CN103731046B - A kind of active rectification control circuit and passive RFID and active rectification control method - Google Patents
A kind of active rectification control circuit and passive RFID and active rectification control method Download PDFInfo
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- CN103731046B CN103731046B CN201410009153.2A CN201410009153A CN103731046B CN 103731046 B CN103731046 B CN 103731046B CN 201410009153 A CN201410009153 A CN 201410009153A CN 103731046 B CN103731046 B CN 103731046B
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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
- G06K19/0707—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 the arrangement being capable of collecting energy from external energy sources, e.g. thermocouples, vibration, electromagnetic radiation
- G06K19/0708—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 the arrangement being capable of collecting energy from external energy sources, e.g. thermocouples, vibration, electromagnetic radiation the source being electromagnetic or magnetic
- G06K19/0709—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 the arrangement being capable of collecting energy from external energy sources, e.g. thermocouples, vibration, electromagnetic radiation the source being electromagnetic or magnetic the source being an interrogation field
Abstract
The invention belongs to technical field of RFID, in particular to a kind of active rectification control circuit and the passive RFID including the circuit, meanwhile, the method for carrying out active rectification control to circuit the invention further relates to the above-mentioned passive RFID of application.Passive RFID of the present invention continuously can carry out dynamic rectification control to the voltage between first antenna end and the second antenna end, when antenna end overtension, described active rectification control circuit can turn on grounded circuit, so that the electric charge of antenna end is exported to ground, reduce the quantity of electric charge of antenna end, reduce the DC voltage that rectification goes out；When the voltage is when within stop voltage, grounded circuit is in cut-off state, whole electric charge rectifications of antenna end are that dc source uses for load circuit by rectification circuit, it is therefore prevented that too high voltage damage load circuit, while also prevent the generation that card reader end receives saturated phenomenon.
Description
Technical field
The invention belongs to technical field of RFID, in particular to a kind of active rectification control circuit and including the circuit
Passive RFID, meanwhile, the invention further relates to application above-mentioned passive RFID to circuit carry out active rectification control method.
Background technology
Passive radio frequency identification (Radio Frequency Identification, RFID) label in itself without battery, its
The electromagnetic energy sent by card reader works.Due to its structurally simple, economical practicality, thus it is chased after in logistics management, assets
Track and portable medical field obtain a wide range of applications.
When passive RFID tags work, it can absorb the electromagnetic energy of card reader transmission from surrounding environment.Passive RFID
Part energy rectification is dc source after energy is absorbed by label, so that passive RFID tags internal circuit works；Nothing
Source RFID label tag can also be to carrying by the modulation-demodulation circuit inside another part energy input, modulation-demodulation circuit in the energy
Am signals be demodulated, and by the signal after demodulation be sent to passive RFID tags digital baseband part handle.
Due to the distance of passive RFID tags and card reader be change, therefore, when passive RFID tags work, its from
The electromagnetic energy absorbed in surrounding environment is also change.When the electricity that passive RFID tags are too near from card reader or card reader is sent
When magnetic energy is too strong, the signal intensity that passive RFID tags receive is also relatively strong, so that the voltage sensed on coil has exceeded core
The pressure-resistant limit of transistor in piece used in rectifier module, causes the permanent damage of transistor, causes RFID label tag to fail.
Passive RFID tags transmit data to card reader by way of loading and modulating, and the coil at card reader end detects
The impedance variations of RFID label tag end-coil are so as to obtaining data.When passive RFID tags are too near from card reader or card reader sends
When electromagnetic energy is too strong, the saturation that the load modulation signal come easily causes card reader receiving terminal is coupled back into from RFID label tag end,
So that Communications failure.This failure says the word and then waited the RTF communication modes of RFID label tag response first in card reader
It is easier to occur under (Reader Talk First).
In order to solve the problems, such as that above-mentioned pressure-resistant reliability and card reader receive saturation, needed inside RFID label chip circuit
Apply amplitude limitation process circuit, a predetermined numerical value is limited in the antenna ends voltage ensured in RFID label tag.
University of Electronic Science and Technology is with entitled filed in 30 days November in 2010《One kind is used for super high frequency radio frequency identification label core
The demodulator circuit of piece》, in the patent of invention of Application No. 201010568305.4, amplitude limitation function is by a voltage ratio
Implement compared with device, the voltage comparator compares envelope signal caused by envelope detection circuit, i.e. data message, and envelope signal
Size relativity between the average of itself, so as to export height logical signal by the phase inverter behind voltage comparator, i.e.,
Signal after demodulation.In this way, even in the close or far caused signal intensity difference between card reader and electronic tag very
In the case of big, the demodulator circuit still is able to adaptively ensure the stability of average generation circuit, ensures that demodulation electricity
The work of road normal table.
The technology of adaptive adjustment the first gate pmos pole tension used is indirect monitoring radiofrequency signal in above-mentioned patent
A kind of method of intensity.The object of wherein dynamic adjustment is the PMOS as equivalent resistance so that in unlike signal intensity
The raceway groove equivalent resistance of the lower PMOS keeps stabilization, namely stable with the time constant filter of electric capacity composition, final to obtain surely
Fixed detection effect, it is ensured that the work of demodulator circuit normal table.The application adjusts for the dynamic of rectifier voltage amplitude
And the size of RF signal strength is monitored, regulating object is the amplitude limiter circuit of rectifier so that the electric leakage from antenna port to ground
Logical circulation road has different degrees of opening degree under different signal strength conditions, so as to protect the transistor of radio-frequency front-end not
By affected by high, the generation of the reception saturated phenomenon at card reader end it also avoid.
Shimadzu Scisakusho Ltd is entitled with filed in 9 days June in 2008《Amplitude limiter circuit》, Application No.
200880129721.5 PCT Patent, it is electric beyond bound threshold signal to propose that a kind of conducting, cut-off using transistor is cut away
The amplitude limiter circuit of pressure value.The amplitude limiter circuit is for the amplitude limit to signal intensity, and it is directed to constant power input
Circuit, different from the rectifier control circuit employed in the application, and the circuit can not be also diverted in RFID circuit.
Tianjin Qiangxin IC Design Co., Ltd is entitled with No. 20 applications of in August, 2007《One kind is penetrated
Frequency identification tag circuit system structure and its method of work and application》, the patent of invention of Application No. 200710058875.7, only
The inventive point of one proposition is to different modules from the power supply Xian Fenliaoji roads that rectifier exports, and proposes to improve with this
The viewpoint of energy conversion and service efficiency.First, the separated several roads of its power line are connected to the way of disparate modules, are that chip is set
Normal practice in meter, but fail to illustrate in this application and understand how energy conversion and service efficiency improve, bring up to
What degree.Reach real efficiency to improve, (inherently one commonly connects the connection being just previously mentioned in this application for that
Method) it is inadequate, export branch road with rectifier results even in directly to the circuit for producing high voltage power supply of memory control module
The problem of oscillator power consumption used in charge pump is very big.Secondly, this application is whole without reference to dynamically being adjusted described in present patent application
The aspect of device input terminal voltage magnitude circuit is flowed, the inventive point with present patent application is without repeatability.
Shanghai Huahong Integrated Circuit Co., Ltd is entitled with filed on 03 17th, 2006《For non-contact
The limiter protection circuit of Formulas I C cards and radio frequency identification label chip》, in the patent of invention of Application No. 200610024814.4, carry
Go out a kind of to improve the voltage stabilizing of radio frequency tag chip, clock, the amplitude limiter circuit for the purpose of the performance of demodulation reset circuit, the limit
Width circuit is for the purpose of the overvoltage drive caused by the high field for protecting moment sensing, and the receiving for solving card reader one end is satisfied
And problem.The patent is with the distinctive points present in the application：
1st, because the purpose of amplitude limiter circuit is different, the amplitude limiter circuit of Shanghai Huahong is the detection by high pressure or low pressure
Circuit controls the discharge and recharge to an electric capacity to produce limitation signal.The limitation signal the change than field intensity have substantially compared with
Big time constant, i.e., the change of voltage amplitude on slow reaction antenna.Such technology can not play what the application was proposed
The purpose of overvoltage protection, because within limited time constant, the transistor inside radio frequency tag chip has been in overvoltage
The unreliable state of driving.So change of the amplitude limiter circuit disclosed in the present application to voltage on antenna has the reaction speed being exceedingly fast
Degree, can play a very good protection.
2nd, the amplitude limiter circuit of Shanghai Huahong has two paths of releasing, wherein a slow path, as it was previously stated, being not suitable for overvoltage
Protection, another path of releasing controlled by demodulated signal, is essentially different with technology disclosed in the present application.
3rd, the high pressure detection of Shanghai Huahong has two constant current source conducts with the switching tube that low pressure detection signal is controlled
Biasing, will cause larger DC power in passive RF label system, is unfavorable for reaching low-power consumption, highly sensitive mesh
's.
4th, the amplitude limiter circuit of Shanghai Huahong judges a little in the presence of two on detection antenna ends voltage, i.e. brownout faces
The critical point of boundary's point and overtension.When the voltage of antenna ends is less than the critical point of brownout, the electric charge on electric capacity obtains
To releasing.When antenna both end voltage is higher than the critical point of overtension, the electric charge on electric capacity obtains charging accumulation.Among these
Problem is that upper and lower two controlling switches are in off state, electricity when the voltage of antenna ends is between two critical points
Voltage in appearance is to float, and is not controlled by any signal.The problem of this is one fatal in passive RF label chip, hold
Easily cause uncontrollable leakage current and off-energy, influence the sensitivity of label.This problem is in skill disclosed in the present application
It is not present in art, a unique decision-point defined herein carrys out the opening and closing of controlling switch, once open,
The conciliation is continuously adjustabe.
The content of the invention
Technical problem to be solved of the embodiment of the present invention is, there is provided a kind of active rectification control circuit and dynamic including this
The passive RFID of state rectifier control circuit, and the method that the application passive RFID carries out active rectification control to circuit, pass through
Control of the continuous dynamic adjustment realization to circuit voltage is carried out to rectifier voltage amplitude, prevents card reader end from receiving saturated phenomenon
Generation.
To achieve the above object, the technical solution used in the present invention is：
A kind of method for carrying out continuous active rectification control to circuit using passive RFID, this method comprise the following steps：
A, resonant capacitance and resonant inductance are connected in parallel in first antenna end and the second antenna end, and coupled external electromagnetism
The alternating current rectification is DC current and exported extremely by field so as to produce alternating current and input to rectification circuit, rectification circuit
The power input V of amplitude limiter circuit1；
B, if power input V1 magnitude of voltage is less than the conducting voltage of the first p-type metal-oxide-semiconductor gate source voltage and threshold cell
Sum, then the first p-type metal-oxide-semiconductor and threshold cell be not turned on, the second p-type metal-oxide-semiconductor drain electrode output electric current be zero, then with the 2nd P
Voltage V caused by the resistance R of type metal-oxide-semiconductor concatenationRIt is zero, the first N-type metal-oxide-semiconductor was not turned on, to first antenna end and second day
The quantity of electric charge between line end does not impact；If power input V1 magnitude of voltage is more than the first p-type metal-oxide-semiconductor gate source voltage and threshold
The conducting voltage sum of value cell, then the first p-type metal-oxide-semiconductor and threshold cell are turned on so as to produce branch current, the first p-type MOS
Pipe is by the branch current mirror image to the second p-type metal-oxide-semiconductor and flows through the resistance R of series connection with it and produces voltage difference VRInput to the first N
Type metal-oxide-semiconductor grid, the first N-type metal-oxide-semiconductor is turned on, by the source electrode of the first N-type metal-oxide-semiconductor by first antenna end and the second antenna end
Between electric charge export to ground so that the quantity of electric charge between first antenna end and the second antenna end reduces；
C, the quantity of electric charge between first antenna end and the second antenna end reduces, then the alternating voltage at bridge rectifier both ends
Reduce, the dc source that its rectification goes out reduces, so as to realize that continuous, circulation active rectification is carried out to circuit voltage to be controlled；
The threshold cell is at least one diode being connected in series, at least one diode, any two pole
Tube cathode end is connected to form cascaded structure with neighboring diode anode tap, and the actual use quantity of the diode is by described humorous
The electric capacity that shakes determines with the caused size for coupling alternating current required for resonant inductance.
Passive RFID of the present invention continuously can enter Mobile state to the voltage between first antenna end and the second antenna end
Rectification control, when antenna end overtension, described active rectification control circuit can turn on grounded circuit, so that day
The electric charge of line end is exported to ground, reduces the quantity of electric charge of antenna end, reduces the DC voltage that rectification goes out；When the voltage is limiting electricity
When within pressure, grounded circuit is in cut-off state, and whole electric charge rectifications of antenna end are that dc source supplies load by rectification circuit
Circuit uses, it is therefore prevented that too high voltage damage load circuit, while also prevent the generation that card reader end receives saturated phenomenon.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, embodiment will be described below
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also be attached according to these
Figure obtains other accompanying drawings.
Fig. 1 is the circuit general structure block diagram of the present invention；
Fig. 2 is the structure chart of rectification circuit embodiment one that the present invention uses；
Fig. 3 is the structure chart of rectification circuit embodiment two that the present invention uses；
Fig. 4 is the amplitude limiter circuit structure chart that the present invention uses；
Fig. 5 is the structure chart of amplitude limiter circuit embodiment one that the present invention uses；
Fig. 6 is the structure chart of amplitude limiter circuit embodiment two that the present invention uses；
Fig. 7 is the structure chart of amplitude limiter circuit embodiment three that the present invention uses.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
, it is necessary to which some keywords involved in the embodiment of the present invention solve before the embodiment of the present invention is described
Release.Connection described in the embodiment of the present invention, represent between two connection end points and direct or indirect annexation be present.
As shown in figure 1, the circuit general structure block diagram for the present invention.A kind of active rectification control circuit 1 of the present invention
Including：
Resonant capacitance C1, it is connected in parallel between first antenna end in1 and the second antenna end in2 with resonant inductance L, is used
In forming resonance circuit with resonant inductance L, receive external electromagnetic field and couple it to rectification circuit；
Rectification circuit, its input are connected to first antenna end in1 and the second antenna end in2, for the resonance is electric
The AC power of road coupling is converted to dc source and exported to external load circuit, its another way output end and carried for amplitude limiter circuit
Power supply source, while output head grounding all the way, for exporting electric charge to ground when field strength is too strong；
Amplitude limiter circuit, its power input are connected to the rectification circuit power output end V1, its output end VRIt is connected to whole
Current circuit control signal.
Fig. 2 is the structure chart of rectification circuit embodiment one that the present invention uses.The rectification circuit 2 includes being connected in parallel in the
The first rectification branch road between one antenna end in1 and the second antenna end in2, the second rectification branch road and the 3rd rectification branch road.
The first rectification branch road is bridge rectifier, one output head grounding, another output end Vdd_outIt is connected to outer
Section load circuit, the AC power for resonance circuit to be coupled are converted to dc source and provide power supply for external load circuit.
The second rectification branch road is the 5th diode being connected between first antenna end in1 and the second antenna end in2
D5 and the 6th diode D6, the 5th diode D5 and the 6th diode D6 are used to turn the AC power of resonance circuit coupling
It is changed to dc source V1And export to amplitude limiter circuit input, provide power supply for amplitude limiter circuit.
Second of example structure of the second rectification branch road is as shown in figure 3, the second rectification branch road is described in the embodiment
The second N-type metal-oxide-semiconductor NM2 for being connected between first antenna end in1 and the second antenna end in2 and the 3rd N-type metal-oxide-semiconductor NM3, it is described
Second N-type metal-oxide-semiconductor NM2 grids and drain electrode are respectively connecting to first antenna end in1, the 3rd N-type metal-oxide-semiconductor NM3 grids and drain electrode point
The second antenna end in2 is not connected to, and the second N-type metal-oxide-semiconductor NM2 source electrodes are connected to the 3rd N-type metal-oxide-semiconductor NM3 source electrodes, for by resonance
The AC power of circuit coupling is converted to dc source V1And export to amplitude limiter circuit input, provide power supply for amplitude limiter circuit.
Above-mentioned 5th diode D5 and the second N-type metal-oxide-semiconductor NM2, and the 6th diode D6 and the 3rd N-type metal-oxide-semiconductor NM3 are equal
For the electronic component of one-way conduction, for being straight by the AC power rectification between first antenna end in1 and the second antenna end in2
Flow power supply V1, then V1Magnitude of voltage be Vin1(positive half cycle AC signal) or Vin2(negative half period AC signal) subtracts diode or MOS
The threshold voltage of pipe.
The 3rd rectification branch road is the 7th diode being connected between first antenna end in1 and the second antenna end in2
D7 and the 8th diode D8, the 7th diode D7 and the 8th diode D8 cathode terminals are connected to the first N-type metal-oxide-semiconductor NM1 leakages
Pole, the first N-type metal-oxide-semiconductor NM1 grids are connected to the output end V of amplitude limiter circuitR, its source ground, for too strong in field strength
When by resonance circuit coupling electric charge export to ground, so as to reduce the electric charge between first antenna end in1 and the second antenna end in2
Amount.
Second of example structure of the 3rd rectification branch road is as shown in figure 3, the 3rd rectification branch road is described in the embodiment
The 4th N-type metal-oxide-semiconductor NM4 and the 5th N-type metal-oxide-semiconductor NM5 being connected between first antenna end in1 and the second antenna end in2, it is described
4th N-type metal-oxide-semiconductor NM4 grids and drain electrode are respectively connecting to first antenna end in1, the 5th N-type metal-oxide-semiconductor NM5 grids and drain electrode point
It is not connected to the second antenna end in2, the 4th N-type metal-oxide-semiconductor NM4 source electrodes are connected to the 5th N-type metal-oxide-semiconductor NM5 source electrodes and are connected to
One N-type metal-oxide-semiconductor NM1 drains, and the first N-type metal-oxide-semiconductor NM1 grids are connected to the output end V of amplitude limiter circuitR, its source ground,
For exporting the electric charge that resonance circuit couples to ground when field strength is too strong, so as to reduce first antenna end in1 and the second antenna
Hold the quantity of electric charge between in2.
Above-mentioned 7th diode D7 and the 4th N-type metal-oxide-semiconductor NM4, and the 8th diode D8 and the 5th N-type metal-oxide-semiconductor NM5 are equal
For the electronic component of one-way conduction, for being straight by the AC power rectification between first antenna end in1 and the second antenna end in2
Flow power supply and input to the first N-type metal-oxide-semiconductor NM1.
The one-way conduction electricity of rectified action is played in the first rectification branch road, the second rectification branch road and the 3rd rectification branch road
Subcomponent can use any form of combination of diode or metal-oxide-semiconductor, comprising but be not limited to two kinds shown in accompanying drawing
Combination, and can be by adjusting the size (i.e. the area of PN junction) of the diode or adjusting the channel dimensions ratio of metal-oxide-semiconductor
Example sets the magnification ratio of diode or metal-oxide-semiconductor, reaches the purpose for saving power consumption.
It is illustrated in figure 4 the amplitude limiter circuit structure chart that the present invention uses.The amplitude limiter circuit includes the first p-type metal-oxide-semiconductor
PM1, the second p-type metal-oxide-semiconductor PM2, resistance R and threshold cell,
The first p-type metal-oxide-semiconductor PM1 and the second p-type metal-oxide-semiconductor PM2 source electrodes are respectively connecting to power supply V1As current source,
One p-type metal-oxide-semiconductor PM1 grids are connected to the second p-type metal-oxide-semiconductor PM2 grids and form current mirror, the connection of the first p-type metal-oxide-semiconductor PM1 grids
Drained to it and be connected to the threshold cell, the output head grounding of threshold cell.The second p-type metal-oxide-semiconductor PM2 drain electrodes connection
It is grounded to the first N-type metal-oxide-semiconductor NM1 grids and by resistance R.
The threshold cell is used to form an one-way conduction branch road with the first p-type metal-oxide-semiconductor PM1, and can be somebody's turn to do by setting
In branch road the quantity of one-way conduction electronic component come reach limit conducting voltage function.Therefore, the threshold cell can adopt
With at least one diode being connected in series, or at least one p-type metal-oxide-semiconductor being connected in series, or at least one string
Join the N-type metal-oxide-semiconductor of connection.
In at least one diode, any diode cathode end is connected to form tandem junction with neighboring diode anode tap
Structure, the drain electrode end that first diode anode end is connected to the first p-type metal-oxide-semiconductor PM1 are the input of the threshold cell, finally
One diode cathode end ground connection is the output end of the threshold cell；
In at least one p-type metal-oxide-semiconductor, any p-type metal-oxide-semiconductor drain electrode end is connected shape with the source terminal of adjacent p-type metal-oxide-semiconductor
Into cascaded structure, the drain electrode end that the source electrode of first p-type metal-oxide-semiconductor is connected to the first p-type metal-oxide-semiconductor PM1 is the threshold value list
The input of member, the grounded drain of last p-type metal-oxide-semiconductor are the output end of the threshold cell, the grid of each p-type metal-oxide-semiconductor
It is connected with drain electrode；
In at least one N-type metal-oxide-semiconductor, any N-type metal-oxide-semiconductor source terminal is connected shape with the drain electrode end of adjacent N-type metal-oxide-semiconductor
Into cascaded structure, the drain electrode end that the drain electrode of first N-type metal-oxide-semiconductor is connected to the first p-type metal-oxide-semiconductor PM1 is the threshold value list
The input of member, the source ground of last N-type metal-oxide-semiconductor are the output end of the threshold cell, the grid of each N-type metal-oxide-semiconductor
It is connected with drain electrode.
The first embodiment structure chart of amplitude limiter circuit of the present invention is illustrated in figure 5, threshold cell is described in the embodiment
The 9th diode D9 being connected in series and the tenth diode D10, the 9th diode D9 positive poles are connected to the first p-type metal-oxide-semiconductor
PM1 drain electrode ends, its negative pole are connected to the tenth diode D10 positive poles, the tenth diode D10 negative poles ground connection.
The second embodiment structure chart of amplitude limiter circuit of the present invention is illustrated in figure 6, threshold cell is described in the embodiment
The 3rd p-type metal-oxide-semiconductor PM3 and the 4th p-type metal-oxide-semiconductor PM4 being connected in series, the 3rd p-type metal-oxide-semiconductor PM3 source electrodes are connected to the first P
Type metal-oxide-semiconductor PM1 drain electrode ends, its grid are connected to it and drain and be connected to the 4th p-type metal-oxide-semiconductor PM4 source electrodes, the 4th p-type MOS
Pipe PM4 grids are connected to it and drain and be grounded.
The 3rd embodiment structure chart of amplitude limiter circuit of the present invention is illustrated in figure 7, threshold cell is described in the embodiment
The 6th N-type metal-oxide-semiconductor NM6 and the 7th N-type metal-oxide-semiconductor NM7 being connected in series, the 6th N-type metal-oxide-semiconductor NM6 drain electrodes are connected to the first P
Type metal-oxide-semiconductor PM1 drain electrode ends, its grid are connected to its drain electrode end, and its source electrode is connected to the 7th N-type metal-oxide-semiconductor NM7 drain electrodes, the
Seven N-type metal-oxide-semiconductor NM7 grids are connected to its drain electrode, its source ground.
The present embodiment between voltage source and ground exemplified by concatenating the first p-type metal-oxide-semiconductor PM1 and threshold cell, then this is unidirectional
Conducting branches start the conducting voltage sum that voltage is the first p-type metal-oxide-semiconductor PM1 gate source voltages and threshold cell, can be by setting
Determine the diode of threshold cell, or the quantity of p-type metal-oxide-semiconductor or N-type metal-oxide-semiconductor to control the value of startup voltage, i.e.,：If desired antenna
The voltage at end starts amplitude limiter circuit in the case of relatively low, then less diode or metal-oxide-semiconductor is concatenated in the branch road, then each electricity
The conducting voltage sum of sub- component is small, works as V1During higher than the conducting voltage sum, the amplitude limiter circuit turns on and realizes electric leakage；Instead
It, if desired the voltage of antenna end just starts amplitude limiter circuit in the case of higher, then more diode is concatenated in the branch road
Or metal-oxide-semiconductor, make the increase of conducting voltage sum, work as V1During less than the conducting voltage sum, amplitude limiter circuit is not turned on, and electric charge is all poly-
Combine between first antenna end and the second antenna end, and be converted to higher direct-current power supply load circuit.
The another object of the embodiment of the present invention is to provide a kind of passive RFID for including above-mentioned active rectification control circuit,
It is described this it is passive radio-frequency identification labeled can carry out dynamic rectification control to the voltage between first antenna end and the second antenna end,
When the overtension, described active rectification control circuit can export the electric charge of antenna end to ground, so as to reduce antenna end
The quantity of electric charge, reduce the DC voltage that rectification goes out, prevent too high voltage from damaging load circuit, while also prevent card reader
End receives the generation of saturated phenomenon.
A further object of the embodiment of the present invention is to provide carries out continuous active rectification using above-mentioned passive RFID to circuit
The method of control, this method comprise the following steps：
A, resonant capacitance and resonant inductance are connected in parallel in first antenna end and the second antenna end, and coupled external electromagnetism
The alternating current rectification is DC current and exported extremely by field so as to produce alternating current and input to rectification circuit, rectification circuit
The power input V of amplitude limiter circuit1；
B, if power input V1 magnitude of voltage is less than the conducting voltage of the first p-type metal-oxide-semiconductor gate source voltage and threshold cell
Sum, then the first p-type metal-oxide-semiconductor and threshold cell be not turned on, the second p-type metal-oxide-semiconductor drain electrode output electric current be zero, then with the 2nd P
Voltage V caused by the resistance R of type metal-oxide-semiconductor concatenationRIt is zero, the first N-type metal-oxide-semiconductor was not turned on, to first antenna end and second day
The quantity of electric charge between line end does not impact；If power input V1 magnitude of voltage is more than the first p-type metal-oxide-semiconductor gate source voltage and threshold
The conducting voltage sum of value cell, then the first p-type metal-oxide-semiconductor and threshold cell are turned on so as to produce branch current, the first p-type MOS
Pipe is by the branch current mirror image to the second p-type metal-oxide-semiconductor and flows through the resistance R of series connection with it and produces voltage difference VRInput to the first N
Type metal-oxide-semiconductor grid, the first N-type metal-oxide-semiconductor is turned on, by the source electrode of the first N-type metal-oxide-semiconductor by first antenna end and the second antenna end
Between electric charge export to ground so that the quantity of electric charge between first antenna end and the second antenna end reduces；
C, the quantity of electric charge between first antenna end and the second antenna end reduces, then the alternating voltage at bridge rectifier both ends
Reduce, the dc source that its rectification goes out reduces, so as to realize that continuous, circulation active rectification is carried out to circuit voltage to be controlled；
The threshold cell is at least one diode being connected in series, at least one diode, any two pole
Tube cathode end is connected to form cascaded structure with neighboring diode anode tap, and the actual use quantity of the diode is by described humorous
The electric capacity that shakes determines with the caused size for coupling alternating current required for resonant inductance.
Claims (1)
- A kind of 1. method for carrying out continuous active rectification control to circuit using passive RFID, it is characterised in that this method includes Following steps：A, resonant capacitance and resonant inductance are connected in parallel in first antenna end and the second antenna end, and coupled external electromagnetic field from And produce alternating current and input to rectification circuit, rectification circuit and be DC current by the alternating current rectification and export to amplitude limit The power input V of circuit1；If b, power input V1Magnitude of voltage be less than the conducting voltage sum of the first p-type metal-oxide-semiconductor gate source voltage and threshold cell, Then the first p-type metal-oxide-semiconductor and threshold cell are not turned on, the second p-type metal-oxide-semiconductor drain electrode output electric current be zero, then with the second p-type MOS Voltage V caused by the resistance R of pipe concatenationRBe zero, the first N-type metal-oxide-semiconductor is not turned on, to first antenna end and the second antenna end it Between the quantity of electric charge do not impact；If power input V1Magnitude of voltage be more than the first p-type metal-oxide-semiconductor gate source voltage and threshold cell Conducting voltage sum, then the first p-type metal-oxide-semiconductor and threshold cell conducting so as to produce branch current, the first p-type metal-oxide-semiconductor should Branch current mirror image is to the second p-type metal-oxide-semiconductor and flows through the resistance R of series connection with it and produces voltage difference VRInput to the first N-type metal-oxide-semiconductor Grid, the first N-type metal-oxide-semiconductor is turned on, by the source electrode of the first N-type metal-oxide-semiconductor by between first antenna end and the second antenna end Electric charge is exported to ground so that the quantity of electric charge between first antenna end and the second antenna end reduces；C, the quantity of electric charge between first antenna end and the second antenna end reduces, then the alternating voltage at bridge rectifier both ends subtracts Small, the dc source that its rectification goes out reduces, so as to realize that continuous, circulation active rectification is carried out to circuit voltage to be controlled；The threshold cell is at least one diode being connected in series, and at least one diode, any diode is cloudy Extremely it is connected to form cascaded structure with neighboring diode anode tap, and the actual use quantity of the diode is by resonance electricity Hold with the caused size for coupling alternating current required for resonant inductance to determine.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410009153.2A CN103731046B (en) | 2014-01-08 | 2014-01-08 | A kind of active rectification control circuit and passive RFID and active rectification control method |
| PCT/CN2015/070136 WO2015103956A1 (en) | 2014-01-08 | 2015-01-06 | Dynamic rectification control circuit and passive rfid, and dynamic rectification control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410009153.2A CN103731046B (en) | 2014-01-08 | 2014-01-08 | A kind of active rectification control circuit and passive RFID and active rectification control method |
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| Publication Number | Publication Date |
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| CN103731046A CN103731046A (en) | 2014-04-16 |
| CN103731046B true CN103731046B (en) | 2017-11-14 |
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| CN201410009153.2A Active CN103731046B (en) | 2014-01-08 | 2014-01-08 | A kind of active rectification control circuit and passive RFID and active rectification control method |
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| CN (1) | CN103731046B (en) |
| WO (1) | WO2015103956A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103731046B (en) * | 2014-01-08 | 2017-11-14 | 卓捷创芯科技（深圳）有限公司 | A kind of active rectification control circuit and passive RFID and active rectification control method |
| CN104834955B (en) * | 2015-04-20 | 2017-11-14 | 卓捷创芯科技（深圳）有限公司 | A kind of rectification and the RF front-end circuit and passive RF label of load combinations of modulation |
| CN105299930A (en) * | 2015-11-10 | 2016-02-03 | 苏州美达瑞电子有限公司 | Water heater regulating system based on radio frequency identification |
| CN108152604A (en) * | 2016-12-05 | 2018-06-12 | 北京同方微电子有限公司 | A kind of non-contact card field strength detection circuit |
| CN108270469B (en) * | 2016-12-30 | 2023-06-30 | 丰郅(上海)新能源科技有限公司 | Electronic device capable of realizing near field wireless communication and self-checking method of oscillation circuit of electronic device |
| CN112288068B (en) | 2020-10-24 | 2024-02-27 | 卓捷创芯科技（深圳）有限公司 | Positive feedback latch amplitude limiting control circuit and method for passive radio frequency identification tag |
| CN113053442B (en) * | 2021-03-18 | 2024-04-02 | 华南师范大学 | Low-power-consumption EEPROM memory |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3900299B2 (en) * | 1994-10-06 | 2007-04-04 | 株式会社ルネサステクノロジ | Non-contact IC card |
| JPH10320519A (en) * | 1997-05-19 | 1998-12-04 | Rohm Co Ltd | Responder in ic card communication system |
| US8115597B1 (en) * | 2007-03-07 | 2012-02-14 | Impinj, Inc. | RFID tags with synchronous power rectifier |
| CN102456152B (en) * | 2010-11-01 | 2013-12-18 | 上海华虹Nec电子有限公司 | Power generation circuit for electronic tag of RFID (radio frequency identification) system |
| CN102244502A (en) * | 2011-04-25 | 2011-11-16 | 胡建国 | Automatic Q value adjustment amplitude limiting circuit |
| CN102364500B (en) * | 2011-10-18 | 2015-07-29 | 山东华翼微电子技术股份有限公司 | Passive RFID or contact type intelligent card chip dynamic frequency scalable circuit |
| CN202583439U (en) * | 2011-12-23 | 2012-12-05 | 国民技术股份有限公司 | Critical field intensity detection and protection circuit and radio frequency identification chip |
| CN103199814B (en) * | 2012-01-06 | 2017-03-15 | 上海华虹集成电路有限责任公司 | Amplitude limiter circuit in RF identification |
| CN103413168B (en) * | 2013-08-19 | 2016-06-08 | 电子科技大学 | The rectification amplitude limiter circuit of radio electronic label |
| CN104516381B (en) * | 2013-09-26 | 2016-04-27 | 上海华虹集成电路有限责任公司 | Regulator rectifier circuit in radio-frequency (RF) identification |
| CN103731046B (en) * | 2014-01-08 | 2017-11-14 | 卓捷创芯科技（深圳）有限公司 | A kind of active rectification control circuit and passive RFID and active rectification control method |
-
2014
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| WO2015103956A1 (en) | 2015-07-16 |
| CN103731046A (en) | 2014-04-16 |
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