CN112803958B - NFC-SIM system, control method and mobile terminal - Google Patents
NFC-SIM system, control method and mobile terminal Download PDFInfo
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- CN112803958B CN112803958B CN202110380654.1A CN202110380654A CN112803958B CN 112803958 B CN112803958 B CN 112803958B CN 202110380654 A CN202110380654 A CN 202110380654A CN 112803958 B CN112803958 B CN 112803958B
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- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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Abstract
The embodiment of the invention discloses an NFC-SIM system, a control method and a mobile terminal. After the microprocessor receives the magnetic field communication information returned by the NFC antenna module, the microprocessor sends a high-level signal to the control end of the analog switch to enable the analog switch to be switched on, the signal amplifier starts to work to amplify the NFC magnetic flux signal sent by the NFC antenna module, and therefore the signal intensity is enough to be stably connected with a receiving terminal. And after the NFC communication is finished, the microprocessor controls the analog switch to be closed to enable the signal amplifier to stop working, so that the coupling effect between the signal amplifier and the NFC antenna module is prevented from influencing the connection of other communication signals of the mobile equipment.
Description
Technical Field
The invention relates to the field of communication, in particular to an NFC-SIM system, a control method and a mobile terminal.
Background
With the continuous development of communication technologies, the use of NFC-SIM chips becomes more common in mobile terminals, and the NFC-SIM chips in the mobile terminals often have situations where the signal strength is not sufficient and other devices cannot stably identify NFC signals. Moreover, the existing method for amplifying the NFC signal often affects the signal strength of the signals such as bluetooth signal, 4G signal, 5G signal, and the like due to the amplification of the NFC signal.
Therefore, the existing NFC-SIM chip has the problem that the existing NFC-SIM chip cannot be stably identified by the terminal equipment.
Disclosure of Invention
In order to solve the above technical problem, an embodiment of the present disclosure provides an NFC-SIM system, a control method, and a mobile terminal, and the specific scheme is as follows:
in a first aspect, an embodiment of the present disclosure provides a red NFC-SIM system, where the system includes a microprocessor, an NFC antenna module, an analog switch, and a signal amplifier;
the microprocessor is electrically connected with the communication end of the NFC antenna module, the microprocessor is electrically connected with the control end of the analog switch, and a first contact and a second contact of the analog switch are respectively electrically connected with two ends of the signal amplifier;
the microprocessor controls the NFC antenna module to convert preset NFC label information into an NFC magnetic flux signal, the microprocessor receives NFC magnetic field communication information transmitted back by a communication end of the NFC antenna module, and the microprocessor controls the signal amplifier to amplify the NFC magnetic flux signal transmitted by the NFC antenna module through the analog switch.
According to a specific embodiment of the present disclosure, the signal amplifier includes a first capacitor, a first inductor, and a second inductor connected in series in sequence;
a first contact of the analog switch is electrically connected with the first capacitor;
and the second contact of the analog switch is electrically connected with the second inductor.
According to a specific embodiment of the present disclosure, the signal amplifier further includes a first filtering branch and a second filtering branch;
the first filtering branch circuit comprises a second capacitor, one end of the second capacitor is connected to the first contact of the analog switch, and the other end of the second capacitor is grounded;
the second filtering branch circuit comprises a third capacitor, one end of the third capacitor is connected to the second contact of the analog switch, and the other end of the third capacitor is grounded.
According to a specific embodiment of the present disclosure, the NFC antenna module includes an active NFC antenna and an NFC chip, and the active NFC antenna is electrically connected to the NFC chip;
the microprocessor is electrically connected with the NFC chip;
the active NFC antenna is used for sending the NFC magnetic flux signal and receiving a communication signal in a magnetic field, and the NFC chip is used for receiving communication data sent back by the active NFC antenna.
According to a specific embodiment of the present disclosure, the active NFC antenna includes a fourth capacitor, a third filter circuit, a signal transmitting circuit, a fourth filter circuit, and a fifth capacitor, which are sequentially connected in series;
the fourth capacitor and the fifth capacitor are used for receiving communication signals in an NFC magnetic field and transmitting the communication signals back to the NFC chip;
the signal transmitting circuit comprises a third inductor, a first resistor, a sixth capacitor and a seventh capacitor which are connected in parallel;
the third filter circuit comprises an eighth capacitor and a ninth capacitor which are connected in parallel, and the fourth filter circuit comprises a tenth capacitor and an eleventh capacitor which are connected in parallel.
According to a specific embodiment of the present disclosure, the system further comprises a security chip;
the safety chip is electrically connected with the microprocessor and used for storing the NFC label signal received by the mobile terminal.
According to a specific embodiment of the present disclosure, the system further comprises a SIM contact chip electrically connected with the microprocessor.
According to a specific embodiment of the present disclosure, the system further comprises a wireless communication module;
the wireless communication module is electrically connected with the microprocessor;
the wireless communication module comprises at least one of a Bluetooth module, a 4G signal and a 5G signal.
In a second aspect, an embodiment of the present disclosure further provides an NFC-SIM control method applied to the NFC-SIM system in the first aspect, where when the microprocessor starts an NFC function, the method includes:
extracting preset NFC label information;
transmitting the NFC label information to an NFC antenna module;
receiving NFC magnetic field communication information sent by the NFC antenna module;
controlling the analog switch to be conducted so that the signal amplifier amplifies the NFC magnetic flux signal sent by the NFC antenna module;
and when an NFC function completion instruction is received, controlling the analog switch to be closed.
In a third aspect, an embodiment of the present disclosure further provides a mobile terminal, including the NFC-SIM system in the first aspect.
According to the NFC-SIM system provided by the embodiment of the disclosure, when a user uses an NFC function, the microprocessor sends preset NFC label information to the NFC antenna module, so that the NFC antenna module sends a magnetic flux signal to form magnetic field communication with a receiving terminal. After the microprocessor receives the magnetic field communication information returned by the NFC antenna module, the microprocessor sends a high-level signal to the control end of the analog switch to enable the analog switch to be switched on, the signal amplifier starts to work to amplify the NFC magnetic flux signal sent by the NFC antenna module, and therefore the signal intensity is enough to be stably connected with a receiving terminal. And after the NFC communication is completed, the microprocessor sends a low level signal to the control end of the analog switch to close the analog switch, and the signal amplifier stops working, so that the coupling effect between the signal amplifier and the NFC antenna module is prevented from influencing the connection of other communication signals of the mobile equipment, and the stability of the communication signal connection of the mobile terminal is greatly ensured.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention. Like components are numbered similarly in the various figures.
Fig. 1 shows a block diagram of modules of an NFC-SIM system provided by an embodiment of the present disclosure;
fig. 2 shows a circuit diagram of a signal amplifying circuit in an NFC-SIM system provided by an embodiment of the present disclosure;
fig. 3 shows a circuit diagram of an NFC antenna module in an NFC-SIM system provided by an embodiment of the present disclosure;
fig. 4a and 4b show circuit diagrams of a microprocessor in the NFC-SIM system provided by the embodiment of the present disclosure;
fig. 5 shows a flowchart of a method of controlling an NFC-SIM according to an embodiment of the present disclosure;
fig. 6 shows another block diagram of modules of the NFC-SIM system provided in the embodiment of the present disclosure.
Summary of reference numerals:
NFC-SIM system-100; a microprocessor-110; -120, an analog switch; a signal amplifier-130; an NFC antenna module-140; an NFC chip-141; an active NFC antenna-142; a secure chip-150; SIM contact chip-160; a wireless communication module-170; -180 a crystal circuit; power supply-190.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
Referring to fig. 1, an embodiment of the present disclosure provides an NFC-SIM system 100 applied to a mobile terminal, as shown in fig. 1, the system includes a microprocessor 110, an analog switch 120, a signal amplifier 130, and an NFC antenna module 140;
the microprocessor 110 is electrically connected to the communication terminal of the NFC antenna module 140, the microprocessor 110 is electrically connected to the control terminal of the analog switch 120, and the first contact and the second contact of the analog switch 120 are electrically connected to two ends of the signal amplifier 130 respectively;
the microprocessor 110 controls the NFC antenna module 140 to convert preset NFC tag information into an NFC magnetic flux signal, the microprocessor 110 receives NFC magnetic field communication information returned by the communication terminal of the NFC antenna module 140, and the microprocessor 110 controls the signal amplifier 130 to amplify the NFC magnetic flux signal sent by the NFC antenna module 140 through the analog switch 120.
Specifically, when the user uses the NFC function, the microprocessor 110 sends the predetermined NFC tag information to the NFC antenna module 140, so that the NFC antenna module 140 converts the NFC tag information into an NFC magnetic flux signal, and forms an NFC communication magnetic field with the receiving terminal. After receiving the communication information of the NFC communication magnetic field, the NFC antenna module 140 sends the communication information to the microprocessor 110, the microprocessor 110 sends a high level signal to the analog switch 120 to control the analog switch 120 to be closed, so that the signal amplifier 130 starts working, the signal amplifier 130 and the NFC antenna module 140 form a coupling effect therebetween, thereby increasing the magnetic flux of the NFC magnetic flux signal, so that the radiation area of the NFC magnetic flux signal is wider, and it is convenient for the receiving terminal receives the NFC magnetic flux signal sent by the NFC antenna module more stably, and the stable execution of the NFC function is ensured.
Further, after the NFC function is completed, the NFC antenna module may send a completion instruction to the microprocessor 110, and after receiving the completion instruction, the microprocessor 110 sends a low level signal to the analog switch 120 to control the analog switch 120 to be turned off, so that the signal amplifier 130 stops working, thereby ensuring that no coupling is formed between the signal amplifier 130 and the NFC antenna module when the NFC function is not used, and avoiding interference to other communication signals.
Referring to fig. 2, according to an embodiment of the present disclosure, the signal amplifier 130 includes a first capacitor, a first inductor, and a second inductor connected in series in sequence;
a first contact of the analog switch 120 is electrically connected to the first capacitor;
the second contact of the analog switch 120 is electrically connected to the second inductor.
Specifically, the signal amplifier 130 further includes a first filtering branch and a second filtering branch;
the first filtering branch comprises a second capacitor, one end of the second capacitor is connected to the first contact of the analog switch 120, and the other end of the second capacitor is grounded;
the second filtering branch comprises a third capacitor, one end of the third capacitor is connected to the second contact of the analog switch 120, and the other end of the third capacitor is grounded.
As shown in fig. 2, specifically, the first inductor is ANT2, the second inductor is ANT3, the first capacitor is C14, the first inductor and the second inductor are respectively an on-board coil subjected to preset resonance, test and verification, the number of turns of the coil is preferably selected according to different device test results, and preferably, the number of turns of the on-board coil is 6 turns and is arranged in a positive-negative parallel manner. The capacitance is preferably a capacitance element with a capacitance value of 130 picofarads, and a specific capacitance value may be selected preferentially according to an actual amplification effect, and the specific capacitance value of the capacitance element is not limited herein.
The signal amplifier 130 comprises a first capacitor, a first inductor and a second inductor which are connected in series, the working principle of the signal amplifier 130 is that after the analog switch 120 is switched on, the signal amplifier 130 is in a conducting state, the first inductor and the second inductor form a coupling effect with the active NFC antenna 142 in the NFC antenna module 140, so that the magnetic flux signal sent by the active NFC antenna 142 by the NFC antenna module 140 is amplified, and the signal intensity of the NFC signal can be greatly improved through the coupling amplification effect between the passive coupling amplification circuit and the active NFC antenna 142, and stable communication between the NFC signal and other receiving devices is ensured.
For example, when the signal amplifier 130 is not operated, the strength of the magnetic flux signal emitted by the NFC antenna module 140 is 0.88db at most, and when the signal amplifier 130 is operated, the strength of the magnetic flux signal emitted by the NFC antenna module 140 is 4.7db at most.
In addition, the signal amplifier 130 further includes a first filter circuit and a second filter circuit, so as to ensure that the waveforms amplified by the first inductor and the second inductor are stable when the first inductor and the second inductor form a coupling effect with the inductor in the NFC antenna module 140. Preferably, the capacitance values of the second capacitor and the third capacitor are 100 picofarads.
The analog switch 120 and the microprocessor 110 are electrically connected to the microprocessor 110 through an RF contirl pin, when the microprocessor 110 sends a high level signal to the RF contirl pin, the analog switch 120 is in an on state, and when the microprocessor 110 sends a low level signal to the RF contirl pin, the analog switch 120 is in an off state.
Referring to fig. 3, according to an embodiment of the present disclosure, the NFC antenna module 140 includes an active NFC antenna 142 and an NFC chip 141;
the microprocessor 110 is electrically connected with the NFC chip 141;
the active NFC antenna 142 is electrically connected to the NFC chip 141;
the active NFC antenna 142 is configured to send the NFC magnetic flux signal and receive a communication signal in a magnetic field, and the NFC chip 141 is configured to receive communication data returned by the active NFC antenna 142.
Specifically, as shown in fig. 3, the active NFC antenna 142 is electrically connected to the NFC chip 141 through an RXN pin and an RXP pin, and the NFC chip 141 is electrically connected to the microprocessor 110 through an 5729RST _ POR pin, an 5729IRQ pin, an 5729CLK pin, and an 5729DIO pin, so that the NFC chip 141 can receive the magnetic field communication signal transmitted back by the active NFC antenna 142 from the RXN pin and the RXP pin and transmit the magnetic field communication signal to the microprocessor 110 through the 5729RST _ POR pin, the 5729IRQ pin, the 5729CLK pin, and the 5729DIO pin, so that the microprocessor 110 performs a corresponding signal amplification command.
Further, the NFC chip 141 includes a CLF (contact Front-End, abbreviated as Contactless Front-End) structure, a power amplifier, and a Booster structure, where the main function of the Contactless Front-End module is to output an analog signal, and the main functions of the power amplifier and the Booster structure are to perform information correction and amplification on the analog signal.
Specifically, the fourth capacitor is C10, the capacitance value of C10 is preferably 56 picofarads, the fifth capacitor is C11, the capacitance value of C11 is preferably 56 picofarads, and the active NFC antenna 142 includes a fourth capacitor, a third filter circuit, a signal transmitting circuit, a fourth filter circuit, and a fifth capacitor that are sequentially connected in series;
the fourth capacitor and the fifth capacitor are used for receiving communication signals in the NFC magnetic field and transmitting the communication signals back to the NFC chip 141;
the signal transmitting circuit comprises a third inductor, a first resistor, a sixth capacitor and a seventh capacitor which are connected in parallel;
the third filter circuit comprises an eighth capacitor and a ninth capacitor which are connected in parallel, and the fourth filter circuit comprises a tenth capacitor and an eleventh capacitor which are connected in parallel. The eighth capacitor and the ninth capacitor are respectively C21 and C17, the tenth capacitor and the eleventh capacitor are respectively C18 and C19, and the capacitance values of C17, C18, C19 and C21 are all preferably 100 picofarads.
As shown in fig. 3, the sixth capacitor is C13, the capacitance value of C13 is preferably 100 picofarads, the seventh capacitor is C12, the capacitance value of C12 is preferably 27 picofarads, the third inductor is ANT1, the first resistor is R5, and the resistance value of R5 is 1 kiloohm. The active NFC antenna 142 includes a fourth capacitor, a third filter circuit, a signal transmission circuit, a fourth filter circuit, and a fifth capacitor connected in series in sequence, where the signal transmission circuit is configured to transmit an NFC magnetic flux signal output by the NFC chip 141 and form an NFC communication magnetic field with a receiving terminal, and both the sixth capacitor and the seventh capacitor in the signal transmission circuit are configured to store a magnetic field wave received in a communication process and store energy to serve as a signal source of the signal transmission circuit.
The first inductor and the second inductor in the signal amplifier 130 and the third inductor ANT1 in the signal transmitting circuit form a coupling effect, that is, the NFC magnetic flux signal transmitted by the signal transmitting circuit is amplified, so that the communication stability with the receiving terminal is improved.
In addition, the third filter circuit includes an eighth capacitor and a ninth capacitor connected in parallel, and the fourth filter circuit includes a tenth capacitor and an eleventh capacitor connected in parallel, and preferably, the eighth capacitor, the ninth capacitor, the tenth capacitor and the eleventh capacitor are all capacitance elements having a capacitance value of 100 picofarads.
Referring to fig. 4a and 4b, according to a specific embodiment of the present disclosure, the system further includes a secure chip 150;
the secure chip 150 is electrically connected to the microprocessor 110, and the secure chip 150 is used for storing the NFC tag signal received by the mobile terminal.
Preferably, the model of the secure chip 150 includes at least one of THD89_ DIE and CIU98M25, the secure chip 150 functions to store and process encrypted data in the microprocessor 110, and the preset NFC tag signal may be an NFC tag stored in the secure chip 150 and entered by a user through the NFC chip 141 in advance.
According to a specific embodiment of the present disclosure, the system further includes a SIM contact chip 160, and the SIM contact chip 160 is electrically connected to the microprocessor 110.
The SIM contact chip 160 is used for contacting with a SIM card, receiving NFC tag information stored in the SIM card, and sending the NFC tag information to the microprocessor 110 through the SIM contact chip 160. The preset NFC tag information may be NFC tag information stored in the SIM card.
According to a specific embodiment of the present disclosure, the system further includes a wireless communication module 170;
the wireless communication module 170 is electrically connected to the microprocessor 110;
the wireless communication module 170 includes at least one of a BLE (Bluetooth Low Energy) module, a 4G signal, and a 5G signal.
As shown in fig. 4a and 4b, the NFC-SIM system 100 further includes a crystal circuit 180 and a power supply 190, the crystal circuit 180 is electrically connected to the microprocessor 110, and the crystal circuit 180 is configured to generate an alternating current signal having a preset frequency and being stable, and send the alternating current signal to the microprocessor 110 so that the microprocessor 110 can execute a corresponding instruction.
The power supply 190 is configured to supply power to each chip in the above embodiment, preferably, an output end of the power supply 190 may further be connected to a power management chip, and an output end of the power management chip is electrically connected to each chip in the above embodiment, so as to ensure that electric energy is stably supplied to each chip.
Referring to fig. 5, an embodiment of the present disclosure further provides an NFC-SIM control method applied to the NFC-SIM system 100, where when the microprocessor 110 starts an NFC function, the method includes:
s501, extracting preset NFC label information;
when the microprocessor 110 starts the NFC function, the microprocessor 110 extracts the pre-stored NFC tag information from the security chip 150 or the SIM card, and sends the NFC tag information to the NFC antenna module 140.
S502, transmitting the NFC tag information to the NFC antenna module 140;
the microprocessor 110 sends the NFC tag information to the NFC antenna module 140, so that the NFC chip 141 in the NFC antenna module 140 performs preset processing on the tag information, converts the tag information into an NFC magnetic flux signal, and sends the NFC magnetic flux signal through the active NFC antenna 142 in the NFC antenna module 140 to form an NFC communication magnetic field with a receiving terminal.
S503, receiving NFC magnetic field communication information sent by the NFC chip 141;
after the active NFC antenna 142 and the receiving terminal form an NFC communication magnetic field, the active NFC antenna 142 may receive the magnetic field communication signal and send the communication signal to the NFC chip 141, and the NFC chip 141 sends the communication signal to the microprocessor 110 to start an NFC signal amplification function.
S504, controlling the analog switch 120 to be turned on to amplify the NFC magnetic flux signal sent by the NFC antenna module;
after receiving the NFC magnetic field communication information, the microprocessor 110 sends a high level signal to the analog switch 120 through the RF control pin, and controls the analog switch 120 to be turned on, so that the signal amplifier 130 starts to operate, and a coupling amplification effect is formed between the signal amplifier 130 and the active NFC antenna 142, so as to amplify the NFC magnetic flux signal sent by the active NFC antenna 142, thereby improving the signal strength of the NFC magnetic flux signal and ensuring stable communication between the NFC magnetic fields.
And S505, controlling the analog switch 120 to be closed when the NFC function completion instruction is received.
When the microprocessor 110 receives the NFC function completion instruction, it sends a low level signal to the analog switch 120 through an RF control pin, and controls the analog switch 120 to turn off, so as to stop the operation of the signal amplifier 130, thereby preventing the signal amplifier 130 and the active NFC antenna 142 from being continuously coupled to affect the signal strength of signals such as bluetooth signals, 4G signals, and 5G signals.
Referring to fig. 6, an embodiment of the present disclosure further provides a mobile terminal including the NFC-SIM system 100, where the specific structure refers to the above description, and is not described herein again.
In summary, the embodiments of the present disclosure provide an NFC-SIM system, a control method, and a mobile terminal, which amplify signal strength of a magnetic flux signal emitted by an active NFC antenna through a coupling effect between the active NFC antenna and the passive coupled signal amplifying circuit, so as to ensure that magnetic field communication with a receiving terminal can be stably performed. And the microprocessor can regulate and control the coupling signal amplifying circuit, so that stable NFC communication connection between the NFC-SIM system and the receiving terminal can be ensured, the signal intensity of other communication signals in the system can be prevented from being influenced, and the use experience of a user is greatly improved.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, each functional module or unit in each embodiment of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part of the technical solution that contributes to the prior art in essence can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (10)
1. An NFC-SIM system is characterized by comprising a microprocessor, an NFC antenna module, an analog switch and a signal amplifier, wherein the signal amplifier comprises a first inductor and a second inductor, and the first inductor and the second inductor are both onboard coils;
the microprocessor is electrically connected with the communication end of the NFC antenna module, the microprocessor is electrically connected with the control end of the analog switch, and a first contact and a second contact of the analog switch are respectively electrically connected with two ends of the signal amplifier;
the microprocessor controls the NFC antenna module to convert preset NFC label information into an NFC magnetic flux signal, the microprocessor receives NFC magnetic field communication information sent by a communication end of the NFC antenna module, and the microprocessor controls the signal amplifier through the analog switch so that a first inductor and a second inductor in the signal amplifier are coupled with a third inductor in the NFC antenna module to amplify the NFC magnetic flux signal sent by the NFC antenna module.
2. The system of claim 1, wherein the signal amplifier comprises a first capacitor, a first inductor and a second inductor connected in series in sequence;
a first contact of the analog switch is electrically connected with the first capacitor;
and the second contact of the analog switch is electrically connected with the second inductor.
3. The system of claim 2, wherein the signal amplifier further comprises a first filtering branch and a second filtering branch;
the first filtering branch circuit comprises a second capacitor, one end of the second capacitor is connected to the first contact of the analog switch, and the other end of the second capacitor is grounded;
the second filtering branch circuit comprises a third capacitor, one end of the third capacitor is connected to the second contact of the analog switch, and the other end of the third capacitor is grounded.
4. The system of claim 1, wherein the NFC antenna module comprises an active NFC antenna and an NFC chip, the active NFC antenna being electrically connected to the NFC chip;
the microprocessor is electrically connected with the NFC chip;
the active NFC antenna is used for sending the NFC magnetic flux signal and receiving a communication signal in a magnetic field, and the NFC chip is used for receiving communication data sent back by the active NFC antenna.
5. The system of claim 4, wherein the active NFC antenna comprises a fourth capacitor, a third filter circuit, a signal transmitting circuit, a fourth filter circuit, and a fifth capacitor connected in series in that order;
the fourth capacitor and the fifth capacitor are used for receiving communication signals in an NFC magnetic field and transmitting the communication signals back to the NFC chip;
the signal transmitting circuit comprises a third inductor, a first resistor, a sixth capacitor and a seventh capacitor which are connected in parallel;
the third filter circuit comprises an eighth capacitor and a ninth capacitor which are connected in parallel, and the fourth filter circuit comprises a tenth capacitor and an eleventh capacitor which are connected in parallel.
6. The system of claim 1, further comprising a secure chip;
the safety chip is electrically connected with the microprocessor and used for storing the NFC label signal received by the mobile terminal.
7. The system of claim 1, further comprising a SIM contact chip, the SIM contact chip being electrically connected to the microprocessor.
8. The system of claim 1, further comprising a wireless communication module;
the wireless communication module is electrically connected with the microprocessor;
the wireless communication module comprises at least one of a Bluetooth module, a 4G signal and a 5G signal.
9. An NFC-SIM control method, applied to the NFC-SIM system of any one of claims 1 to 8, when the microprocessor starts the NFC function, the method comprising:
extracting preset NFC label information;
transmitting the NFC label information to an NFC antenna module;
receiving NFC magnetic field communication information sent by the NFC antenna module;
controlling the analog switch to be conducted so that the signal amplifier amplifies the NFC magnetic flux signal sent by the NFC antenna module;
and when an NFC function completion instruction is received, controlling the analog switch to be closed.
10. A mobile terminal characterized in that it comprises a NFC-SIM system according to any one of the preceding claims 1 to 8.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202551031U (en) * | 2012-03-23 | 2012-11-21 | 惠州Tcl移动通信有限公司 | NFC (near field communication) terminal capable of increasing NFC communication distance |
| CN203967240U (en) * | 2013-12-31 | 2014-11-26 | 惠州比亚迪实业有限公司 | A kind of mobile terminal |
| WO2017149526A2 (en) * | 2016-03-04 | 2017-09-08 | May Patents Ltd. | A method and apparatus for cooperative usage of multiple distance meters |
| CN109191115A (en) * | 2018-08-16 | 2019-01-11 | 北京倍胜智能科技有限公司 | A kind of active NFC transaction change journey communication mode structure |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8249524B2 (en) * | 2010-09-10 | 2012-08-21 | Texas Instruments Incorporated | Transmit and receive performance of a near field communication device that uses a single antenna |
| US9773241B2 (en) * | 2012-11-06 | 2017-09-26 | Intel Corporation | Dynamic boost of near field communications (NFC) performance/coverage in devices |
| CN203894547U (en) * | 2013-10-24 | 2014-10-22 | 航天信息股份有限公司 | Intelligent watch with function of mobile payment |
| CN203630800U (en) * | 2013-12-02 | 2014-06-04 | 上海分众软件技术有限公司 | Near-field communication tag equipment |
| US9788274B2 (en) * | 2015-08-18 | 2017-10-10 | Wilson Electronics, Llc | Wireless device signal amplifier |
| CN106650880A (en) * | 2016-12-23 | 2017-05-10 | 上海励识电子科技有限公司 | IC card signal amplifying circuit and IC card adopting circuit |
| CN111835903B (en) * | 2019-03-26 | 2022-03-11 | 华为技术有限公司 | Method for rapidly distributing data in NFC label and electronic equipment |
| US10892800B1 (en) * | 2020-01-06 | 2021-01-12 | Nucurrent, Inc. | Systems and methods for wireless power transfer including pulse width encoded data communications |
-
2021
- 2021-04-09 CN CN202110380654.1A patent/CN112803958B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202551031U (en) * | 2012-03-23 | 2012-11-21 | 惠州Tcl移动通信有限公司 | NFC (near field communication) terminal capable of increasing NFC communication distance |
| CN203967240U (en) * | 2013-12-31 | 2014-11-26 | 惠州比亚迪实业有限公司 | A kind of mobile terminal |
| WO2017149526A2 (en) * | 2016-03-04 | 2017-09-08 | May Patents Ltd. | A method and apparatus for cooperative usage of multiple distance meters |
| CN109191115A (en) * | 2018-08-16 | 2019-01-11 | 北京倍胜智能科技有限公司 | A kind of active NFC transaction change journey communication mode structure |
Non-Patent Citations (1)
| Title |
|---|
| Tarciso A. Martins.A Programmable Gain Amplifier for Load Demodulation Channel in an NFC Reader Chip.《2018 31st Symposium on Integrated Circuits and Systems Design (SBCCI)》.2018,全文. * |
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Denomination of invention: Nfc-sim system, control method and mobile terminal Effective date of registration: 20210924 Granted publication date: 20210803 Pledgee: Bank of Chengdu science and technology branch of Limited by Share Ltd. Pledgor: SICHUAN KEDAO XINGUO INTELLIGENT TECHNOLOGY Co.,Ltd. Registration number: Y2021510000231 |