CN206564594U - A kind of multiple antennas near-field communication modulation-demodulation device and dynamic token - Google Patents
A kind of multiple antennas near-field communication modulation-demodulation device and dynamic token Download PDFInfo
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- CN206564594U CN206564594U CN201720300728.5U CN201720300728U CN206564594U CN 206564594 U CN206564594 U CN 206564594U CN 201720300728 U CN201720300728 U CN 201720300728U CN 206564594 U CN206564594 U CN 206564594U
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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
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- 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
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Abstract
The utility model is applied to near-field communication field there is provided a kind of multiple antennas near-field communication modulation-demodulation device and dynamic token, and the device includes multiple near field antennas and an at least near-field communication modulation-demodulation circuit, and the circuit includes：Detection unit and load modulating unit, load modulating unit label receive data when be off state so that increase near field antenna equiva lent impedance realize it is anti-interference；The rectifier terminal of the current input terminal and detection unit that load modulating unit is connected, and the input/output interface of the control end and process chip that load modulating unit is connected, and loads the signal sending end of modulating unit and the signal sending end of process chip is connected.The utility model controls load to be modulated at when near field antenna does not communicate and do not take energy by on-off circuit, it is ensured that separate between near-field communication aerial, it is to avoid interfere with each other, power consumption is reduced simultaneously, because the device is built using discrete device, is encapsulated small, cost is low, and debugging is simple.
Description
Technical field
The utility model belongs to near-field communication field, more particularly to a kind of multiple antennas near-field communication modulation-demodulation device, dynamic
State token, contact type intelligent card, digital signature device and near field communication tag.
Background technology
Near-field communication technology (Near Field Communication, NFC) is recognized (RFID) by non-contact radio-frequency
And interconnect Technology Integration differentiation, current near-field communication by as the international standards of ISO/IEC IS 18092,
ECMA-340 standards and the standards of ETSI TS 102 190.NFC is using actively and passively two kinds of read modes.Near-field communication technology
Combining induction read write line, icah wavw and point-to-point function on one chip, can be in short distance and compatible equipment
It is identified and data exchange.
Complete, but work as in the modulation-demodulation technique of near field communication usually using integrated NFC communication chip at present
When there are multiple near field antennas on circuit boards, there is severe jamming between the communication on circuit board, it is impossible to carry out valid data biography
It is defeated, and because the production cycle of NFC communication chip is longer, chip interface is also more, also results in the mistake of near-field communication realization
Journey exchange method is complicated, the problem of product power consumption is big.
Utility model content
The purpose of the utility model embodiment is to provide a kind of multiple antennas near-field communication modulation-demodulation circuit, it is intended to solve
The problem of interference being produced on available circuit plate during multiple near field antenna communications.
The utility model embodiment is achieved in that a kind of multiple antennas near-field communication modulation-demodulation device, described device
Include multiple near field antennas and at least a near-field communication modulation-demodulation circuit, the near-field communication modulation-demodulation circuit is connected to
Between the first near field antenna and process chip in the multiple near field antenna, first near field antenna include near field coil and
Matching capacitance C1, the circuit includes：
The carrier wave in the modulated signal that read write line is sent is filtered out, to retain the envelope waveform of modulation intelligence and be sent to described
Process chip carries out the detection unit of back-end processing；
By controlling the load change of the near field coil to carry out load modulation and sending the negative of modulated signal to read write line
Modulating unit is carried, the load modulating unit is off state when label receives data, so as to increase by the first near field antenna
Equiva lent impedance is realized anti-interference；
The input of the detection unit is connected with first near field antenna, the output end of the detection unit with it is described
The signal receiving end connection of process chip；
The current input terminal of the load modulating unit is connected with the rectifier terminal of the detection unit, and the load modulation is single
The current output terminal ground connection of member, the control end of the load modulating unit is connected with the input/output interface of the process chip,
The signal sending end of the load modulating unit is connected with the signal sending end of the process chip.
In said structure, the load modulating unit is on-off circuit module；
The current input terminal of the on-off circuit module is the first end of the load modulating unit, the on-off circuit mould
The current output terminal ground connection of block, the first control end of the on-off circuit module is the second end of the load modulating unit, institute
State threeth end of the second control end of on-off circuit module for the load modulating unit.
In said structure, the load modulating unit also includes：
Load control module, the first end of the load control module is the first end for loading modulating unit, described
Second end of load control module is connected with the current input terminal of the on-off circuit module.
In said structure, the on-off circuit module includes：
First switch pipe and resistance R1；
The current input terminal of the first switch pipe is the current input terminal of the on-off circuit module, the first switch
The current output terminal of pipe is the current output terminal of the on-off circuit module, and the control end of the first switch pipe is the switch
First control end of circuit module is connected with one end of the resistance R1, and the other end of the resistance R1 is the on-off circuit mould
Second control end of block；
Or, the on-off circuit module includes：
Second switch pipe and the 3rd switching tube；
The current input terminal of the second switch pipe is the current input terminal of the on-off circuit module, the second switch
The current output terminal of pipe is the current output terminal of the on-off circuit module, the control end of the second switch pipe and the described 3rd
The current output terminal connection of switching tube, the current input terminal of the 3rd switching tube controls for the first of the on-off circuit module
End, the control end of the 3rd switching tube is the second control end of the on-off circuit module；
Or, the on-off circuit module includes：
4th switching tube, the current input terminal of the 4th switching tube inputs for the electric current of the on-off circuit module simultaneously
End and the first control end, the control end of the 4th switching tube are the second control end of the on-off circuit module, the described 4th
The current output terminal of switching tube is the current output terminal of the on-off circuit module.
In said structure, the load control module is respectively the load control for resistance R4, the resistance R4 two ends
The first end of molding block and the second end；
Or, the load control module includes：
Resistance R6 and electric capacity C3；
The resistance R6 is in parallel with the electric capacity C3, and two common ports in parallel are respectively the first of the load control module
End and the second end.
In said structure, the near-field communication modulation-demodulation circuit is realized by discrete device.
The another object of the utility model embodiment is to include above-mentioned multiple antennas near-field communication modulation /demodulation there is provided one kind
The dynamic token of device.
The another object of the utility model embodiment is to include above-mentioned multiple antennas near-field communication modulation /demodulation there is provided one kind
The contact type intelligent card of device.
The another object of the utility model embodiment is to include above-mentioned multiple antennas near-field communication modulation /demodulation there is provided one kind
The digital signature device of device.
The another object of the utility model embodiment is to include above-mentioned multiple antennas near-field communication modulation /demodulation there is provided one kind
The near field communication tag of device.
The utility model embodiment controls load to be modulated at when near field antenna does not communicate and does not take energy by on-off circuit, guarantor
Demonstrate,proved separate between near-field communication aerial, it is to avoid interfere with each other, while reduce power consumption, due to the device using point
Vertical device is built, and encapsulation is small, and cost is low, and debugging is simple.
Brief description of the drawings
The structure chart for the multiple antennas near-field communication modulation-demodulation device that Fig. 1 provides for the utility model embodiment；
The exemplary circuit for the multiple antennas near-field communication modulation-demodulation device that Fig. 2 provides for the utility model first embodiment
Figure；
The exemplary circuit for the multiple antennas near-field communication modulation-demodulation device that Fig. 3 provides for the utility model second embodiment
Figure；
The exemplary circuit for the multiple antennas near-field communication modulation-demodulation device that Fig. 4 provides for the utility model 3rd embodiment
Figure.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.In addition, institute in each embodiment of the utility model disclosed below
As long as the technical characteristic being related to does not constitute conflict and can be just mutually combined each other.
The utility model embodiment controls load to be modulated at when near field antenna does not communicate and does not take energy by on-off circuit, guarantor
Demonstrate,proved separate between near-field communication aerial, it is to avoid interfere with each other, while reduce power consumption, due to the device using point
Vertical device is built, and encapsulation is small, and cost is low, and debugging is simple.
Fig. 1 shows the structure for the multiple antennas near-field communication modulation-demodulation device that the utility model first embodiment is provided,
For convenience of description, it illustrate only the part related to the utility model.
As the embodiment of the utility model one, the multiple antennas near-field communication modulation-demodulation device can apply to various near fields
, should in the dynamic token that is particularly suitable for use in, contact type intelligent card, digital signature device and near field communication tag in telecommunication circuit
Multiple antennas near-field communication modulation-demodulation device includes multiple near field antennas and at least a near-field communication modulation-demodulation circuit, near field
Communication modulation demodulator circuit is connected between the first near field antenna in multiple near field antennas and process chip MCU, the first near field
Antenna includes near field coil 2 and matching capacitance C1, and circuit includes：
The carrier wave in the modulated signal that read write line is sent is filtered out, to retain the envelope waveform of modulation intelligence and be sent to processing
Chip carries out the detection unit 100 of back-end processing；
Adjusted by the load for controlling the load change of near field coil to carry out load modulation and send modulated signal to read write line
Unit 13 processed, load modulating unit 13 is off state when label receives data, so that it is equivalent to increase by the first near field antenna
Impedance is realized anti-interference；
The input of detection unit 100 is connected with the first near field antenna, the output end and process chip of detection unit 100
MCU signal receiving end RX connections；
The current input terminal of load modulating unit 13 is connected with the rectifier terminal of detection unit 100, load modulating unit 13
Current output terminal is grounded, and the control end of load modulating unit 13 is connected with process chip MCU input/output interface, load modulation
The signal sending end of unit 13 is connected with process chip MCU signal sending end TX.
Preferably, load modulating unit 13 is on-off circuit module 131；
The current input terminal of on-off circuit module 131 is the first end of load modulating unit 13, on-off circuit module 131
Current output terminal is grounded, and the first control end of on-off circuit module 131 is the second end of load modulating unit 13, on-off circuit mould
Second control end of block 131 is the 3rd end of load modulating unit 13.
More preferably, load modulating unit 13 also includes：
Load control module 132, the first end of load control module 132 is the first end of load modulating unit 13, load
Second end of control module 132 is connected with the current input terminal of on-off circuit module 131.
As the embodiment of the utility model one, communications pins can be passed through by loading the second end and the 3rd end of modulating unit 13
Interface TX, RX and process chip MCU connections, can also be connected by rear end match circuit with process chip MCU.
In the utility model embodiment, label B is in reception state, the on-off circuit module in load modulating unit 13
131 are off state, and near field antenna equiva lent impedance is very big, the electric current very little passed through, keep low power consumpting state, hardly consume
RF energy.When having a variety of near field coils on same device or circuit board, label B hardly disappears in reception state
RF energy is consumed, so that avoid influences on other communication coils.
In the utility model embodiment, read write line A is toward label B write information.There is provided carrier wave letter in communication by read write line A
Number.During transmission, carrier wave is modulated by ASK (amplitude shift key modulation) or OOK (on-off keying) according to information is sent, in addition
It is not exclusively by adjusting carrier frequency, by deviateing the matching frequency of coil, the equivalent effect of amplitude modulation(PAM) is reached indirectly.Send
Information can be existing standard interface signal, such as UART, IIC, SPI, single wire transmission agreement etc. or customized
The signal of the modulation formats such as frequency modulation, the amplitude modulation of low speed, can be square wave, sine wave, triangular wave or waveform customization.
Label B obtains the waveform of former modulated signal after carrier wave is filtered, and rear end MCU is output to by communications pins interface
The chips such as MCU are connected to etc. processing of circuit, or by rear end match circuit.If modulated signal is existing standard interface
The signal of signal, such as UART, can be directly connected to the hardware UART interface of the circuits such as rear end MCU, so that communication mode is simplified,
Reach the effect of transparent transmission.
Read write line A reads information from label B.There is provided carrier signal in communication by read write line A.It is non-to meet front end B when reading information,
Coil equivalent load is modulated by ASK (amplitude shift key modulation) or OOK (on-off keying) according to information is sent.Send
Information can be existing standard interface signal, such as UART, IIC, SPI, single wire transmission agreement etc. or customized low
The signal of the modulation formats such as frequency modulation, the amplitude modulation of speed, can be square wave, sine wave, triangular wave or waveform customization.If modulation
Signal is existing standard interface signal, such as UART signal, and the hardware UART interface TX signals of the circuit such as rear end MCU can be straight
The TX of label B front end is connected to, so as to simplify communication mode, the effect of transparent transmission is reached.
The utility model embodiment controls load to be modulated at when near field antenna does not communicate and does not take energy by on-off circuit, guarantor
Demonstrate,proved separate between near-field communication aerial, it is to avoid interfere with each other, while reduce power consumption, due to the device using point
Vertical device is built, and encapsulation is small, and cost is low, and debugging is simple.
Fig. 2 shows the structure for the multiple antennas near-field communication modulation-demodulation device that the utility model second embodiment is provided,
For convenience of description, it illustrate only the part related to the utility model.
As the embodiment of the utility model one, detection unit 100 includes：
One-way conduction unit 11 and filter unit 12；
The input of one-way conduction unit 11 is the input of detection unit 100, and the output end of one-way conduction unit 11 is
The rectifier terminal of detection unit 100 is connected with the input of filter unit 12, and the output end of filter unit 12 is detection unit 100
Output end.
What deserves to be explained is, detection unit 100 can also only include filter unit 12, and unidirectional letter is needed in filter unit 12
Number when, one-way conduction unit 11 can be set in detection unit 100, signal is first passed through one-way conduction unit 11 and export unidirectionally
Filter unit 12 is given to after signal.
It is of course also possible to use itself is the filter unit 12 containing one-way conduction function, now can in detection unit 100
Not include one-way conduction unit 11.
Or, the realization of filter unit 12 need not limit polarity, now, can not also be set in detection unit 100
Put one-way conduction unit 11.
When being not provided with one-way conduction unit 11, if the filtered waveform of filter unit 12 has positive negative part, it can pass through
Rear end matching unit or MCU interface processing positive-negative polarity match reception by way of Differential Input.
More preferably, filter unit 12 can also include：
Resistance R5, electric capacity C4 and inductance L1；
Electric capacity C4 one end is the input of filter unit 12, and the electric capacity C4 other end leads to for the output end of filter unit 12
Resistance R5 ground connection is crossed, inductance L1 is in parallel with electric capacity C4.
Specifically, on-off circuit module 131 includes：
4th switching tube Q4, the 4th switching tube Q4 current input terminal input for the electric current of on-off circuit module 131 simultaneously
End and the first control end, the 4th switching tube Q4 control end are the second control end of on-off circuit module 131, the 4th switching tube Q4
Current output terminal be on-off circuit module 131 current output terminal.
As the embodiment of the utility model one, one-way conduction unit 11 can again diode or other can play unidirectionally
Equivalent devices or circuit realiration that the components such as metal-oxide-semiconductor, the triode of conducting effect are constituted.
Specifically, one-way conduction unit 11 is diode D1, and diode D1 anode is the input of one-way conduction unit 11
End, diode D1 negative electrode is the output end of one-way conduction unit 11.
In the utility model embodiment, process chip MCU GPIO port can be set to open-drain output, by handling
The switch of chip MCU controlling switch pipes, can change the load of near field coil, near field coil is born by the switch switching of switching tube
The transmit coil at read write line end can be coupled to by carrying change, and the transmit coil load change that read write line passes through can demodulate modulation letter
Breath.
In the utility model embodiment, on-off circuit module 131 is made up of metal-oxide-semiconductor Q4, is constituted on-off circuit, is passed through
The switch switching of metal-oxide-semiconductor can change the load of coil, and coil load change can be coupled to the transmit coil at read write line end, read and write
The transmit coil load change that device passes through can demodulate modulation intelligence.
Read write line A is toward label B write information；
There is provided carrier signal in communication by read write line A.During transmission, GPIO is arranged to export low level, keeps the 4th to switch
Pipe Q4 off states, read write line modulated signal is the UART signal of standard, is modulated by OOK.The non-front end B that connects is filtering carrier wave
Afterwards, the waveform of former modulated signal is obtained, the processing of circuit such as rear end MCU are output to by communication interface pin.Modulated signal is mark
Accurate UART signal, is directly connected to the hardware UART interface of the circuits such as rear end MCU, reaches the effect of transparent transmission.
Read write line A reads information from label B；
There is provided carrier signal in communication by read write line A.When reading information, label B passes through OOK modulation lines according to information is sent
Enclose equivalent load.Modulated signal is the UART signal of standard, and the hardware UART interface TX signals of the circuit such as rear end MCU can be direct
The non-TX for meeting front end B is connected to, the effect of transparent transmission is reached.GPIO is arranged to input and does not control the 4th switching tube Q4, is controlled completely by TX
Make the 4th switching tube Q4 break-make.TX sends high level and turns on the 4th switching tube Q4, antenna ends voltage by diode D1 and
Resistance R4 discharges, and reduces voltage amplitude.TX sends low level and turns off the 4th switching tube Q4, and antenna ends can only pass through diode
D1, resistance R2, resistance R3 loops, resistance R2 and resistance R3 resistance values are very big, antenna ends voltage amplitude value are kept, so as to constitute
One ohmic load modulation circuit.
The utility model embodiment controls load to be modulated at when near field antenna does not communicate and does not take energy by on-off circuit, guarantor
Demonstrate,proved separate between near-field communication aerial, it is to avoid interfere with each other, while reduce power consumption, due to the device using point
Vertical device is built, and encapsulation is small, and cost is low, and debugging is simple.
Fig. 3 shows the structure for the multiple antennas near-field communication modulation-demodulation device that the utility model 3rd embodiment is provided,
For convenience of description, it illustrate only the part related to the utility model.
As the embodiment of the utility model one, filter unit 12 includes：
Resistance R2 and electric capacity C2；
Resistance R2 one end is connected for the input of filter unit 12 with electric capacity C2 one end, and electric capacity C2 one end is filtering
The output end of unit 12, the resistance R2 other end is grounded simultaneously with the electric capacity C2 other end.
Alternatively, the near-field communication modulation-demodulation circuit can also include：
Resistance R3 for controlling load, resistance R3 one end is connected with the output end of one-way conduction module 11, resistance R3
The other end be connected with the input of filtration module 12.
Specifically, on-off circuit module 131 includes：
First switch pipe Q1 and resistance R1；
First switch pipe Q1 current input terminal is the current input terminal of on-off circuit module 131, first switch pipe Q1's
Current output terminal is the current output terminal of on-off circuit module 131, and first switch pipe Q1 control end is on-off circuit module 131
The first control end be connected with resistance R1 one end, the resistance R1 other end is the second control end of on-off circuit module 131.
Load control module 132 includes：
Resistance R4；
Resistance R4 two ends are respectively first end and the second end of load control module 132.
In the utility model embodiment, in order to prevent false triggering, load switch is controlled by TX and GPIO simultaneously, and adopt
With two switching tubes, pass through two on off state control load modulation.
The utility model embodiment controls load to be modulated at when near field antenna does not communicate and does not take energy by on-off circuit, guarantor
Demonstrate,proved separate between near-field communication aerial, it is to avoid interfere with each other, while reduce power consumption, due to the device using point
Vertical device is built, and encapsulation is small, and cost is low, and debugging is simple.
Fig. 4 shows the structure for the multiple antennas near-field communication modulation-demodulation device that the utility model fourth embodiment is provided,
For convenience of description, it illustrate only the part related to the utility model.
As the embodiment of the utility model one, on-off circuit module 131 includes：
Second switch pipe Q2 and the 3rd switching tube Q3；
Second switch pipe Q2 current input terminal is the current input terminal of on-off circuit module 131, second switch pipe Q2's
Current output terminal is the current output terminal of on-off circuit module 131, and second switch pipe Q2 control end is with the 3rd switching tube Q3's
Current output terminal is connected, and the 3rd switching tube Q3 current input terminal is the first control end of on-off circuit module 131, the 3rd switch
Pipe Q3 control end is the second control end of on-off circuit module 131.
Load control module 132 includes：
Resistance R6 and electric capacity C3；
Resistance R6 is in parallel with electric capacity C3, and two common ports in parallel are respectively the first end and second of load control module 132
End.
What deserves to be explained is, the near-field communication modulation-demodulation circuit in above-described embodiment can be real by discrete device
It is existing, it can also be either partially or completely integrated in process chip.
Individually it is physically present, can also separates in addition, the unit or device in above-described embodiment can be units
Set, can partly be realized, be partly integrated in chip using discrete device, or multiplexing part resistance, electric capacity, electricity in the chips
Sense, switching device etc..For example, the resistance in above-described embodiment can pass through MCU interfaces or the equivalent inpnt of rear end part circuit
Impedance is substituted, and electric capacity can be caused by equivalent input capacitance or PCB (circuit board) wiring of MCU interfaces or rear end part circuit
Distribution capacity, or component parasitic capacitance (body capacitance between such as metal-oxide-semiconductor grid drain electrode) in itself substitutes.Inductance is also possible to
There is equivalent inductance caused by PCB (circuit board) wirings, component is substituted in the equivalent inductive reactance that some frequency range is presented.
And above-mentioned functions unit can both be realized by the way of hardware, it would however also be possible to employ the form of SFU software functional unit
Realize.
The utility model embodiment controls load to be modulated at when near field antenna does not communicate and does not take energy by on-off circuit, guarantor
Demonstrate,proved separate between near-field communication aerial, it is to avoid interfere with each other, while reduce power consumption, due to the device using point
Vertical device is built, and encapsulation is small, and cost is low, and debugging is simple.
The another object of the utility model embodiment is to include above-mentioned multiple antennas near-field communication modulation /demodulation there is provided one kind
The dynamic token of device.
The another object of the utility model embodiment is to include above-mentioned multiple antennas near-field communication modulation /demodulation there is provided one kind
The contact type intelligent card of device.
The another object of the utility model embodiment is to include above-mentioned multiple antennas near-field communication modulation /demodulation there is provided one kind
The digital signature device of device.
The another object of the utility model embodiment is to include above-mentioned multiple antennas near-field communication modulation /demodulation there is provided one kind
The near field communication tag of device.
Preferred embodiment of the present utility model is these are only, it is all in this practicality not to limit the utility model
Any modifications, equivalent substitutions and improvements made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (10)
1. a kind of multiple antennas near-field communication modulation-demodulation device, it is characterised in that described device include multiple near field antennas and
An at least near-field communication modulation-demodulation circuit, the near-field communication modulation-demodulation circuit is connected in the multiple near field antenna
Between first near field antenna and process chip, first near field antenna includes near field coil and matching capacitance C1, the circuit
Including：
The carrier wave in the modulated signal that read write line is sent is filtered out, to retain the envelope waveform of modulation intelligence and be sent to the processing
Chip carries out the detection unit of back-end processing；
Adjusted by the load for controlling the load change of the near field coil to carry out load modulation and send modulated signal to read write line
Unit processed, the load modulating unit is off state when label receives data, so that it is equivalent to increase by the first near field antenna
Impedance is realized anti-interference；
The input of the detection unit is connected with first near field antenna, the output end of the detection unit and the processing
The signal receiving end connection of chip；
The current input terminal of the load modulating unit is connected with the rectifier terminal of the detection unit, the load modulating unit
Current output terminal is grounded, and the control end of the load modulating unit is connected with the input/output interface of the process chip, described
The signal sending end of load modulating unit is connected with the signal sending end of the process chip.
2. device as claimed in claim 1, it is characterised in that the load modulating unit is on-off circuit module；
The current input terminal of the on-off circuit module is the first end for loading modulating unit, the on-off circuit module
Current output terminal is grounded, and the first control end of the on-off circuit module is second end for loading modulating unit, described to open
Close threeth end of the second control end of circuit module for the load modulating unit.
3. device as claimed in claim 2, it is characterised in that the load modulating unit also includes：
Load control module, the first end of the load control module is the first end of the load modulating unit, the load
Second end of control module is connected with the current input terminal of the on-off circuit module.
4. the device as described in any one of claim 2, it is characterised in that the on-off circuit module includes：
First switch pipe and resistance R1；
The current input terminal of the first switch pipe is the current input terminal of the on-off circuit module, the first switch pipe
Current output terminal is the current output terminal of the on-off circuit module, and the control end of the first switch pipe is the on-off circuit
First control end of module is connected with one end of the resistance R1, and the other end of the resistance R1 is the on-off circuit module
Second control end；
Or, the on-off circuit module includes：
Second switch pipe and the 3rd switching tube；
The current input terminal of the second switch pipe is the current input terminal of the on-off circuit module, the second switch pipe
Current output terminal is the current output terminal of the on-off circuit module, the control end of the second switch pipe and the described 3rd switch
The current output terminal connection of pipe, the current input terminal of the 3rd switching tube is the first control end of the on-off circuit module,
The control end of 3rd switching tube is the second control end of the on-off circuit module；
Or, the on-off circuit module includes：
4th switching tube, the current input terminal of the 4th switching tube current input terminal simultaneously for the on-off circuit module and
First control end, the control end of the 4th switching tube is the second control end of the on-off circuit module, the 4th switch
The current output terminal of pipe is the current output terminal of the on-off circuit module.
5. device as claimed in claim 3, it is characterised in that the load control module is resistance R4, the resistance R4's
Two ends are respectively first end and the second end of the load control module；
Or, the load control module includes：
Resistance R6 and electric capacity C3；
The resistance R6 is in parallel with the electric capacity C3, two common ports in parallel be respectively the load control module first end and
Second end.
6. such as device of the claim as described in claim any one of 1-5, it is characterised in that the near-field communication modulation /demodulation
Circuit is realized by discrete device.
7. a kind of dynamic token, it is characterised in that the dynamic token includes the multiple antennas as described in claim any one of 1-5
Near-field communication modulation-demodulation device.
8. a kind of contact type intelligent card, it is characterised in that the contact type intelligent card is included such as any one of claim 1-5
Described multiple antennas near-field communication modulation-demodulation device.
9. a kind of digital signature device, it is characterised in that the digital signature device is included as described in claim any one of 1-5
Multiple antennas near-field communication modulation-demodulation device.
10. a kind of near field communication tag, it is characterised in that the near field communication tag is included such as any one of claim 1-5 institutes
The multiple antennas near-field communication modulation-demodulation device stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720300728.5U CN206564594U (en) | 2017-03-24 | 2017-03-24 | A kind of multiple antennas near-field communication modulation-demodulation device and dynamic token |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720300728.5U CN206564594U (en) | 2017-03-24 | 2017-03-24 | A kind of multiple antennas near-field communication modulation-demodulation device and dynamic token |
Publications (1)
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| CN113780501A (en) * | 2021-09-17 | 2021-12-10 | 维沃移动通信有限公司 | Electronic device and control method |
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