CN106599971B - A kind of electronic tag power rectifier circuit - Google Patents
A kind of electronic tag power rectifier circuit Download PDFInfo
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- CN106599971B CN106599971B CN201611142363.4A CN201611142363A CN106599971B CN 106599971 B CN106599971 B CN 106599971B CN 201611142363 A CN201611142363 A CN 201611142363A CN 106599971 B CN106599971 B CN 106599971B
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- 238000003306 harvesting Methods 0.000 claims abstract description 33
- 230000005669 field effect Effects 0.000 claims description 72
- 239000003990 capacitor Substances 0.000 claims description 38
- 230000005611 electricity Effects 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 2
- 102100032533 ADP/ATP translocase 1 Human genes 0.000 description 16
- 101000768061 Escherichia phage P1 Antirepressor protein 1 Proteins 0.000 description 16
- 101000796932 Homo sapiens ADP/ATP translocase 1 Proteins 0.000 description 16
- 102100026396 ADP/ATP translocase 2 Human genes 0.000 description 15
- 101000718417 Homo sapiens ADP/ATP translocase 2 Proteins 0.000 description 15
- 238000000034 method Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 5
- 230000000087 stabilizing effect Effects 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0701—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management
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- H02J5/005—
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- H02J7/025—
Abstract
The embodiment of the invention provides a kind of electronic tag power rectifier circuits, it include: energy harvesting circuit, charging control circuit, power sense circuit, output electric capacity of voltage regulation, the first input end of the energy harvesting circuit is connected with first antenna, second input terminal is connected with the second antenna, and output end is connected with the input terminal of the charging control circuit；The first antenna and second antenna do not export high level simultaneously；The control terminal of the charging control circuit and the output end of the first antenna, second antenna, the power sense circuit are respectively connected with, and the output end of the charging control circuit is respectively connected with the first end of the output electric capacity of voltage regulation, supply voltage；The input terminal of the power sense circuit is connected with the second end of the output electric capacity of voltage regulation；The second end ground connection of the output electric capacity of voltage regulation.
Description
Technical field
The present invention relates to field of circuit technology more particularly to a kind of electronic tag power rectifier circuits.
Background technique
Rectification circuit is indispensable module in electronic tag, and rectification circuit provides stable DC source for chip.
Traditional rectification circuit generally comprises the parts such as rectifier bridge, high voltage stabilizing capacitor, voltage-regulating circuit, low pressure electric capacity of voltage regulation.By
Change in the AC voltage magnitudes that label obtains with apart from card reader distance (magnetic field strength), the DC voltage model of rectifier bridge output
Width is enclosed, the input voltage range of voltage-regulating circuit is required high.Complex circuit designs and circuit characteristic is with temperature, technique change
Greatly.
Current to optimize there are many scheme to label power source rectification circuit, groundwork concentrates on improving bridge rectifier electricity
Road efficiency and the input voltage range for improving voltage-regulating circuit, and then the performance of power rectifier circuit is improved, reduce chip face
Product improves circuit stability.However this kind improves and only circuit performance is optimized, and does not adjust to rectifier structure
It is whole.Rectification output is larger to flow-route and temperature dependence, and chip area is difficult to reduce.
As described above, common rectification circuit is affected by technique, work field strength and environment temperature etc., so that label power source
The design difficulty and complexity of rectification circuit are larger.For optimization bridge rectifier efficiency and improve voltage-regulating circuit input voltage
The improvement project of range, since the root problem that rectifier bridge output changes with field strength is not resolved.Improvement project is obtaining
Preferably generally require to increase design complexities and chip area in the case of rectification efficiency.
The information disclosed in the background technology section is intended only to increase the understanding to general background of the invention, without answering
When being considered as recognizing or imply that the information constitutes the prior art already known to those of ordinary skill in the art in any form.
Summary of the invention
In view of this, the technical problem to be solved by the present invention is to, how to provide it is a kind of it is low in energy consumption, area is small, technique robust
The good ultra high frequency IC tag power rectifier circuit of property.
In order to solve the above technical problems, the embodiment of the invention provides a kind of electronic tag power rectifier circuit, features
It is, comprising: energy harvesting circuit, charging control circuit, power sense circuit, output electric capacity of voltage regulation, the energy harvesting electricity
The first input end on road is connected with first antenna, and the second input terminal is connected with the second antenna, output end and charge control electricity
The input terminal on road is connected, and the energy harvesting circuit is used for from antenna acquisition electricity and charge transport is electric to the charge control
Road；The first antenna and second antenna do not export high level simultaneously；The control terminal of the charging control circuit with it is described
First antenna, second antenna, the power sense circuit output end be respectively connected with, the output of the charging control circuit
It holds and is respectively connected with the first end of the output electric capacity of voltage regulation, supply voltage, the charging control circuit is for controlling to described
The quantity of electric charge that output electric capacity of voltage regulation charges；The second of the input terminal of the power sense circuit and the output electric capacity of voltage regulation
End is connected, and the power sense circuit is for judging whether to charge to the output electric capacity of voltage regulation；The output pressure stabilizing electricity
The second end of appearance is grounded.
In one possible implementation, the output end of the energy harvesting circuit includes that the first output end and second are defeated
Outlet, the control terminal of the charging control circuit include the first control terminal and the second control terminal, the charging control circuit it is defeated
Entering end includes first input end and the second input terminal, the first output end and the charging control circuit of the energy harvesting circuit
First input end be connected, the second input terminal phase of the second output terminal of the energy harvesting circuit and the charging control circuit
Even；First control terminal of the charging control circuit and the output end of second antenna, the power sense circuit distinguish phase
Even；Second control terminal of the charging control circuit and the output end of the first antenna, the power sense circuit distinguish phase
Even.
In one possible implementation, the energy harvesting circuit includes: that the first NOT gate, the second NOT gate, third are non-
Door, the 4th NOT gate, the first field-effect tube, the second field-effect tube, the first control capacitor, the second control capacitor, first NOT gate
Input terminal be connected with the second antenna, the output end of first NOT gate is connected with the input terminal of second NOT gate, described
The output end of two NOT gates is connected with the first control terminal of the charging control circuit；The input terminal of the third NOT gate and first day
Line be connected, the output end of the third NOT gate is connected with the input terminal of the 4th NOT gate, the output end of the 4th NOT gate and
Second control terminal of the charging control circuit is connected；The drain electrode of first field-effect tube and grid are connected to form diode junction
Structure, and the drain electrode of first field-effect tube, the connecting pin of grid are connected with the first antenna, first field-effect tube
Source electrode is connected with the first end of the first control capacitor, the second end ground connection of the first control capacitor, first effect
Should pipe drain electrode and grid connecting pin be the energy harvesting circuit first input end；The drain electrode of second field-effect tube
Diode structure, and the drain electrode of second field-effect tube, the connecting pin of grid and second antenna are connected to form with grid
It is connected, the source electrode of second field-effect tube is connected with the first end of the second control capacitor, the second control capacitor
Second end ground connection, the drain electrode of second field-effect tube and the connecting pin of grid are the second input of the energy harvesting circuit
End.
In one possible implementation, the charging control circuit includes: first and door, second and door, third field
Effect pipe, the 4th field-effect tube, described first with the output of the input terminal of door and second antenna, the power sense circuit
End is respectively connected with, and described first is connected with the output end of door with the grid of the third field-effect tube, and described first is defeated with door
Enter the first control terminal that end is the charging control circuit；Described second with the input terminal of door and the first antenna, the electricity
The output end of power sense circuit is respectively connected with, and described second is connected with the output end of door with the grid of the 4th field-effect tube,
Described second is the second control terminal of the charging control circuit with the input terminal of door；The drain electrode of the third field-effect tube and institute
The source electrode for stating the first field-effect tube is connected, the first end of the source electrode of the third field-effect tube and the output electric capacity of voltage regulation, institute
It states supply voltage to be respectively connected with, the drain electrode of the third field-effect tube is the first input end of the charging control circuit；It is described
The drain electrode of 4th field-effect tube is connected with the source electrode of second field-effect tube, the source electrode of the 4th field-effect tube with it is described defeated
The first end of electric capacity of voltage regulation, the supply voltage are respectively connected with out, and the drain electrode of the 4th field-effect tube is the charge control
Second input terminal of circuit.
In one possible implementation, the power sense circuit includes: comparator, first resistor, second resistance,
The first end of the first resistor is respectively connected with the first end of the output electric capacity of voltage regulation, the supply voltage, and described first
The second end of resistance is connected with the first end of the second resistance, the second end ground connection of the second resistance；The comparator
Output end is connected with the control terminal of the charging control circuit, negative input end connection first resistor and the second electricity of the comparator
The common end of resistance, the output end of the comparator are the output end of the power sense circuit.
In one possible implementation, the comparator is hysteresis comparator.
A kind of electronic tag power rectifier circuit provided in an embodiment of the present invention, circuit power consumption is low, and circuit does not need adjustable
The circuits such as resistance VR, circuit without quiescent dissipation, are able to achieve the ultra high frequency IC tag power rectifier circuit of low-power consumption substantially；Circuit knot
Structure is stablized, and carries out charging by diode pair capacitor and realizes radio-frequency alternating current signal rectification, is directly filled to capacitor using antenna
Electricity reduces the difficulty of circuit design using radio-frequency carrier signal as the control signal of charge circuit.Circuit realization is succinct,
Only used three capacitors and 4 field-effect tube realizes the rectification and voltage adjustment of AC signal.Technique relies on small, device kind
Class is few, and field-effect tube can make switch and use technique, temperature deviation minimum on power source performance influence.And due to only using
Four field-effect tube and three capacitors (wherein CL and VDD capacitor is shared), eliminate high voltage stabilizing capacitor and power supply regulator circuit
Equal circuit areas, reduce chip area.
According to below with reference to the accompanying drawings becoming to detailed description of illustrative embodiments, other feature of the invention and aspect
It is clear.
Detailed description of the invention
Comprising in the description and constitute the attached drawing of part of specification and specification together illustrate it is of the invention
Exemplary embodiment, feature and aspect, and principle for explaining the present invention.
Fig. 1 shows the circuit connection diagram of the electronic tag power rectifier circuit of first embodiment of the invention offer；
Fig. 2 shows the circuit connection diagrams for the electronic tag power rectifier circuit that second embodiment of the invention provides；
Fig. 3 shows the circuit connection diagram of the electronic tag power rectifier circuit of third embodiment of the invention offer；
Fig. 4 shows the circuit connection diagram of the electronic tag power rectifier circuit of fourth embodiment of the invention offer.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention will be described in detail, it is to be understood that guarantor of the invention
Shield range is not limited by the specific implementation.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.Unless
Separately have it is other explicitly indicate that, otherwise in entire disclosure and claims, term " includes " or its transformation such as "comprising" or
" including " etc. will be understood to comprise stated element or component, and not exclude other elements or other compositions
Part.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.
In addition, in order to better illustrate the present invention, numerous details is given in specific embodiment below.
It will be appreciated by those skilled in the art that without certain details, the present invention equally be can be implemented.In some instances, for
Method well known to those skilled in the art, means, element are not described in detail, in order to highlight purport of the invention.
Electronic tag power rectifier circuit provided in an embodiment of the present invention realizes AC DC rectification, electricity using new method
The purpose of adjustment is pressed, the power rectifier circuit to suit the requirements is realized with lesser design difficulty and chip area.
Fig. 1 shows the circuit connection diagram of the electronic tag power rectifier circuit of first embodiment of the invention offer, such as
Shown in Fig. 1, which includes: energy harvesting circuit 10, charging control circuit 20, power sense circuit 30, output electric capacity of voltage regulation
The first input end of CL, the energy harvesting circuit 10 are connected with first antenna ANT1, the second input terminal and the second antenna ANT2
It is connected, output end is connected with the input terminal of the charging control circuit 20, and the energy harvesting circuit 10 is used to obtain from antenna
Electricity and by charge transport to the charging control circuit 20；When the first antenna ANT1 and the second antenna ANT2 difference
Export high level；It is the control terminal of the charging control circuit 20 and the first antenna ANT1, the second antenna ANT2, described
The output end of power sense circuit 30 is respectively connected with, the output end of the charging control circuit 20 and the output electric capacity of voltage regulation CL
First end, supply voltage be respectively connected with, the charging control circuit 20 for control to the output electric capacity of voltage regulation CL progress
The quantity of electric charge of charging；The first end of the input terminal of the power sense circuit 30 and the output electric capacity of voltage regulation CL, supply voltage
It is respectively connected with, the power sense circuit 30 is for judging whether to charge to the output electric capacity of voltage regulation CL；The output
The second end of electric capacity of voltage regulation CL is grounded.
In one possible implementation, the output end of the energy harvesting circuit 10 includes the first output end and second
Output end, the control terminal of the charging control circuit 20 include the first control terminal and the second control terminal, the charging control circuit
20 input terminal includes first input end and the second input terminal, the first output end and the charging of the energy harvesting circuit 10
The first input end of control circuit 20 is connected, the second output terminal of the energy harvesting circuit 10 and the charging control circuit 20
The second input terminal be connected；First control terminal of the charging control circuit 20 and the second antenna ANT2, the power supply are examined
The output end of slowdown monitoring circuit 30 is respectively connected with；Second control terminal of the charging control circuit 20 and the first antenna ANT1, institute
The output end for stating power sense circuit 30 is respectively connected with.
In embodiments of the present invention, being connected with antenna is voltage signal for receiving antenna, the electricity of first antenna ANT1
The voltage signal of pressure signal and the second antenna ANT2 are the voltage signal that electronic tag receives, and are specifically as follows from card reader coupling
It is bonded to the voltage signal of electronic tag, the i.e. first input end of energy harvesting circuit 10, the second input terminal and electronic label antenna
Both ends be respectively connected with；The signal of electronic tag coupling at this time is sine wave, i.e., obtains circuit 10 in half period self-energy
First input end receives high level, and the second input terminal receives high level in another half period.
In the embodiment of the present invention, the electronic tag power rectifier circuit course of work is specific as follows: energy harvesting circuit 10
After receiving the voltage signal of ANT1 or the voltage signal of ANT2, the aerial signal received is converted into direct current, passes through energy
Amount obtains the first output end of circuit 10 or second output terminal is output to charging control circuit 20, and passes through charging control circuit 20
For output electric capacity of voltage regulation charging, charging control circuit 20 controls energy harvesting circuit 10 by the on-off of itself and exports to pressure stabilizing
The quantity of electric charge of capacitor charging.The supply voltage of the acquisition electric capacity of voltage regulation output in real time of power sense circuit 30, and by comparing power supply
The size relation of voltage and reference voltage VREF judge whether to need to charge to output electric capacity of voltage regulation.
A kind of electronic tag power rectifier circuit provided in an embodiment of the present invention, circuit power consumption is low, and circuit does not need adjustable
The circuits such as resistance VR, circuit without quiescent dissipation, are able to achieve the ultra high frequency IC tag power rectifier circuit of low-power consumption substantially；Circuit knot
Structure is stablized, and the difficulty of circuit design is reduced.Circuit realizes that succinctly, technique dependence is small, and technique, temperature deviation are to power source performance shadow
Sound is minimum, and reduces chip area.
As shown in Fig. 2, the energy harvesting circuit 10 includes: the first NOT gate N1, second in second embodiment of the invention
NOT gate N2, third NOT gate N3, the 4th NOT gate N4, the first field-effect tube M1a, the second field-effect tube M1b, first control capacitor C1a,
Second control capacitor C1b, the input terminal of the first NOT gate N1 are connected with the second antenna ANT2, the output of the first NOT gate N1
End is connected with the input terminal of the second NOT gate N2, and the of the output end of the second NOT gate N2 and the charging control circuit 20
One control terminal is connected；The input terminal of the third NOT gate N3 is connected with first antenna ANT1, the output end of the third NOT gate N3
It is connected with the input terminal of the 4th NOT gate N4, the output end of the 4th NOT gate N4 and the second of the charging control circuit 20
Control terminal is connected；The drain electrode of the first field-effect tube M1a and grid are connected to form diode structure, and first field-effect
The drain electrode of pipe M1a, the connecting pin of grid are connected with the first antenna ANT1, the source electrode of the first field-effect tube M1a and institute
The first end for stating the first control capacitor C1a is connected, the second end ground connection of the first control capacitor C1a, first field-effect
The drain electrode of pipe M1a and the connecting pin of grid are the first input end of the energy harvesting circuit 10；The second field-effect tube M1b
Drain electrode and grid be connected to form diode structure, and the drain electrode of the second field-effect tube M1b, grid connecting pin with it is described
Second antenna ANT2 is connected, and the source electrode of the second field-effect tube M1b is connected with the first end of the second control capacitor C1b,
The second end ground connection of the second control capacitor C1b, the drain electrode of the second field-effect tube M1a and the connecting pin of grid are described
Second input terminal of energy harvesting circuit 10.
In any embodiment of that present invention, field-effect tube can be metal (metal)-oxide (oxide)-semiconductor
(semiconductor) field effect transistor, i.e. metal-oxide-semiconductor.
In embodiments of the present invention, energy harvesting circuit 10 is made of M1a, M1b, C1a and C1b, the drain and gate of M1a
It is connected to form diode structure, the drain and gate of M1b, which is connected, also forms diode structure.When aerial voltage is high.Antenna is logical
It crosses M1 to charge to C1, the upper voltage of C1 reaches Vant-Vth, wherein Vant is aerial voltage, and Vth is field-effect tube M1a or M1b
Threshold voltage；When aerial voltage is low, diode unilateral conduction characteristic guarantees that charge is not revealed to antenna end on capacitor.Due to
Aerial signal is fully differential signal, and C1a and C1b will be by alternately charge and discharge.Such as: when ANT1 voltage is high, ANT2 voltage is low,
Then antenna is charged by M1a to C1a, and M1b shutdown, antenna will not charge to C1b, and the charge of C1b is not to antenna end
Leakage；Otherwise similarly.
In embodiments of the present invention, when controlling M2a and M2b by ANT1, ANT2, not necessarily due to original aerial signal
Square-wave signal, therefore there may be error or mistakes when control M2a and M2b, pass through two NOT gate (the first NOT gate N1 and second that connect
NOT gate N2 series connection, third NOT gate N3 connects with the 4th NOT gate N4) aerial signal can be converted to the square-wave signal of more standard,
Preferably M2a and M2b can be controlled.
A kind of electronic tag power rectifier circuit provided in an embodiment of the present invention, circuit power consumption is low, and circuit does not need adjustable
The circuits such as resistance VR, circuit without quiescent dissipation, are able to achieve the ultra high frequency IC tag power rectifier circuit of low-power consumption substantially；Circuit knot
Structure is stablized, and is charged by diode pair capacitor, realizes radio-frequency alternating current signal rectification, is directly filled to capacitor using antenna
Electricity reduces the difficulty of circuit design using radio-frequency carrier signal as the control signal of charge circuit.Circuit realizes succinct, work
Skill dependence is small, and technique, temperature deviation are minimum on power source performance influence, and reduce chip area.
As shown in figure 3, in the third embodiment of the present invention, the charging control circuit 20 includes: first and door A1, the
Two with door A2, third field-effect tube M2a, the 4th field-effect tube M2b, described first with the input terminal of door A1 and second antenna
ANT2, the power sense circuit 30 output end be respectively connected with, described first imitates with the output end of door A1 and the third field
Should the grid of pipe M2a be connected, described first is the first control terminal of the charging control circuit 20 with the input terminal of door A1；It is described
Second is respectively connected with the output end of the input terminal and the first antenna ANT1, the power sense circuit 30 of door A2, described
Second is connected with the output end of door A2 with the grid of the 4th field-effect tube M2b, and the input terminal of described second and door A2 is institute
State the second control terminal of charging control circuit 20；The drain electrode of the third field-effect tube M2a is with the first field-effect tube M1a's
Source electrode is connected, the first end of the source electrode of the third field-effect tube M2a and the output electric capacity of voltage regulation CL, the supply voltage point
Not Xiang Lian, the drain electrode of the third field-effect tube M2a is the first input end of the charging control circuit 20；4th effect
Should the drain electrode of pipe M2b be connected with the source electrode of the second field-effect tube M1b, the source electrode of the 4th field-effect tube M2b with it is described
The first end of output electric capacity of voltage regulation CL, the supply voltage are respectively connected with, and the drain electrode of the 4th field-effect tube M2b is described fills
Second input terminal of electric control circuit 20.
In embodiments of the present invention, charging control circuit 20 adjusts the quantity of electric charge that capacitor C1 charges to CL.When ANT1 be it is high,
It is low level since first and door A1 has an input when ANT2 is low, M2a ends, and ANT1 gives C1a charging by M1a；
When ANT1 be it is low, ANT2 is high when, M1a cut-off, M2a conducting, C1a by M2a to CL charge；Likewise, C1b charged to CL
Journey is similar therewith.When chip radio frequency signal frequency is FsWhen, the frequency that capacitor moves charge is 2*Fs, the maximum bringing onto load of circuit
Ability are as follows: Imax=2*Fs* C1* (Vant-Vth-VDD), wherein Vant is aerial voltage, and Vth is the threshold voltage of M1.
A kind of electronic tag power rectifier circuit provided in an embodiment of the present invention, circuit power consumption is low, and circuit does not need adjustable
The circuits such as resistance VR, circuit without quiescent dissipation, are able to achieve the ultra high frequency IC tag power rectifier circuit of low-power consumption substantially；Circuit knot
Structure is stablized, and carries out charging by diode pair capacitor and realizes radio-frequency alternating current signal rectification, is directly filled to capacitor using antenna
Electricity reduces the difficulty of circuit design using radio-frequency carrier signal as the control signal of charge circuit.Circuit realization is succinct,
Technique dependence is small, and technique, temperature deviation are minimum on power source performance influence, and reduce chip area.
As shown in figure 4, the power sense circuit 30 includes: comparator, first resistor in fourth embodiment of the invention
First end, the supply voltage of R1, second resistance R2, the first end of the first resistor R1 and the output electric capacity of voltage regulation CL
It is respectively connected with, the second end of the first resistor R1 is connected with the first end of the second resistance R2, the second resistance R2's
Second end ground connection；The output end of the comparator be connected with the control terminal of the charging control circuit 20 (comparator it is defeated
The first control terminal and the second control terminal of outlet and the charging control circuit 20 are respectively connected with), the negative input of the comparator
The common end of end connection first resistor R1 and second resistance R2, the positive input terminal connection reference voltage of the comparator is (with reference to electricity
Pressure) VREF, the output end of the comparator is the output end of the power sense circuit 30.
Optionally, the comparator is hysteresis comparator.
The output of power sense circuit 30 is by the gate with door realization charging clock, when supply voltage VDD is greater than charging
When threshold value, power sense circuit 30 exports low level, turns off M2, stops charging to CL；When supply voltage VDD is less than discharge threshold
When, power sense circuit 30 exports high level, and M2 is connected, charges to CL；Charging control circuit 20 can be by the voltage control of CL
System is within the required range.Power sense circuit 30 is by comparing the size relation between supply voltage VDD and reference voltage VREF
Judge whether to need to be connected corresponding M2, and then charge to CL, in figure VM+ and VM- be respectively comparator output be flipped up and
The hysteresis voltage downwardly turned over, the output of power sense circuit 30 whether be high level and VDD value range have it is right below
It should be related to:
WhenWhen, power sense circuit 30 exports high level；
WhenWhen, power sense circuit 30 exports low level；
WhenWhen, power detecting
The output of circuit 30 remains unchanged.
Therefore, when ANT1 is high level, the drain electrode of M1a is high level, and the drain electrode of M2b is also high level, if power supply
Detection circuit 30 exports high level, then M1a and M2b conducting, and M2a and M1b shutdown, antenna are C1a charging；If stored on C1b
There is charge, then can be moved the charge in C1b to output electric capacity of voltage regulation CL, as CL charging by charging control circuit 20.
When ANT2 is high level, the drain electrode of M1b is high level, and the drain electrode of M2a is also high level, if power detecting is electric
Road 30 exports high level, then M2a and M1b conducting, M1a and M2b shutdown.C1a charging at this time terminates, and antenna is C1b charging；Due to
M2a conducting, therefore the charge stored in C1a can be moved to output electric capacity of voltage regulation CL, as CL charging.Due to ANT1 and ANT2
It therefore can be by the voltage signal of the alternation by filling by the energy harvesting circuit 10 for the sine voltage signal of alternately variation
Electric control circuit 20 is CL charging.
A kind of electronic tag power rectifier circuit provided in an embodiment of the present invention, circuit power consumption is low, and circuit does not need adjustable
The circuits such as resistance VR, circuit without quiescent dissipation, are able to achieve the ultra high frequency IC tag power rectifier circuit of low-power consumption substantially；Circuit knot
Structure is stablized, and carries out charging by diode pair capacitor and realizes radio-frequency alternating current signal rectification, is directly filled to capacitor using antenna
Electricity reduces the difficulty of circuit design using radio-frequency carrier signal as the control signal of charge circuit.Circuit realization is succinct,
Only used three capacitors and 4 field-effect tube realizes the rectification and voltage adjustment of AC signal.Technique relies on small, device kind
Class is few, and field-effect tube can make switch and use technique, temperature deviation minimum on power source performance influence.And due to only using
Four field-effect tube and three capacitors (wherein CL and VDD capacitor is shared), eliminate high voltage stabilizing capacitor and power supply regulator circuit
Equal circuit areas, reduce chip area.
The aforementioned description to specific exemplary embodiment of the invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining specific principle of the invention and its actually answering
With so that those skilled in the art can be realized and utilize a variety of different exemplary implementation schemes of the invention and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
Claims (6)
1. a kind of electronic tag power rectifier circuit characterized by comprising energy harvesting circuit, charging control circuit, power supply
Detection circuit, output electric capacity of voltage regulation,
The first input end of the energy harvesting circuit is connected with first antenna, and the second input terminal is connected with the second antenna, output
End is connected with the input terminal of the charging control circuit, and the energy harvesting circuit is used to obtain electricity from antenna and passes electricity
It is defeated to arrive the charging control circuit；
The first antenna and second antenna do not export high level simultaneously；
The control terminal of the charging control circuit and the first antenna, second antenna, the power sense circuit it is defeated
Outlet is respectively connected with, and the first end of the output end of the charging control circuit and the output electric capacity of voltage regulation, supply voltage are distinguished
It is connected, the charging control circuit is used to control the quantity of electric charge to charge to the output electric capacity of voltage regulation；
The input terminal of the power sense circuit is connected with the second end of the output electric capacity of voltage regulation, and the power sense circuit is used
In judging whether to charge to the output electric capacity of voltage regulation；The second end ground connection of the output electric capacity of voltage regulation.
2. electronic tag power rectifier circuit according to claim 1, which is characterized in that
The output end of the energy harvesting circuit includes the first output end and second output terminal, the control of the charging control circuit
End includes the first control terminal and the second control terminal, and the input terminal of the charging control circuit includes first input end and the second input
End,
First output end of the energy harvesting circuit is connected with the first input end of the charging control circuit, and the energy obtains
The second output terminal of sense circuit is connected with the second input terminal of the charging control circuit；
First control terminal of the charging control circuit and the output end of second antenna, the power sense circuit distinguish phase
Even；
Second control terminal of the charging control circuit and the output end of the first antenna, the power sense circuit distinguish phase
Even.
3. electronic tag power rectifier circuit according to claim 2, which is characterized in that the energy harvesting circuit packet
It includes: the first NOT gate, the second NOT gate, third NOT gate, the 4th NOT gate, the first field-effect tube, the second field-effect tube, the first control electricity
Hold, the second control capacitor,
The input terminal of first NOT gate is connected with the second antenna, and the output end of first NOT gate is defeated with second NOT gate
Enter end to be connected, the output end of second NOT gate is connected with the first control terminal of the charging control circuit；
The input terminal of the third NOT gate is connected with first antenna, and the output end of the third NOT gate is defeated with the 4th NOT gate
Enter end to be connected, the output end of the 4th NOT gate is connected with the second control terminal of the charging control circuit；
The drain electrode of first field-effect tube and grid are connected to form diode structure, and the drain electrode of first field-effect tube,
The connecting pin of grid is connected with the first antenna, and the first of the source electrode of first field-effect tube and the first control capacitor
End is connected, and the second end ground connection of the first control capacitor, the drain electrode of first field-effect tube and the connecting pin of grid are institute
State the first input end of energy harvesting circuit；
The drain electrode of second field-effect tube and grid are connected to form diode structure, and the drain electrode of second field-effect tube,
The connecting pin of grid is connected with second antenna, and the first of the source electrode of second field-effect tube and the second control capacitor
End is connected, and the second end ground connection of the second control capacitor, the drain electrode of second field-effect tube and the connecting pin of grid are institute
State the second input terminal of energy harvesting circuit.
4. electronic tag power rectifier circuit according to claim 3, which is characterized in that the charging control circuit packet
It includes: first and door, second and door, third field-effect tube, the 4th field-effect tube,
Described first is respectively connected with the output end of the input terminal and second antenna, the power sense circuit of door, described
First is connected with the output end of door with the grid of the third field-effect tube, and described first with the input terminal of door is that the charging is controlled
First control terminal of circuit processed；
Described second is respectively connected with the input terminal of door and the output end of the first antenna, the power sense circuit, described
Second is connected with the output end of door with the grid of the 4th field-effect tube, and described second with the input terminal of door is that the charging is controlled
Second control terminal of circuit processed；
The drain electrode of the third field-effect tube is connected with the source electrode of first field-effect tube, the source electrode of the third field-effect tube
It is respectively connected with the first end of the output electric capacity of voltage regulation, the supply voltage, the drain electrode of the third field-effect tube is described
The first input end of charging control circuit；
The drain electrode of 4th field-effect tube is connected with the source electrode of second field-effect tube, the source electrode of the 4th field-effect tube
It is respectively connected with the first end of the output electric capacity of voltage regulation, the supply voltage, the drain electrode of the 4th field-effect tube is described
Second input terminal of charging control circuit.
5. electronic tag power rectifier circuit according to claim 1 or 2, which is characterized in that the power sense circuit
It include: comparator, first resistor, second resistance,
The first end of the first resistor is respectively connected with the first end of the output electric capacity of voltage regulation, the supply voltage, described
The second end of first resistor is connected with the first end of the second resistance, the second end ground connection of the second resistance；
The output end of the comparator is connected with the control terminal of the charging control circuit, the negative input end connection of the comparator
The common end of first resistor and second resistance, the output end of the comparator are the output end of the power sense circuit.
6. electronic tag power rectifier circuit according to claim 5, which is characterized in that the comparator compares for magnetic hysteresis
Device.
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| CN201611142363.4A CN106599971B (en) | 2016-12-12 | 2016-12-12 | A kind of electronic tag power rectifier circuit |
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| CN201611142363.4A CN106599971B (en) | 2016-12-12 | 2016-12-12 | A kind of electronic tag power rectifier circuit |
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| CN106599971B true CN106599971B (en) | 2019-06-07 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1996352A (en) * | 2006-12-28 | 2007-07-11 | 复旦大学 | Semi-active RFID tag supporting wireless charging |
| JP2008123074A (en) * | 2006-11-09 | 2008-05-29 | Renesas Technology Corp | Semiconductor integrated circuit |
| CN101937519A (en) * | 2010-08-27 | 2011-01-05 | 电子科技大学 | Wirelessly chargeable RFID electronic tag |
| US7944279B1 (en) * | 2009-12-31 | 2011-05-17 | Nxp B.V. | Charge pump stage of radio-frequency identification transponder |
| CN102567767A (en) * | 2010-12-15 | 2012-07-11 | 上海华虹Nec电子有限公司 | Demodulator circuit of electronic tag of RFID (radio frequency identification) system |
-
2016
- 2016-12-12 CN CN201611142363.4A patent/CN106599971B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008123074A (en) * | 2006-11-09 | 2008-05-29 | Renesas Technology Corp | Semiconductor integrated circuit |
| CN1996352A (en) * | 2006-12-28 | 2007-07-11 | 复旦大学 | Semi-active RFID tag supporting wireless charging |
| US7944279B1 (en) * | 2009-12-31 | 2011-05-17 | Nxp B.V. | Charge pump stage of radio-frequency identification transponder |
| CN101937519A (en) * | 2010-08-27 | 2011-01-05 | 电子科技大学 | Wirelessly chargeable RFID electronic tag |
| CN102567767A (en) * | 2010-12-15 | 2012-07-11 | 上海华虹Nec电子有限公司 | Demodulator circuit of electronic tag of RFID (radio frequency identification) system |
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| CN106599971A (en) | 2017-04-26 |
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Address after: 100192, room 2, building 66, C District, Zhongguancun Dongsheng Science Park, No. 305 Xiao Dong Road, Beijing, Haidian District Co-patentee after: STATE GRID INFORMATION & TELECOMMUNICATION GROUP Co.,Ltd. Patentee after: BEIJING SMARTCHIP MICROELECTRONICS TECHNOLOGY Co.,Ltd. Co-patentee after: STATE GRID CORPORATION OF CHINA Address before: Room 305, building 2, Zone C, Dongsheng science and Technology Park, Zhongguancun, No. 66, xixiaokou Road, Haidian District, Beijing 100192 Co-patentee before: STATE GRID INFORMATION & TELECOMMUNICATION GROUP Co.,Ltd. Patentee before: BEIJING SMARTCHIP MICROELECTRONICS TECHNOLOGY Co.,Ltd. Co-patentee before: State Grid Corporation of China |
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Effective date of registration: 20191118 Address after: 102299 1st floor, building 12, courtyard 79, Shuangying West Road, science and Technology Park, Changping District, Beijing Co-patentee after: STATE GRID INFORMATION & TELECOMMUNICATION GROUP Co.,Ltd. Patentee after: Beijing Smart core semiconductor technology Co.,Ltd. Co-patentee after: STATE GRID CORPORATION OF CHINA Address before: Room 305, building 2, Zone C, Dongsheng science and Technology Park, Zhongguancun, No. 66, xixiaokou Road, Haidian District, Beijing 100192 Co-patentee before: STATE GRID INFORMATION & TELECOMMUNICATION GROUP Co.,Ltd. Patentee before: BEIJING SMARTCHIP MICROELECTRONICS TECHNOLOGY Co.,Ltd. Co-patentee before: STATE GRID CORPORATION OF CHINA |