the second control unit according to the duration that Anneta module 110 couples
Q3, so that the second control unit Q3 controls first switch unit Q1.
When NFC device is placed on the reading area for reading equipment, first switch unit Q1 can be connected, and first into electricity
End and the conducting of the first current output terminal.Control module MCU energization pins VCC is powered on；Control module MCU can control the second control after powering on
Unit Q3 processed, so that first switch unit Q1 on or off.
As preferred embodiment, as shown in Fig. 2, the second control unit Q3 includes third controlled end, third into electric end
With third current output terminal, third is connected to the first controlled end into electric end, and third current output terminal is connected to low level, the connection of third controlled end
In control module MCU；The pin GPIO2 of control module MCU is defined as the pin POWER_LOCK of the second control unit Q3 of control,
It is turned on or off for controlling third by third controlled end into electric end and third current output terminal.
If control module MCU controls the second control unit Q3 conducting, since third is connected to the first controlled end into electric end, because
This first controlled end is grounded by the second control unit Q3；Due to the presence of first resistor R1, though what Anneta module 110 coupled
When duration reaches the first shear duration, i.e. first capacitor C1 is fully charged, and first switch unit Q1 can still maintain on state, the
One is connected into electric end and the first current output terminal, and NFC device remains operational.
If control module MCU controls the second control unit Q3 shutdown, the voltage at the both ends first resistor R1 can make first
Switch unit Q1 is also turned off, to realize that first disconnects into electric end and the first current output terminal, NFC device is out of service.
In conclusion first switch unit Q1 is used to be connected according to the control of first control unit 120, the second control unit Q3
The connection of on-off switch power supply and load.
As preferred embodiment, control module MCU controls third by third controlled end and goes out electricity into electric end and third
End is turned on or off, and specifically includes at least one of following:
If the duration that control module MCU monitors that Anneta module 110 couples reaches preparation duration, pass through third controlled end
Third is controlled to be connected into electric end and third current output terminal.
The pin GPIO1 of control module MCU is defined as the pin whether monitoring aerial module 110 couples with reading equipment
NFC_DET.When NFC device is just placed on the reading area for reading equipment, electricity operation on control module MCU, and monitor day
The duration that wire module 110 couples such as 1.5 seconds, indicates that stable being in of NFC device is read if the duration reaches preparation duration
The reading area of equipment；Third further can be controlled by third controlled end to be connected into electric end and third current output terminal, to maintain
The conducting of first switch unit Q1；Even if the duration that Anneta module 110 couples reaches the first shear duration, first switch unit Q1
On state can be still maintained, first is connected into electric end and the first current output terminal, and NFC device remains operational.
If the duration that control module MCU monitors that Anneta module 110 couples reaches the duration that transfinites, pass through third controlled end
Third is controlled to disconnect into electric end and third current output terminal.If the coupling of monitoring aerial module 110 after electricity operation on control module MCU
Duration has reached the duration that transfinites, and such as five minutes, may be that NFC device passes into silence in the reading area for reading equipment at this time；Therefore
Third can be controlled by third controlled end to disconnect into electric end and third current output terminal, at the same time, due in first control unit
Capacitor C1 be electrically charged, second also disconnects into electric end and the second current output terminal, to realize first into electric end and the first current output terminal
It disconnects, NFC device is out of service, avoids unnecessary power consumption.
As preferred embodiment, control module MCU is also used to communicate by Anneta module 110 with equipment is read.Control
Being responsible in molding block MCU can be with responsible control the second control unit Q3, monitoring aerial module with the part that reading equipment communicates
110 parts whether coupled with reading equipment independently, can also be realized, such as NFC chip by same chip.
If the duration that control module MCU monitors that Anneta module 110 couples reaches the duration that transfinites, pass through third controlled end
Third is controlled to disconnect into electric end and third current output terminal, specifically: if control module MCU terminates after communicating with reading equipment, monitoring
The duration coupled to Anneta module 110 reaches the duration that transfinites, then controls third by third controlled end and go out electricity into electric end and third
End disconnects.
If control module MCU terminates and reads after equipment communicate, monitor Anneta module 110 still with reading equipment coupling
It has closed a period of time, such as two minutes, may be considered NFC device at this time and pass into silence in the reading area for reading equipment；It therefore can
It is disconnected with controlling third by third controlled end into electric end and third current output terminal, to realize first into electric end and the first current output terminal
It disconnects, NFC device is out of service, avoids unnecessary power consumption.And it can be to avoid when reading equipment and control module MCU long
Between communicate the case where when, mistake shutdown.
NFC device provided by the embodiment of the utility model, simultaneously by first control unit 120 and the second control unit Q3
The first switch unit Q1 for being connected to or disconnecting power supply and control module MCU is controlled, first control unit 120 is used for according to day
Wire module 110 controls the first switch unit Q1 with the duration that equipment couples is read, and control module MCU passes through according to the duration
Second control unit Q3 controls the first switch unit Q1；To enrich the control logic of NFC device switching on and shutting down, Ke Yi
Shutdown is realized when needing, and can satisfy the low-power consumption requirement of NFC device.
As the further improvement of the utility model embodiment, as shown in figure 3, NFC device further includes third control unit
(figure is not infused).In the present embodiment, third control unit includes key S1 and delay unit, and one end of key S1 is connected to low electricity
Flat, the other end is connected to delay unit, and the output end of delay unit is connected to first switch unit Q1.
As preferred embodiment, delay unit includes the second capacitor C2 and 3rd resistor R3 in parallel, the second capacitor
One end of C2 and 3rd resistor R3 are connected to key S1, and the other end is connected to the first controlled end of first switch unit Q1, i.e.,
PMOS_EN。
When key S1 is just pressed, since the voltage at the second both ends capacitor C2 in delay unit cannot be mutated, the
The level of one controlled end is pulled low；When the duration that key S1 is pressed is less than the second shear duration, delay unit output end, i.e.,
Three control unit output ends and first are greater than the first conducting voltage into the voltage between electric end, and first into electric end and the first current output terminal
Conducting.
When key S1 is long pressed, since there is voltage at the both ends 3rd resistor R3, the second capacitor C2 is electrically charged, and works as charging
Reache a certain level so that the first controlled end and first into the voltage between electric end less than the first conducting voltage, first switch list
First Q1 shutdown, first disconnects into electric end and the first current output terminal；It is cut to realize when the key S1 time being pressed reaches second
When becoming duration, delay unit output end, i.e. third control unit output end and first are not more than first into the voltage between electric end
Conducting voltage makes first to disconnect into electric end and the first current output terminal.
As preferred embodiment, the pin GPIO3 of control module MCU is defined as what whether detection key S1 was pressed
Pin SW_POWER, the pin are connected to key S1 by diode D1, so that when the first controlled end is by first control unit 120
Or second control unit Q3 when being pulled to low level, it will not influence the judgement that control module MCU acts key S1.
As preferred embodiment, when control module MCU monitors that the duration that key S1 is pressed is less than preset open
Machine duration is not triggered if after 1.5 seconds, does not just control third by third controlled end and leads into electric end and third current output terminal
Logical, if key S1 is pressed so that delay unit delay is to the second shear duration, the voltage at the second both ends capacitor C2 can make
First switch unit Q1 shutdown will make first to disconnect into electric end and the first current output terminal, and power supply stopping powers to the load.To
It realizes when key S1 is pressed the time less than booting duration, load will not normal boot-strap.
As preferred embodiment, when control module MCU monitors that the duration that key S1 is pressed reaches preset and opens
Machine duration just controls third by third controlled end and is connected into electric end and third current output terminal；Even if delay unit is delayed to second
Shear duration does not make first to disconnect into electric end and the first current output terminal yet, so that power supply be maintained to power to the load, realizes normal boot-strap.
As preferred embodiment, NFC device or load power on booting after, when control module MCU detects key S1
Again the duration pressed, and be triggered reaches preset shutdown duration, such as 1.5 seconds, just controls third by third controlled end
It is disconnected into electric end and third current output terminal, if the delay of delay unit has reached the second shear duration, the output end of delay unit,
Namely first controlled end and first can make first to disconnect into electric end and the first current output terminal into the voltage between electric end, power supply stops
It only powers to the load, realizes the effect of triggering shutdown for a long time.
As preferred embodiment, when control module MCU monitors that the duration that key S1 is pressed reaches preset mistake
Duration, such as 5 seconds are touched, third is just controlled by third controlled end and is disconnected into electric end and third current output terminal, due to delay unit at this time
Be delayed more than the second shear duration, thus the output end of delay unit namely the first controlled end and first into electric end it
Between voltage first can be made to disconnect into electric end and the first current output terminal, power supply stopping powers to the load.To realize when load
There is the relevant apparatus of NFC device provided by the embodiment of the utility model, is being placed on desktop, knapsack, pocket etc., key S1
When being long pressed, power supply will not normally power to the load, and relevant apparatus will not open by mistake machine, be missed so as to avoid key S1
Power consumption when triggering.
NFC device provided by the embodiment of the utility model can also be switched on, shutdown by key S1, be shown with realization, be defeated
The functions such as enter, without with Anneta module 110 and reading equipment and being coupled as compressor start up condition.
As preferred embodiment, NFC device as shown in Figure 3 further includes under-voltage protection unit.In the present embodiment,
Under-voltage protection unit includes voltage checking chip U2, and chip model can be using XC6126 series.Under-voltage protection unit
Input terminal is connected to the first current output terminal, and output end is connected to third controlled end；Under-voltage protection unit goes out electricity for detecting first
The voltage at end controls third into electric end and third by third controlled end when the voltage of the first current output terminal is lower than predeterminated voltage
Current output terminal disconnects.To prevent power supply over-discharge.Even if control module MCU by third controlled end, can not also make third into
Electric end and the conducting of third current output terminal, therefore first switch unit Q1 is unable to maintain that conducting, battery will not export.
" first ", " third " and " third " that the utility model embodiment is related to is only used for distinguishing different components, does not have
Distinguish sequential action.
First switch unit Q1, second switch unit Q2, the second control unit Q3 can for comprising corresponding controlled end, into electricity
Integrated circuit, independent component or the circuit with multiple components at end, current output terminal and corresponding turn-on logic.
As preferred embodiment, first switch unit Q1 includes PMOS tube, and second switch unit Q2, the second control are single
First Q3 includes NMOS tube.
Above embodiment is only preferred embodiments of the present invention, cannot be protected with this to limit the utility model
Range, the variation of any unsubstantiality that those skilled in the art is done on the basis of the utility model and replacement belong to
In the utility model range claimed.
Claims (14)
1. a kind of NFC device, it is characterised in that: including the Anneta module and the first control list for being coupled with reading equipment
Member, the second control unit, first switch unit and control module, the first switch unit are connected between power supply and load；
The input terminal of the first control unit is connected to the Anneta module, and according to the Anneta module and reads equipment coupling
The duration of conjunction controls the first switch unit；
Second control unit is connected between the control module and first switch unit, and the control module is also attached to
The Anneta module；The control module controls second control unit according to the duration of the antenna module couples, so that
Second control unit controls the first switch unit；
The first switch unit is used to that power supply to be connected to or disconnected according to the control of the first control unit, the second control unit
With the connection of load.
2. NFC device as described in claim 1, it is characterised in that: the Anneta module includes antenna and rectifier, described whole
Stream device is used to be converted to the energy that the antenna obtains direct current, and it is single that the output of the rectifier is connected to first control
Member and control module.
3. NFC device as claimed in claim 2, it is characterised in that: the first switch unit includes the first controlled end, first
Into electric end and the first current output terminal, described first is used to be connected to power supply into electric end；First current output terminal is connected to the control
Module, first controlled end are connected to the first control unit and the second control unit.
4. NFC device as claimed in claim 3, it is characterised in that: the first switch unit includes first resistor, and described
One end of one resistance is connected to first controlled end, and the other end is connected to described first into electric end.
5. NFC device as claimed in claim 4, it is characterised in that: first controlled end and first is into the electricity between electric end
When pressure is greater than the first conducting voltage, described first is connected into electric end and the first current output terminal.
6. NFC device as claimed in claim 5, it is characterised in that: the duration of the antenna module couples is less than the first shear
When duration, the first control unit output end and described first is greater than the first conducting voltage into the voltage between electric end；
When the duration of the antenna module couples reaches the first shear duration, the first control unit output end and first is into electricity
Voltage between end is not more than the first conducting voltage.
7. NFC device as claimed in claim 6, it is characterised in that: the first control unit includes first capacitor and second
Switch unit, the second switch unit include the second controlled end, second into electric end and the second current output terminal, and described second into electric end
It is connected to first controlled end, second current output terminal is connected to low level；One end of the first capacitor is connected to described
Second controlled end, the other end are connected to the Anneta module；
The first control unit further includes second resistance, and second controlled end is connected to low electricity by the second resistance
It is flat.
8. NFC device as claimed in claim 4, it is characterised in that: second control unit includes third controlled end, third
Into electric end and third current output terminal, the third is connected to first controlled end into electric end, and the third current output terminal is connected to low
Level, the third controlled end are connected to the control module；
The control module, which is used to control the third by the third controlled end, leads on-off into electric end and third current output terminal
It opens.
9. NFC device as claimed in claim 8, it is characterised in that: the control module is for passing through the third controlled end
It controls the third to be turned on or off into electric end and third current output terminal, specifically include at least one of following:
If the control module monitors that the duration of the antenna module couples reaches preparation duration, controlled by the third
End controls the third and is connected into electric end and third current output terminal；
If the control module monitors that the duration of the antenna module couples reaches the duration that transfinites, controlled by the third
End controls the third and disconnects into electric end and third current output terminal.
10. NFC device as claimed in claim 9, it is characterised in that: the control module is also used to through the Anneta module
It communicates with equipment is read, if the control module monitors that the duration of the antenna module couples reaches the duration that transfinites, passes through
The third controlled end controls the third and disconnects into electric end and third current output terminal, specifically:
If the control module terminates and reads after equipment communicates, monitor that the duration of the antenna module couples reaches when transfiniting
It is long, then the third is controlled by the third controlled end and is disconnected into electric end and third current output terminal.
11. the NFC device as described in any one of claim 4-10, it is characterised in that: it further include third control unit, it is described
Third control unit includes key and delay unit, and one end of the key is connected to low level, and the other end is connected to described prolong
Shi Danyuan, the output end of the delay unit are connected to the first switch unit.
12. NFC device as claimed in claim 11, it is characterised in that: the duration that the key is pressed is less than the second shear
When duration, the third control unit output end and first is greater than the first conducting voltage into the voltage between electric end；
When the duration that the key is pressed reaches the second shear duration, the third control unit output end and first is into electric end
Between voltage be not more than the first conducting voltage.
13. NFC device as claimed in claim 12, it is characterised in that: the delay unit include in parallel the second capacitor and
One end of 3rd resistor, second capacitor and 3rd resistor is connected to the key, and the other end is connected to the first switch
Unit.
14. NFC device as claimed in claim 8, it is characterised in that: further include under-voltage protection unit, the low-voltage is protected
The input terminal of shield unit is connected to first current output terminal, and output end is connected to the third controlled end；The under-voltage protection
Unit is used to detect the voltage of first current output terminal, when the voltage of first current output terminal is lower than predeterminated voltage, passes through institute
It states third controlled end and controls the third into electric end and the disconnection of third current output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820840459.6U CN208402138U (en) | 2018-05-31 | 2018-05-31 | A kind of NFC device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820840459.6U CN208402138U (en) | 2018-05-31 | 2018-05-31 | A kind of NFC device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208402138U true CN208402138U (en) | 2019-01-18 |
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ID=65134650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820840459.6U Active CN208402138U (en) | 2018-05-31 | 2018-05-31 | A kind of NFC device |
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| Country | Link |
|---|---|
| CN (1) | CN208402138U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108901061A (en) * | 2018-05-31 | 2018-11-27 | 深圳市文鼎创数据科技有限公司 | A kind of NFC device |
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2018
- 2018-05-31 CN CN201820840459.6U patent/CN208402138U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108901061A (en) * | 2018-05-31 | 2018-11-27 | 深圳市文鼎创数据科技有限公司 | A kind of NFC device |
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