CN108054809A - Wireless charging circuit based on electronic tag - Google Patents
Wireless charging circuit based on electronic tag Download PDFInfo
- Publication number
- CN108054809A CN108054809A CN201810066263.0A CN201810066263A CN108054809A CN 108054809 A CN108054809 A CN 108054809A CN 201810066263 A CN201810066263 A CN 201810066263A CN 108054809 A CN108054809 A CN 108054809A
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- 230000003750 conditioning effect Effects 0.000 claims abstract description 33
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 9
- 230000004044 response Effects 0.000 claims abstract description 5
- 230000005611 electricity Effects 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 abstract description 9
- 230000033228 biological regulation Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- H02J7/025—
-
- 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
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/0772—Physical layout of the record carrier
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- H02J5/005—
Abstract
The present invention proposes a kind of wireless charging circuit based on electronic tag, the former tag coil circuit of battery charger connection；Former tag coil loop response generates electric current in the electromagnetic signal of reader coil antenna, and charges to battery charger；Signal conditioning circuit is connected in parallel between former tag coil circuit and battery charger, and the radiofrequency signal in former tag coil circuit is transformed into direct current signal is transmitted to battery charger；Battery charger includes regulator circuit, starting switch pipe and rechargeable battery；Regulator circuit connects signal conditioning circuit, receives direct current signal and carries out voltage stabilizing and provide startup level；The non-controlling both ends of starting switch pipe are connected on the link circuit of regulator circuit and rechargeable battery, when the output level of the startup level output end of regulator circuit reaches and starts level, are turned on starting switch pipe, are charged so as to turn on link circuit to rechargeable battery.Wireless charging can be conveniently realized, and the Communication Jamming to tag coil can be reduced.
Description
Technical field
The present invention relates to charging circuit technology more particularly to a kind of wireless charging circuits based on electronic tag.
Background technology
At present, RFID (radio frequency identification) technology etc. is widely used, label usually with read-write system (or read
Write device, card reader etc.) it is used cooperatively, it, can be between read-write system after label enters the magnetic field of read-write system antenna transmitting
Radio communication is carried out, realizes " swiping the card " record.Whether there is according to inside tags power supply, RFID label tag is divided into passive type, semi-passive
(also referred to as semi-active type), active three classes.Unlike passive type and semi-passive, active tag has inside in itself
Power supply unit, to supply power supply needed for internal IC to generate external signal.
Current tag-powered mode is that the additional battery that charger is set to come in label charges, in this mode
It needs to carry charger at one's side and to ensure having chargeable place, it is very inconvenient；Or charge coil is additionally set
Sense external coil transmission and the wireless signal that arrives realizes wireless charging, but charge coil can be to label in this mode
The performance of coil has an impact, and the communication with read-write system is caused to be interfered.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of wireless charging circuit based on electronic tag, it is convenient to
It realizes wireless charging, and the Communication Jamming to tag coil can be reduced.
To solve the above problems, the present invention proposes a kind of wireless charging circuit based on electronic tag, including：Former label line
Enclose circuit, signal conditioning circuit and battery charger；
The battery charger connection former tag coil circuit；The original tag coil loop response is in reader
The electromagnetic signal of coil antenna and generate electric current, and charge to the battery charger；
The signal conditioning circuit is connected in parallel between the former tag coil circuit and the battery charger, to incite somebody to action
The radiofrequency signal in the original tag coil circuit is transformed into direct current signal and is transmitted to the battery charger；
The battery charger includes regulator circuit, starting switch pipe and rechargeable battery；The regulator circuit connects institute
Signal conditioning circuit is stated, the direct current signal is received and carries out voltage stabilizing and startup level is provided；The non-controlling of the starting switch pipe
Both ends are connected on the link circuit of the regulator circuit and rechargeable battery, and the control terminal connection of the starting switch pipe is described steady
The startup level output end of volt circuit reaches startup level in the output level of the startup level output end of the regulator circuit
When, the starting switch pipe is turned on, is charged so as to turn on the link circuit to the rechargeable battery.
According to one embodiment of present invention, the regulator circuit includes zener diode and first resistor；The voltage stabilizing
The anode of diode is connected with the first end of the first resistor, and the cathode of the zener diode connects the signal condition electricity
The outlet side anode on road, the second end of the first resistor connect the outlet side cathode of the signal conditioning circuit；Described first
The first end of resistance is also connected with the control terminal of the starting switch pipe.
According to one embodiment of present invention, the control terminal of the starting switch pipe connects described first by second resistance
The first end of resistance, the first end of the starting switch pipe connect the cathode of the rechargeable battery, and the of the starting switch pipe
Two ends connect the second end of the first resistor.
According to one embodiment of present invention, the battery charger further includes 3rd resistor and light emitting diode；Institute
The anode for stating light emitting diode connects the cathode of the rechargeable battery, and the cathode of the light emitting diode connects the starting switch
The first end of pipe；The 3rd resistor is connected in parallel on the both ends of the light emitting diode.
According to one embodiment of present invention, the battery charger further includes the first diode；First diode
Anode connects the cathode of the zener diode, and the cathode of the first diode connects the anode of the rechargeable battery.
According to one embodiment of present invention, the former tag coil circuit include connecting into the tag coil in circuit and
RFID chip and first capacitance in parallel with the tag coil.
According to one embodiment of present invention, the signal conditioning circuit is half-wave rectifying circuit, the halfwave rectifier electricity
Road includes the second diode and the second capacitance；The anode of second diode connects the first end of the tag coil, described
The cathode of second diode connects the first end of second capacitance and as the outlet side anode of signal conditioning circuit；Described
The second end of two capacitances connects the second end of the tag coil and as the outlet side cathode of signal conditioning circuit.
According to one embodiment of present invention, the signal conditioning circuit further includes the 3rd capacitance, is serially connected in the label
In the circuit that coil and RFID chip are linked to be, the connected factor that the RFID chip is adjusted in the 3rd capacitance is adjusted.
According to one embodiment of present invention, the signal conditioning circuit is voltage-doubling boost circuit, the voltage-doubling boost electricity
Road includes the 4th capacitance, the 3rd diode, the 4th diode and the 5th capacitance；The first end of 4th capacitance connects the mark
The first end of coil is signed, the second end of the 4th capacitance connects the anode of the 3rd diode；The cathode connection of 3rd diode
The first end of 5th capacitance and as the outlet side anode of signal conditioning circuit；The second end of 5th capacitance connects the mark
Sign the second end of coil and as the outlet side cathode of signal conditioning circuit；The anode connection the described 5th of 4th diode
The second end of capacitance, the cathode of the 4th diode connect the second end of the 4th capacitance.
According to one embodiment of present invention, the access system that the battery charger is adjusted in the 4th capacitance is adjusted
Number.
After adopting the above technical scheme, the present invention has the advantages that compared with prior art：
Charging circuit has been connected in parallel on former tag coil circuit, can realize wireless charging function, it is additional without increasing
Charger, just can realize the supplement of the energy content of battery during label communicates, can without additional charge coil is set
Charge coil is avoided to influence the performance of tag coil；Regulator circuit has certain voltage stabilizing process, by starting level to filling
The control of electricity triggering, only regulator circuit have reached certain voltage of voltage regulation, just start and charge, can reduce charging circuit to label
Communication interference between read-write system.
Description of the drawings
Fig. 1 is the electrical block diagram of the wireless charging circuit based on electronic tag of one embodiment of the invention；
Fig. 2 is the electrical block diagram of the wireless charging circuit based on electronic tag of another embodiment of the present invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
Many details are elaborated in the following description in order to fully understand the present invention.But the present invention can be with
Much implement different from other manner described here, those skilled in the art can be in the situation without prejudice to intension of the present invention
Under do similar popularization, therefore the present invention is not limited to the specific embodiments disclosed below.
In one embodiment, the present invention proposes a kind of wireless charging circuit based on electronic tag, including：Former label line
Enclose circuit, signal conditioning circuit and battery charger.Former tag coil circuit can be that existing electronic tag Central Plains originally has
Tag coil circuit, coil can realize the sensing transmitting-receiving of electromagnetic wave, so as to fulfill label chip and external read-write system
Between wireless signal communication.
The battery charger connection former tag coil circuit, surely not influences former tag coil circuit in itself
Connection relation.The original tag coil loop response generates electric current in the electromagnetic signal of reader coil antenna, and to institute
Battery charger is stated to charge.When former tag coil circuit is in the readable range of read-write system, it may occur that communication,
Thus former tag coil circuit can generate corresponding electric current due to electromagnetic induction.For example, when electronic tag is swiped the card to read-write system
When, the moment swiped the card can generate electromagnetic signal, so as to charge to the rechargeable battery in it.
The signal conditioning circuit is connected in parallel between the former tag coil circuit and the battery charger, to incite somebody to action
The radiofrequency signal in the original tag coil circuit is transformed into direct current signal and is transmitted to the battery charger.Due to former label line
What is generated in circle circuit is the radiofrequency signal generated due to electromagnetism, that is, AC signal, thus signal conditioning circuit is by radio frequency
Signal is converted to direct current signal, to be suitable for charging to rechargeable battery, can also play some other functions certainly.
Referring to Fig. 1 and Fig. 2, the battery charger includes regulator circuit, starting switch pipe Q1 and rechargeable battery U2.Institute
It states regulator circuit and connects the signal conditioning circuit, receive the direct current signal and carry out voltage stabilizing and startup level is provided, start electricity
The flat situation that can reflect voltage of voltage regulation, the value of voltage of voltage regulation can be less than by starting level.Rechargeable battery U2 for example can be
Lithium battery.Regulator circuit is specifically unlimited.
The non-controlling both ends of the starting switch pipe Q1 are connected to the link circuit of the regulator circuit and rechargeable battery U2
On, the control terminal of the starting switch pipe Q1 connects the startup level output end of the regulator circuit.Starting switch pipe Q1 can be with
It is triode, MOS transistor etc., as long as the switching tube that can be turned on when the level of control terminal reaches and starts level is equal
It is applicable in.Starting switch pipe Q1, which is not up to, starts the state that level is then held off.It is exported in the startup level of the regulator circuit
When the output level at end reaches startup level, the starting switch pipe Q1 is turned on, is filled so as to turn on the link circuit to described
Battery U2 charges, as long as that is, the level of the startup level output end output of regulator circuit has reached startup level,
It can start to start and charge, otherwise not start.
Charging circuit has been connected in parallel on former tag coil circuit, can realize wireless charging function, it is additional without increasing
Charger, just can realize the supplement of the energy content of battery during label communicates, can without additional charge coil is set
Charge coil is avoided to influence the performance of tag coil；Regulator circuit has certain voltage stabilizing process, by starting level to filling
The control of electricity triggering, only regulator circuit have reached certain voltage of voltage regulation, just start and charge, can reduce charging circuit to label
Communication interference between read-write system.
With continued reference to Fig. 1 and Fig. 2, it is preferred that the regulator circuit includes zener diode D3 and first resistor R3.It is described
The anode of zener diode D3 is connected with the first end of the first resistor R3, described in the cathode connection of the zener diode D3
The outlet side anode of signal conditioning circuit, the outlet side of the second end connection signal conditioning circuit of the first resistor R3 are born
Pole；The first end of the first resistor R3 is also connected with the control terminal of the starting switch pipe Q1, i.e. the first end of first resistor R3
It is the startup level output end of regulator circuit.It is appreciated that the regulator circuit of the present embodiment is only an example, may be used also certainly
To be other regulator circuits or make certain improvements on this basis, such as first resistor R3 is expanded into resistance net etc.
It is unlimited.
Preferably, the control terminal of the starting switch pipe Q1 passes through the first of the second resistance R2 connections first resistor R3
End, the first end of the starting switch pipe Q1 connect the cathode of the rechargeable battery U2, the second end of the starting switch pipe Q1
Connect the second end of the first resistor R3.In fig. 1 and 2, starting switch pipe Q1 is a NPN triode, and emitter connects
The cathode of rechargeable battery U2, the second end of collector connection first resistor R3, base stage (control terminal) are connected by second resistance R2
The first end of first resistor R3.
In one embodiment, with continued reference to Fig. 1 and Fig. 2, the battery charger further includes 3rd resistor R7 and hair
Optical diode D4.The anode of the light emitting diode D4 connects the cathode of the rechargeable battery U2, the light emitting diode D4's
Cathode connects the first end of the starting switch pipe Q1；When reaching startup voltage, starting switch pipe Q1 conductings, light emitting diode
D4 is accessed in cell circuit, can be by the brightness change of light emitting diode D4 come straight so as to shine in charging process
The size that ground obtains charging current is seen, knows current charging rate, can disconnect suitable when and charge.The 3rd resistor
R7 is connected in parallel on the both ends of the light emitting diode D4；3rd resistor R7 can reduce the brightness of light emitting diode D4, avoid brightness
It crosses bright.
In one embodiment, with continued reference to Fig. 1 and Fig. 2, the battery charger further includes the first diode D2.The
The anode of one diode D2 connects the cathode of the zener diode D3, and the cathode of the first diode D2 connects the rechargeable battery
The anode of U2.First diode D2 can prevent rechargeable battery U2 electric currents from pouring in down a chimney.In fig. 1 and 2, the first diode D2 is being just
A resistance R1 is also connected between the cathode of pole and zener diode D3, current limliting can be used for, label chip is with reading when ensureing to charge
Write the normal communication of system.
In one embodiment, with continued reference to Fig. 1 and Fig. 2, the original tag coil circuit includes connecting into the mark in circuit
Sign the coil CO2 and RFID chip U1 and first capacitance C1 in parallel with the tag coil CO2.Tag coil CO2 and read-write are
The coil CO1 of uniting is antenna, is communicated between the two by electromagnetic induction, tag coil CO2 in response to read-write system coil CO1 and
Radiofrequency signal is generated in the loop, so as to transmit corresponding signal into RFID chip U1, is started simultaneously to battery charger
Transmission signal.First capacitance C1 can play the role of adjusting resonance, can replace the first capacitance C1 of different sizes.
In one embodiment, referring to Fig. 1, the signal conditioning circuit is half-wave rectifying circuit, passes through halfwave rectifier electricity
Road can realize transformation of the radiofrequency signal to direct current signal.The half-wave rectifying circuit includes the second diode D1 and the second capacitance
C2；The anode of the second diode D1 connects the first end of the tag coil CO2, and the cathode of the second diode D1 connects
Connect the first end of the second capacitance C2 and as the outlet side anode of signal conditioning circuit；The second end of the second capacitance C2
Connect the second end of the tag coil CO2 and as the outlet side cathode of signal conditioning circuit.
Further, in Fig. 1, the signal conditioning circuit can also include the 3rd capacitance C3.3rd capacitance C3 is concatenated
In the circuit being linked to be in the tag coil CO2 and RFID chip U1, the outlet line of RFID chip U1 is specifically connected to
On.The size of the 3rd capacitance C3 is adjusted, the connected factor of the RFID chip U1 is adjusted so that RFID chip U1 and mark
Sign the resonance frequency matches of coil CO2.
In one embodiment, referring to Fig. 2, the signal conditioning circuit is voltage-doubling boost circuit, passes through voltage-doubling boost electricity
Road is amplified voltage while can realizing rectification.The voltage-doubling boost circuit includes the 4th capacitance C4, the 3rd diode
D5, the 4th diode D8 and the 5th capacitance C6；The first end of the 4th capacitance C4 connects the first of the tag coil CO2
End, the second end of the 4th capacitance C4 connect the anode of the 3rd diode D5；The cathode connection described the of 3rd diode D5
The first end of five capacitance C6 and as the outlet side anode of signal conditioning circuit；The second end of 5th capacitance C6 connects the label
The second end of coil CO2 and as the outlet side cathode of signal conditioning circuit；Described in the anode connection of the 4th diode D8
The second end of 5th capacitance C6, the cathode of the 4th diode D8 connect the second end of the 4th capacitance C4.
Preferably, in Fig. 2, the access system of the battery charger is adjusted in the size for adjusting the 4th capacitance C4
Number, when battery charger changes, thus it is possible to vary the size of the 4th capacitance C4 realizes the tune of battery charger connected factor
It is whole.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting claim, any this field
Technical staff without departing from the spirit and scope of the present invention, can make possible variation and modification, therefore the present invention
Protection domain should be subject to the scope that the claims in the present invention are defined.
Claims (10)
1. a kind of wireless charging circuit based on electronic tag, which is characterized in that including：Former tag coil circuit, signal condition
Circuit and battery charger；
The battery charger connection former tag coil circuit；The original tag coil loop response is in reader coil
The electromagnetic signal of antenna and generate electric current, and charge to the battery charger；
The signal conditioning circuit is connected in parallel between the former tag coil circuit and the battery charger, to by described in
The radiofrequency signal in former tag coil circuit is transformed into direct current signal and is transmitted to the battery charger；
The battery charger includes regulator circuit, starting switch pipe and rechargeable battery；The regulator circuit connects the letter
Number modulate circuit receives the direct current signal and carries out voltage stabilizing and provide startup level；The non-controlling both ends of the starting switch pipe
It is connected on the link circuit of the regulator circuit and rechargeable battery, the control terminal of the starting switch pipe connects the voltage stabilizing electricity
The startup level output end on road when the output level of the startup level output end of the regulator circuit reaches and starts level, is led
Lead to the starting switch pipe, charge so as to turn on the link circuit to the rechargeable battery.
2. the wireless charging circuit based on electronic tag as described in claim 1, which is characterized in that the regulator circuit includes
Zener diode and first resistor；The anode of the zener diode is connected with the first end of the first resistor, the voltage stabilizing
The cathode of diode connects the outlet side anode of the signal conditioning circuit, and the second end of the first resistor connects the signal
The outlet side cathode of modulate circuit；The first end of the first resistor is also connected with the control terminal of the starting switch pipe.
3. the wireless charging circuit based on electronic tag as claimed in claim 2, which is characterized in that the starting switch pipe
Control terminal connects the first end of the first resistor by second resistance, and the first end of the starting switch pipe connects the charging
The cathode of battery, the second end of the starting switch pipe connect the second end of the first resistor.
4. the wireless charging circuit based on electronic tag as claimed in claim 3, which is characterized in that the battery charger
Further include 3rd resistor and light emitting diode；The anode of the light emitting diode connects the cathode of the rechargeable battery, the hair
The cathode of optical diode connects the first end of the starting switch pipe；The 3rd resistor is connected in parallel on the two of the light emitting diode
End.
5. the wireless charging circuit based on electronic tag as claimed in claim 3, which is characterized in that the battery charger
Further include the first diode；The anode of first diode connects the cathode of the zener diode, and the cathode of the first diode connects
Connect the anode of the rechargeable battery.
6. the wireless charging circuit based on electronic tag as described in claim 1, which is characterized in that the original tag coil is returned
Road includes connecting into the tag coil in circuit and RFID chip and first capacitance in parallel with the tag coil.
7. the wireless charging circuit based on electronic tag as claimed in claim 6, which is characterized in that the signal conditioning circuit
For half-wave rectifying circuit, the half-wave rectifying circuit includes the second diode and the second capacitance；The anode of second diode
The first end of the tag coil is connected, the cathode of second diode connects the first end of second capacitance and as letter
The outlet side anode of number modulate circuit；The second end of second capacitance connects the second end of the tag coil and as signal
The outlet side cathode of modulate circuit.
8. the wireless charging circuit based on electronic tag as claimed in claim 7, which is characterized in that the signal conditioning circuit
The 3rd capacitance is further included, is serially connected in the circuit that the tag coil and RFID chip are linked to be, adjusting the 3rd capacitance can
Adjust the connected factor of the RFID chip.
9. the wireless charging circuit based on electronic tag as claimed in claim 6, which is characterized in that the signal conditioning circuit
For voltage-doubling boost circuit, the voltage-doubling boost circuit includes the 4th capacitance, the 3rd diode, the 4th diode and the 5th capacitance；
The first end of 4th capacitance connects the first end of the tag coil, and the second end of the 4th capacitance connects the three or two pole
The anode of pipe；The cathode of 3rd diode connect the first end of the 5th capacitance and outlet side as signal conditioning circuit just
Pole；The second end of 5th capacitance connects the second end of the tag coil and as the outlet side cathode of signal conditioning circuit；Institute
The anode for stating the 4th diode connects the second end of the 5th capacitance, cathode connection the 4th electricity of the 4th diode
The second end of appearance.
10. the wireless charging circuit based on electronic tag as claimed in claim 9, which is characterized in that adjustment the 4th electricity
Hold the connected factor that the battery charger is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810066263.0A CN108054809A (en) | 2018-01-23 | 2018-01-23 | Wireless charging circuit based on electronic tag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810066263.0A CN108054809A (en) | 2018-01-23 | 2018-01-23 | Wireless charging circuit based on electronic tag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108054809A true CN108054809A (en) | 2018-05-18 |
Family
ID=62124507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810066263.0A Pending CN108054809A (en) | 2018-01-23 | 2018-01-23 | Wireless charging circuit based on electronic tag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108054809A (en) |
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| CN2741087Y (en) * | 2004-10-27 | 2005-11-16 | 华为技术有限公司 | Overvoltage and undervoltage slow start protecting circuit of negative power supply |
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| CN201215662Y (en) * | 2008-06-26 | 2009-04-01 | 上海工程技术大学 | Passive electronic label based on wireless transmission |
| CN203813502U (en) * | 2014-04-04 | 2014-09-03 | 深圳市金溢科技股份有限公司 | Intelligent power management chip realizing wireless charge and ultra-thin on-board unit |
| CN104753326A (en) * | 2015-04-09 | 2015-07-01 | 广东工业大学 | AC-DC (alternating current-direct current) drive output filter capacitor quick active leakage circuit |
| CN204578058U (en) * | 2015-03-23 | 2015-08-19 | 石家庄开发区天远科技有限公司 | A kind of vehicle-mounted high-voltage turn-off circuit |
| CN206133636U (en) * | 2016-08-24 | 2017-04-26 | 中国神华能源股份有限公司 | Active electronic label |
| CN207677488U (en) * | 2018-01-23 | 2018-07-31 | 北京今日天鸿医疗器械制造有限公司 | Wireless charging circuit based on electronic tag |
-
2018
- 2018-01-23 CN CN201810066263.0A patent/CN108054809A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2741087Y (en) * | 2004-10-27 | 2005-11-16 | 华为技术有限公司 | Overvoltage and undervoltage slow start protecting circuit of negative power supply |
| CN2757400Y (en) * | 2004-12-29 | 2006-02-08 | 长春一汽启明信息技术股份有限公司 | Power module special for automobile |
| CN200976485Y (en) * | 2006-11-30 | 2007-11-14 | 青岛海信电器股份有限公司 | Under-voltage protection circuitry |
| KR20070088423A (en) * | 2007-07-27 | 2007-08-29 | 순천대학교 산학협력단 | Active rfid tag with wireless battery charger |
| CN201215662Y (en) * | 2008-06-26 | 2009-04-01 | 上海工程技术大学 | Passive electronic label based on wireless transmission |
| CN203813502U (en) * | 2014-04-04 | 2014-09-03 | 深圳市金溢科技股份有限公司 | Intelligent power management chip realizing wireless charge and ultra-thin on-board unit |
| CN204578058U (en) * | 2015-03-23 | 2015-08-19 | 石家庄开发区天远科技有限公司 | A kind of vehicle-mounted high-voltage turn-off circuit |
| CN104753326A (en) * | 2015-04-09 | 2015-07-01 | 广东工业大学 | AC-DC (alternating current-direct current) drive output filter capacitor quick active leakage circuit |
| CN206133636U (en) * | 2016-08-24 | 2017-04-26 | 中国神华能源股份有限公司 | Active electronic label |
| CN207677488U (en) * | 2018-01-23 | 2018-07-31 | 北京今日天鸿医疗器械制造有限公司 | Wireless charging circuit based on electronic tag |
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