CN107911147B - Control circuit for NFC near field communication and smart card - Google Patents
Control circuit for NFC near field communication and smart card Download PDFInfo
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- CN107911147B CN107911147B CN201711106753.0A CN201711106753A CN107911147B CN 107911147 B CN107911147 B CN 107911147B CN 201711106753 A CN201711106753 A CN 201711106753A CN 107911147 B CN107911147 B CN 107911147B
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- 230000003993 interaction Effects 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 10
- 230000005674 electromagnetic induction Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 6
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
- H04B5/26—Inductive coupling using coils
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/77—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for interrogation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
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Abstract
The invention discloses a control circuit and an intelligent card for NFC (near field communication), wherein the control circuit comprises at least one antenna, a voltage processing module, a control module, a gating switch module and a preset number of radio frequency communication modules, the antenna acquires wireless electric energy from external NFC equipment and outputs alternating current to the voltage processing module, and the voltage processing module processes the alternating current into direct current power supply voltage to supply power to the control module; the control module outputs a switch control signal to the gating switch module, and the gating switch module switches on or off the connection between the corresponding radio frequency communication module and the corresponding antenna according to the switch control signal; when the radio frequency communication module is communicated with the antenna, the radio frequency communication module carries out radio frequency communication with the NFC equipment through the antenna. The intelligent card solves the problem of internal power taking of the intelligent card, does not need to be additionally provided with a battery, simplifies a hardware circuit, has various radio frequency communication functions, can be switched among various radio frequency communication modes, and can be applied to various occasions.
Description
Technical Field
The invention relates to the technical field of NFC (near field communication), in particular to a control circuit and a smart card for NFC near field communication.
Background
Near Field Communication (NFC) is a short-range high-frequency radio technology, and is integrated and evolved from a non-contact Radio Frequency Identification (RFID) and an interconnection technology, and combines functions of an induction card reader, an induction card and point-to-point on a single chip, so that identification and data exchange can be performed with compatible equipment in a short distance. NFC near field communication technology is commonly applied in smart cards.
The problem of getting electricity is generally solved through battery power supply in current NFC communication product, causes the loss and the waste of battery power, makes the product life shorten.
Disclosure of Invention
The embodiment of the invention provides a control circuit and an intelligent card for Near Field Communication (NFC), and aims to solve the problems that power is supplied by a battery in the prior art, so that the electric quantity of the battery is consumed and wasted, and the service life of a product is shortened.
A first aspect of an embodiment of the present invention provides a control circuit for NFC near field communication, including at least one antenna, a voltage processing module, a control module, a gating switch module, and a preset number of radio frequency communication modules.
The antenna is respectively connected with the voltage processing module and the gating switch module, the control module is respectively connected with the voltage processing module and the gating switch module, and the gating switch module is connected with the radio frequency communication module.
The antenna acquires wireless electric energy from external NFC equipment in an electromagnetic induction coupling mode and outputs alternating current to the voltage processing module, and the voltage processing module processes the alternating current into direct current power supply voltage and outputs the direct current power supply voltage to the control module to supply power to the control module; the control module outputs a switch control signal to the gating switch module, and the gating switch module switches on or off the connection between the corresponding radio frequency communication module and the corresponding antenna according to the switch control signal; when the radio frequency communication module is communicated with the antenna, the radio frequency communication module carries out radio frequency communication with the NFC equipment through the antenna.
In one embodiment, the control circuit for NFC near-field communication includes an antenna, and the antenna receives a radio frequency signal sent by the NFC device and forwards the radio frequency signal to a corresponding radio frequency communication module through the gating switch module.
In one embodiment, the control circuit for NFC near field communication includes antennas in the same number as the number of the radio frequency communication modules, all the antennas are connected to the gating switch module, and the gating switch module turns on or off the connection between a corresponding one of the radio frequency communication modules and a corresponding one of the antennas according to the switch control signal.
In one embodiment, the control circuit for NFC near field communication includes antennas in the same number as the radio frequency communication modules, the gating switch module includes switch units in the same number as the radio frequency communication modules, one antenna is correspondingly connected to one switch unit, and one switch unit is correspondingly connected to one radio frequency communication module.
In one embodiment, the voltage processing module comprises a rectifying unit, a voltage stabilizing unit and a voltage converting unit which are connected in sequence.
The rectifying unit receives alternating current, rectifies the alternating current and outputs direct current, the voltage stabilizing unit stabilizes the direct current, and the voltage converting unit converts the stabilized direct current into power supply voltage required by the control module.
In one embodiment, the rectifying unit includes a first diode, a second diode, a third diode, and a fourth diode.
The anode of the first diode and the cathode of the second diode are connected in common to form a first input end of the rectifying unit, the anode of the third diode and the cathode of the fourth diode are connected in common to form a second input end of the rectifying unit, the cathode of the first diode and the cathode of the third diode are connected in common to form a first output end of the rectifying unit, and the anode of the second diode and the anode of the fourth diode are connected in common to ground and form a second output end of the rectifying unit.
In one embodiment, the voltage stabilization unit includes a zener diode and a filter capacitor.
The cathode of the Zener diode and the first end of the filter capacitor are connected together to form the first end of the voltage stabilizing unit, and the anode of the Zener diode and the second end of the filter capacitor are connected together to form the second end of the voltage stabilizing unit.
In one embodiment, the radio frequency communication device further comprises a filtering module, wherein the filtering module is connected between the antenna and the gating switch module and is used for filtering interference signals in the radio frequency communication.
In one embodiment, the intelligent control system further comprises a manual interaction module, wherein the manual interaction module is connected with the control module, receives a user instruction and forwards the user instruction to the control module, so that the control module outputs a corresponding switch control signal; the manual interaction module also receives and outputs the switch state signal fed back by the control module.
A second aspect of embodiments of the present invention provides a smart card comprising a control circuit for NFC near-field communication as described above.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: the antenna acquires wireless electric energy from external NFC equipment in an electromagnetic induction coupling mode and outputs alternating current to the voltage processing module, and the voltage processing module processes the alternating current into direct current power supply voltage and outputs the direct current power supply voltage to the control module to supply power to the control module; the control module outputs a switch control signal to the gating switch module, and the gating switch module switches on or off the connection between the corresponding radio frequency communication module and the corresponding antenna according to the switch control signal; when the radio frequency communication module is communicated with the antenna, the radio frequency communication module carries out radio frequency communication with the NFC equipment through the antenna. When the smart card uses the NFC equipment to read the card, the smart card can be charged, the problem of taking electricity from the inside of the smart card is solved, a battery does not need to be additionally configured, devices in a product are reduced, a hardware circuit is simplified, and the cost of the product is reduced. And the intelligent card has multiple radio frequency communication functions, can be switched among multiple radio frequency communication modes, and can be applied to multiple occasions.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic block structure diagram of a control circuit for NFC near field communication according to an embodiment of the present invention;
fig. 2 is a schematic block structure diagram of a control circuit for NFC near field communication according to an embodiment of the present invention;
fig. 3 is a schematic circuit structure diagram of a control circuit for NFC near field communication according to an embodiment of the present invention.
Detailed Description
In order to make the technical solution better understood by those skilled in the art, the technical solution in the embodiment of the present invention will be clearly described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is a part of the embodiment of the present invention, and not a whole embodiment. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present disclosure without any creative effort shall fall within the protection scope of the present disclosure.
The terms "include" and any other variations in the description and claims of this document and the above-described figures, mean "including but not limited to", and are intended to cover non-exclusive inclusions. Furthermore, the terms "first" and "second," etc. are used to distinguish between different objects and are not used to describe a particular order.
Implementations of the present invention are described in detail below with reference to the following detailed drawings:
fig. 1 and fig. 2 show a structure of a control circuit 100 for NFC near field communication according to an embodiment of the present invention, and for convenience of description, only parts related to the embodiment of the present invention are shown, and detailed descriptions are as follows:
as shown in fig. 1 and fig. 2, a control circuit 100 for NFC near field communication according to an embodiment of the present invention includes at least one antenna 110, a voltage processing module 120, a control module 130, a gating switch module 140, and a preset number of radio frequency communication modules 150.
The antenna 110 is respectively connected with the voltage processing module 120 and the gating switch module 140, the control module 130 is respectively connected with the voltage processing module 120 and the gating switch module 140, and the gating switch module 140 is connected with the radio frequency communication module 150.
The antenna 110 acquires wireless power from the external NFC device 200 in an electromagnetic induction coupling manner and outputs alternating current to the voltage processing module 120, and the voltage processing module 120 processes the alternating current into direct current power supply voltage and outputs the direct current power supply voltage to the control module 130 to supply power to the control module 130; the control module 130 outputs a switch control signal to the gating switch module 140, and the gating switch module 140 turns on or off the connection between the corresponding rf communication module 150 and the corresponding antenna 110 according to the switch control signal; when the radio frequency communication module 150 is conducted with the antenna 110, the radio frequency communication module 150 performs radio frequency communication with the NFC device 200 through the antenna 110.
In one embodiment, the antenna 110 is a planar coil antenna.
In the embodiment of the present invention, the control circuit 100 for NFC near field communication may be applied to a smart card product.
This embodiment is through antenna 110 with the mode of electromagnetic induction from NFC equipment 200 wireless electricity of getting to for control module 130 power supply, for example, when the smart card used NFC equipment 200 to read the card, alright in order to realize charging, solved the inside problem of getting the electricity of smart card product, need not additionally to dispose the battery, reduced the device in the product, simplified hardware circuit, reduced the cost of product.
In one embodiment, the gating switch module 140 switches on the connection between one rf communication module 150 and one antenna 110 according to the switch control signal, and the remaining rf communication modules 150 and the antennas 110 are in the disconnected state.
In the embodiment, the control module 130 controls the gating switch module 140 to switch, so that the antennas 110 can be connected to different rf communication modules 150, and at the same time, one antenna 110 can only be connected to one rf communication module 150, and the other rf communication modules 150 do not operate. The intelligent card has multiple radio frequency communication functions (and can be switched among multiple radio frequency communication modes), multiple radio frequency communication modules 150 on one intelligent card cannot interfere with one another, and the intelligent card can be applied to multiple occasions, for example, the intelligent card has a bus card function and a bank card function at the same time.
In the embodiment of the present invention, the control module 130 outputs a switch control signal to the gating switch module 140, and the gating switch module 140 turns on or off the connection between the corresponding rf communication module 150 and the corresponding antenna 110 according to the switch control signal, thereby implementing different rf communication functions. The gating switch module 140 may include a single-pole multi-throw switch, and except that the required rf communication module 150 is connected to the corresponding antenna 110, other rf communication modules 150 are all in a suspended state, so that no influence is caused on rf communication and wireless power supply.
In a specific application, the process of controlling the gating switch module 140 by the control module 130 specifically includes:
1) when the power is turned on, the control module 130 enters a working state, and all the rf communication modules 150 and the antenna 110 are in a disconnected state.
2) When the control module 130 receives a user instruction, the control module 130 outputs a corresponding switch control signal to the gating switch module 140 according to the user instruction, so that one antenna 110 is connected to the designated radio frequency communication module 150.
As shown in fig. 1, in an embodiment of the present invention, the control circuit 100 for NFC near field communication includes an antenna 110, and the antenna 110 receives a radio frequency signal transmitted by an NFC device and forwards the radio frequency signal to a corresponding radio frequency communication module 150 through a gating switch module 140.
In one embodiment of the present invention, the gating switch module 140 includes a multiplexing switch.
The embodiment is suitable for the application scenario with only one antenna 110, the mode of controlling the switching of the gating switch module 140 through the control module 130 and the multiple communication modules to realize respective communication functions, the multiple communication modes can be switched at will, the problems of mutual communication interference and energy absorption among the multiple antennas 110 are solved, and the situation of communication conflict is avoided.
In one embodiment, the control circuit 100 for NFC near field communication includes the same number of antennas 110 as the number of the radio frequency communication modules 150, all the antennas 110 are connected to the gating switch module 140, and the gating switch module 140 turns on or off the connection between a corresponding one of the radio frequency communication modules 150 and a corresponding one of the antennas 110 according to the switch control signal.
As shown in fig. 2, in one embodiment of the present invention, the control circuit 100 for NFC near field communication includes the same number of antennas 110 as the number of radio frequency communication modules 150, the gating switch module 140 includes the same number of switch units 141 as the number of radio frequency communication modules 150, one antenna 110 is connected to one switch unit 141 and one switch unit 141 is connected to one radio frequency communication module 150.
In this embodiment, any one of the antennas 110 is connected to the voltage processing module 120, and acquires wireless power from the external NFC device 200 through an electromagnetic induction coupling manner and outputs alternating current to the voltage processing module 120, so that the voltage processing module 120 supplies power to the control module 130.
In one embodiment, the switching unit 141 may be an electronic switching tube, such as a triode, a MOS tube, or the like.
The embodiment is suitable for application scenarios with a plurality of antennas 110, and the gating switch module 140 switches between different communication modules, so that the control process is simple and easy to implement.
Fig. 3 shows a circuit structure of the control circuit 100 for NFC near field communication according to an embodiment of the present invention, and for convenience of description, only the portions related to the embodiment of the present invention are shown, which is detailed as follows:
in one embodiment of the present invention, as shown in fig. 3, the antenna 110 is a planar coil antenna T1.
The planar coil antenna T1 obtains ac power from the NFC device 200 (e.g., card reader) by electromagnetic induction.
As shown in fig. 3, in one embodiment of the present invention, the voltage processing module 120 includes a rectifying unit 121, a voltage stabilizing unit 122, and a voltage converting unit 123, which are connected in sequence.
The rectifying unit 121 receives the ac power, rectifies the ac power, and outputs a dc power, the voltage stabilizing unit 122 stabilizes the dc power, and the voltage converting unit 123 converts the stabilized dc power into a power supply voltage required by the control module 130.
In this embodiment, the first terminal and the second terminal of the planar coil antenna T1 are respectively connected to the first input terminal and the second input terminal of the rectifying unit 121 in a one-to-one correspondence, the first output terminal and the second output terminal of the rectifying unit 121 are respectively connected to the first terminal and the second terminal of the voltage stabilizing unit 122 in a one-to-one correspondence, and the first terminal and the second terminal of the voltage stabilizing unit 122 are further connected to the voltage converting unit 123.
In this embodiment, the antenna 110 obtains the wireless power from the external NFC device 200 through the electromagnetic induction coupling method and outputs the alternating current, and the alternating current cannot be directly applied to the internal module of the smart card, so that the alternating current needs to be processed. In this embodiment, the ac power is transmitted to the rectifying unit 121, the rectifying unit 121 rectifies the ac power and outputs a dc power, and the dc power is converted into a stable and appropriate power supply voltage through the voltage stabilizing processing of the voltage stabilizing unit 122 and the voltage conversion processing of the voltage converting unit 123, and the power supply voltage is used for supplying power to the control module 130.
As shown in fig. 3, in one embodiment of the present invention, the rectifying unit 121 includes a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4.
An anode of the first diode D1 and a cathode of the second diode D2 are commonly connected to form a first input terminal of the rectifying unit 121, an anode of the third diode D3 and a cathode of the fourth diode D4 are commonly connected to form a second input terminal of the rectifying unit 121, a cathode of the first diode D1 and a cathode of the third diode D3 are commonly connected to form a first output terminal of the rectifying unit 121, and an anode of the second diode D2 and an anode of the fourth diode D4 are commonly connected to ground and form a second output terminal of the rectifying unit 121.
In this embodiment, the alternating current output by the antenna 110 is converted into direct current through a rectifier bridge circuit composed of the first diode D1, the second diode D2, the third diode D3, and the fourth diode D4.
As shown in fig. 3, in one embodiment of the present invention, the voltage stabilizing unit 122 includes a zener diode D5 and a filter capacitor C1.
The cathode of the zener diode D5 is connected to the first terminal of the filter capacitor C1 to form the first terminal of the voltage regulator 122, and the anode of the zener diode D5 is connected to the second terminal of the filter capacitor C1 to form the second terminal of the voltage regulator 122.
In this embodiment, the rectifying unit 121 outputs the direct current to the voltage stabilizing unit 122, and in order to prevent the device in the subsequent circuit from being damaged due to the excessively high voltage of the direct current, the zener diode D5 is disposed in the voltage stabilizing unit 122 to limit the voltage of the direct current, so as to protect the device in the subsequent circuit. The voltage stabilizing unit 122 transmits the stabilized dc power to the voltage converting unit 123 to obtain the required voltage value for output.
In one embodiment, the voltage stabilization unit 122 comprises a linear regulator.
In a specific application, the linear Regulator is an LDO (Low Dropout Regulator) Low Dropout Regulator.
As shown in fig. 3, in an embodiment of the present invention, the control circuit 100 for NFC near field communication further includes a filtering module 160, where the filtering module 160 is connected between the antenna 110 and the gating switch module 140, and the filtering module 160 is configured to filter an interference signal in radio frequency communication.
As shown in fig. 3, the filter module 160 includes a second filter capacitor C2.
As shown in fig. 3, in an embodiment of the present invention, the control circuit 100 for NFC near field communication further includes a manual interaction module 170, the manual interaction module 170 is connected to the control module 130, and the manual interaction module 170 receives a user instruction and forwards the user instruction to the control module 130, so that the control module 130 outputs a corresponding switch control signal; the manual interaction module 170 also receives and outputs the switch state signal fed back by the control module 130.
In one embodiment, human interaction module 170 includes a touch screen display.
In one embodiment, the human interaction module 170 includes an input unit and an output display unit.
In a specific application, the input unit includes an input device such as a key, and the output display unit includes a display device such as a display.
An embodiment of the present invention further provides a smart card, including the control circuit 100 for NFC near field communication as described above.
In summary, the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A control circuit for NFC near field communication is characterized by comprising at least one antenna, a voltage processing module, a control module, a gating switch module and a preset number of radio frequency communication modules;
the antenna is respectively connected with the voltage processing module and the gating switch module, the control module is respectively connected with the voltage processing module and the gating switch module, and the gating switch module is connected with the radio frequency communication module;
the antenna acquires wireless electric energy from external NFC equipment in an electromagnetic induction coupling mode and outputs alternating current to the voltage processing module, and the voltage processing module processes the alternating current into direct current power supply voltage and outputs the direct current power supply voltage to the control module so as to supply power to the control module; the control module outputs a switch control signal to the gating switch module, and the gating switch module switches on or off the connection between the corresponding radio frequency communication module and the corresponding antenna according to the switch control signal; when the radio frequency communication module is conducted with the antenna, the radio frequency communication module carries out radio frequency communication with the NFC equipment through the antenna; the control module controls the gating switch module to switch, so that the antennas can be connected with different radio frequency communication modules, and one antenna can be connected with only one radio frequency communication module at the same time.
2. The control circuit for NFC near-field communication of claim 1, wherein the control circuit includes an antenna that receives radio frequency signals transmitted by the NFC device and forwards the radio frequency signals to the corresponding radio frequency communication module through the gating switch module.
3. The control circuit for NFC near-field communication according to claim 1, wherein the control circuit includes the same number of antennas as the number of the radio frequency communication modules, all of the antennas are connected to the gate switch module, and the gate switch module turns on or off the connection of a corresponding one of the radio frequency communication modules and a corresponding one of the antennas according to the switch control signal.
4. The control circuit for NFC near-field communication of claim 1, wherein the control circuit includes a same number of antennas as the number of the radio frequency communication modules, the gating switch module includes a same number of switch units as the number of the radio frequency communication modules, one antenna is connected to one switch unit and one switch unit is connected to one radio frequency communication module.
5. The control circuit for NFC near-field communication according to claim 1, wherein the voltage processing module includes a rectifying unit, a voltage stabilizing unit, and a voltage converting unit, which are connected in sequence;
the rectifying unit receives the alternating current and outputs direct current after rectification processing, the voltage stabilizing unit stabilizes the direct current, and the voltage converting unit converts the stabilized direct current into power supply voltage required by the control module.
6. The control circuit for NFC near-field communication of claim 5, wherein the rectifying unit includes a first diode, a second diode, a third diode, and a fourth diode;
the anode of the first diode and the cathode of the second diode are connected in common to form a first input end of the rectifying unit, the anode of the third diode and the cathode of the fourth diode are connected in common to form a second input end of the rectifying unit, the cathode of the first diode and the cathode of the third diode are connected in common to form a first output end of the rectifying unit, and the anode of the second diode and the anode of the fourth diode are connected in common to ground and form a second output end of the rectifying unit.
7. The control circuit for NFC near-field communication of claim 5, wherein the voltage stabilization unit includes a zener diode and a filter capacitor;
the cathode of the Zener diode and the first end of the filter capacitor are connected in common to form the first end of the voltage stabilizing unit, and the anode of the Zener diode and the second end of the filter capacitor are connected in common to form the second end of the voltage stabilizing unit.
8. A control circuit for NFC near field communication according to any one of claims 1 to 7 further comprising a filtering module connected between the antenna and the gating switch module, the filtering module being configured to filter out interfering signals in the radio frequency communication.
9. The control circuit for NFC near field communication according to any one of claims 1 to 7, further comprising a manual interaction module connected to the control module, the manual interaction module receiving a user instruction and forwarding to the control module to cause the control module to output the corresponding switch control signal; and the manual interaction module also receives and outputs the switch state signal fed back by the control module.
10. A smart card characterized by comprising the control circuit for NFC near-field communication according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711106753.0A CN107911147B (en) | 2017-11-10 | 2017-11-10 | Control circuit for NFC near field communication and smart card |
| PCT/CN2018/098333 WO2019091154A1 (en) | 2017-11-10 | 2018-08-02 | Control circuit for near field communication (nfc) and smart card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711106753.0A CN107911147B (en) | 2017-11-10 | 2017-11-10 | Control circuit for NFC near field communication and smart card |
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| Publication Number | Publication Date |
|---|---|
| CN107911147A CN107911147A (en) | 2018-04-13 |
| CN107911147B true CN107911147B (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711106753.0A Active CN107911147B (en) | 2017-11-10 | 2017-11-10 | Control circuit for NFC near field communication and smart card |
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| WO (1) | WO2019091154A1 (en) |
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| CN107911147B (en) * | 2017-11-10 | 2020-05-19 | 深圳市文鼎创数据科技有限公司 | Control circuit for NFC near field communication and smart card |
| 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 |
| CN108649814A (en) * | 2018-06-13 | 2018-10-12 | 深圳市文鼎创数据科技有限公司 | Smart card, intelligent card control method, device and equipment |
| GB2575685B (en) * | 2018-07-20 | 2020-11-18 | Drayson Tech Europe Ltd | Circuitry for use in smart cards and other applications |
| CN109510324A (en) * | 2018-12-19 | 2019-03-22 | 上海科世达-华阳汽车电器有限公司 | A kind of automobile and its human-computer interaction device |
| FR3098908A1 (en) * | 2019-07-19 | 2021-01-22 | Continental Automotive Gmbh | Non-contact sensor for motor vehicle |
| WO2021092891A1 (en) * | 2019-11-15 | 2021-05-20 | 深圳市汇顶科技股份有限公司 | Power supply system, power receiving system, main body of electronic cigarette, and cigarette cartridge |
| CN113067604B (en) * | 2020-01-02 | 2022-08-30 | 深圳市文鼎创数据科技有限公司 | NFC access control circuit and NFC device |
| CN111641437B (en) * | 2020-05-28 | 2021-06-18 | Oppo（重庆）智能科技有限公司 | Near field communication and wireless charging antenna module and electronic device |
| CN115085770B (en) * | 2021-03-15 | 2023-07-28 | 上海复旦微电子集团股份有限公司 | Passive NFC interface and device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9030052B2 (en) * | 2011-05-17 | 2015-05-12 | Samsung Electronics Co., Ltd. | Apparatus and method for using near field communication and wireless power transmission |
| CN103177228B (en) * | 2011-12-26 | 2016-05-18 | 国民技术股份有限公司 | A kind of smart card method of work and smart card |
| US20170093463A1 (en) * | 2014-03-17 | 2017-03-30 | Yee Tak Wong | Device and method for controlling electronic device to act in a batteryless manner and use thereof |
| CN106855955A (en) * | 2015-12-09 | 2017-06-16 | 北京握奇智能科技有限公司 | A kind of New Type IC Card of shared NFC antenna |
| CN207638657U (en) * | 2017-11-10 | 2018-07-20 | 深圳市文鼎创数据科技有限公司 | A kind of control circuit and smart card for NFC near-field communications |
| CN107911147B (en) * | 2017-11-10 | 2020-05-19 | 深圳市文鼎创数据科技有限公司 | Control circuit for NFC near field communication and smart card |
-
2017
- 2017-11-10 CN CN201711106753.0A patent/CN107911147B/en active Active
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2018
- 2018-08-02 WO PCT/CN2018/098333 patent/WO2019091154A1/en active Application Filing
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| Publication number | Publication date |
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| CN107911147A (en) | 2018-04-13 |
| WO2019091154A1 (en) | 2019-05-16 |
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