CN107885304A - A kind of voltage jump detects circuit - Google Patents
A kind of voltage jump detects circuit Download PDFInfo
- Publication number
- CN107885304A CN107885304A CN201710972048.2A CN201710972048A CN107885304A CN 107885304 A CN107885304 A CN 107885304A CN 201710972048 A CN201710972048 A CN 201710972048A CN 107885304 A CN107885304 A CN 107885304A
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- Prior art keywords
- circuit
- electric capacity
- voltage
- power supply
- resistance
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/28—Supervision thereof, e.g. detecting power-supply failure by out of limits supervision
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/24—Resetting means
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Electronic Switches (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to a kind of voltage jump to detect circuit, and the voltage jump detection circuit includes discharge circuit and bleeder circuit；Wherein described bleeder circuit includes the second electric capacity C2 and the 3rd electric capacity C3 being connected in series with each other, and tie point is the output end of the bleeder circuit；Another termination master control power supply of the second electric capacity C2；The other end ground connection of the 3rd electric capacity C3；In the voltage cataclysm of the master control power supply, the output end of the bleeder circuit exports the first level signal；The discharge circuit includes the 4th resistance R4, and one end of the 4th resistance R4 is connected with the second electric capacity C2 one end for connecing power supply, and the other end of the 4th resistance R4 is connected and is grounded with the 3rd electric capacity C3 one end being grounded.Technical scheme provided by the invention, control signal can be provided in time, for subsequent treatment with Sensitive Detection power-supply fluctuation.
Description
The application is Chinese October 22 2015 applying date, and Application No. 201510694640.1 is entitled " a kind of electric
The divisional application of pressure abrupt climatic change circuit, reset circuit and electronic installation ".
Technical field
The present invention relates to electronic circuit field, and circuit is detected more specifically to a kind of voltage jump.
Background technology
At present, it is common application circuit in electricity field voltage detecting circuit, such as is using battery powered system
In, in order to protect battery, cell voltage is typically detected by MCU, by setting low-voltage protection point and protection unblock two electricity of point
Threshold value is pressed, compares the voltage threshold of the voltage value that detects and setting, the judgement of carry out state and makes corresponding response.Generally
Such detection circuit is higher to the sets requirement of voltage threshold, if it is too low to protect a unblock point voltage threshold to set, then
Fluctuated when voltage occurs abnormal, always between low-voltage protection point and protection unblock two voltage thresholds of point, control circuit is just
Reset repeatedly can be carried out to power supply circuit, if it is too high to protect a unblock point threshold value to set, after power supply circuit enters protection, is being solved
Certainly after circuit powerup issue, because actual power voltage not enough unlocks, cause power supply circuit cisco unity malfunction.
Not only have in the prior art has higher requirement to the various threshold values setting in detection circuit, and to testing result
Processing need by process chip and programming, design complexities are high, and cost is higher.
The content of the invention
The technical problem to be solved in the present invention is, for above mentioned problem in the prior art, there is provided a kind of voltage jump inspection
Slowdown monitoring circuit, reset circuit and electronic installation.
The technical solution adopted for the present invention to solve the technical problems is：Construct a kind of voltage jump detection circuit, reset
Circuit and electronic installation.
In voltage jump of the present invention detects circuit, including discharge circuit and bleeder circuit；Wherein
The bleeder circuit includes the second electric capacity C2 and the 3rd electric capacity C3 being connected in series with each other, and tie point is the partial pressure
The output end of circuit；Another termination master control power supply of the second electric capacity C2；The other end ground connection of the 3rd electric capacity C3；Institute
When stating the voltage cataclysm of master control power supply, the output end of the bleeder circuit exports the first level signal；
The discharge circuit includes the 4th resistance R4, and one end of the 4th resistance R4 connects power supply with the second electric capacity C2
One end connection, the other end of the 4th resistance R4 is connected and is grounded with the 3rd electric capacity C3 one end being grounded.
In reset circuit of the present invention, for being initialized to main control chip, the reset circuit includes driving
Dynamic circuit, execution circuit and above-mentioned voltage jump detection circuit；
The input of the drive circuit is connected with the output end of voltage jump detection circuit, the drive circuit
Output end is connected with the input of the execution circuit；When the input of the drive circuit receives first level signal
When, the output end of the drive circuit exports second electrical level signal to the execution circuit；
The input of the execution circuit is connected with the output end of the drive circuit, the output end of the execution circuit with
The reseting port connection of the main control chip；When the input of the execution circuit receives the second electrical level signal, institute
The output end for stating execution circuit exports reset signal to the reseting port.
Preferably, the drive circuit includes triode Q1, second resistance R2 and 3rd resistor R3；
The base stage of the triode Q1 be the drive circuit input, the extremely described drive of current collection of the triode Q1
The output end of dynamic circuit；
Output end of the base stage of the triode Q1 through the second resistance R2 connections bleeder circuit, the triode
Q1 colelctor electrode is connected with the input of the execution circuit, the grounded emitter of the triode Q1；
The base stage of the triode Q1 is grounded by the 3rd resistor R3.
Preferably, the execution circuit includes first resistor R1 and the first electric capacity C1；
One end of the first resistor R1 is connected with accessory power supply, and the other end is grounded by the first electric capacity C1；
The first resistor R1 and the first electric capacity C1 tie point are connected with the colelctor electrode of the triode Q1, as
The input of the execution circuit；
Reseting port of the first resistor R1 and the first electric capacity C1 tie point also with the main control chip is connected,
Output end as the execution circuit.
Preferably, the second electric capacity C2 and the 3rd electric capacity C3 of the bleeder circuit capacity are equal.
Preferably, the triode Q1 is NPN type triode.
Preferably, the master control power supply is replaceable battery.
Preferably, the main control chip is the one or more in single-chip microcomputer, ARM, DSP, CPU, FPGA.
In electronic installation of the present invention, including reset circuit and main control chip, the reset circuit are used for institute
State main control chip to be initialized, the reset circuit is the reset circuit described in any one above.
Preferably, the electronic installation includes battery-powered products.
Implement the voltage jump detection circuit of the present invention, have the advantages that：Can with Sensitive Detection power-supply fluctuation, and
When provide control signal, for subsequent treatment.
Further, in battery protection system, the reset of main control chip can be provided in time with Sensitive Detection power-supply fluctuation
Signal, simplify battery protecting circuit, it is cost-effective.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the circuit theory diagrams of voltage jump of embodiment of the present invention detection circuit；
Fig. 2 is the circuit theory diagrams of reset circuit of the embodiment of the present invention；
Fig. 3 be reset circuit of embodiment of the present invention VCC MCUPOWER RESET Q1 base stages measured waveform.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with accompanying drawing and specific implementation
Example, the present invention is described in further detail.It should be appreciated that specific embodiment described herein is only used for explaining this hair
It is bright, it is not intended to limit the present invention.
The present invention provides a kind of voltage jump detection circuit, meanwhile, reset circuit of the invention can also be used as common multiple
Position circuit is used, and using effect is not different with conventional reset circuit.This reset circuit is different from the place of conventional reset circuit
It is, conventional reset circuit is resetted dependent on the upper electricity of MCU power supplys itself, and this reset circuit can not only pass through such a mode
Reset, while can be resetted by the upper electric or a range of fluctuation of other power supplys.It is described in detail individually below.
As shown in figure 1, the voltage jump detection circuit of the embodiment of the present invention includes discharge circuit 1 and bleeder circuit 2.Its
In：
The bleeder circuit 2 includes the second electric capacity C2 and the 3rd electric capacity C3 being connected in series with each other, and tie point is bleeder circuit 2
Output end；Second electric capacity C2 another termination master control power supply；3rd electric capacity C3 other end ground connection；In the voltage of master control power supply
During cataclysm, the output end of bleeder circuit 2 exports the first level signal.Specifically, the second electric capacity C2, the 3rd electric capacity C3 are as partial pressure
Electric capacity, its pressure voltage are greater than battery maximum voltage, and capacity determines the time length of reset signal, and different capabilities also result in point
Press result different, amount of capacity is according to adjustment is actually needed, selection capacity identical electric capacity herein, i.e. bleeder circuit 2
Second electric capacity C2 and the 3rd electric capacity C3 capacity is equal.
The discharge circuit 1 includes the 4th resistance R4, and one end that the 4th resistance R4 one end connects power supply with the second electric capacity C2 connects
Connect, the 4th resistance R4 other end is connected and is grounded with the 3rd electric capacity C3 one end being grounded.
The realization principle of the voltage jump detection circuit of the embodiment of the present invention is to be based on following principle：Because electric capacity has isolation
Direct current, by the characteristic of alternating current, when larger voltage pulsation occurs in master control power supply, for electric capacity, similar to friendship
Electrical characteristics are flowed, now C2, C3 series connection partial pressure, the voltage of master control power supply are distributed according to capacitance.Voltage jump moment is assigned to
Voltage on C3 provides the first level signal, and the signal can be used for many aspects, and reset circuit herein is one of which
Using.Such as the voltage after AC rectification, after electric resistance partial pressure current limliting, capacitor filtering, if more than a tentering
The fluctuation of degree, circuit can also be detected by this voltage jump to detect.After the voltage stabilization of master control power supply, voltage is directly made
With on C2, now voltage is DC characteristic, is completely cut off by C2, it is impossible to is divided on C3.
The voltage jump detection circuit of the embodiment of the present invention, can provide control signal in time with Sensitive Detection power-supply fluctuation,
For subsequent treatment.
As shown in Fig. 2 the reset circuit of the embodiment of the present invention is used to initialize main control chip, the reset circuit bag
Include drive circuit 3, execution circuit 4 and above-mentioned voltage jump detection circuit.Wherein：
The input of the drive circuit 3 is connected with the output end of the bleeder circuit 2 of voltage jump detection circuit, drive circuit
3 output end is connected with the input of execution circuit 4；When the input of drive circuit 3 receives the first level signal, driving
The output end of circuit 3 exports second electrical level signal to execution circuit 4.Specific to the embodiment of the present invention, the embodiment of the present invention is answered
In the circuit of position, drive circuit 3 includes triode Q1, second resistance R2 and 3rd resistor R3；Triode Q1 base stage is driving electricity
The input on road 3, the output end of triode Q1 current collection extremely drive circuit 3；Triode Q1 base stage connects through second resistance R2
The output end of bleeder circuit 2 is connect, triode Q1 colelctor electrode is connected with the input of execution circuit 4, triode Q1 emitter stage
Ground connection；Triode Q1 base stage is grounded by 3rd resistor R3.Triode Q1 is NPN type triode.It should be understood that here
Drive circuit 3 is not limited to triode, can be substituted in theory with other circuits, triode is changed into other devices, such as
Direct MCU middle fracture after amplifier IC, or R3 shunt regulator tubes.Here drive circuit 3 is less demanding, if voltage change is very
Greatly, metal-oxide-semiconductor can be driven after partial pressure, i.e., C3 voltage is more than 2.5V after partial pressure, it is possible to is changed to metal-oxide-semiconductor.
The input of the execution circuit 4 is connected with the output end of drive circuit 3, output end and the master control core of execution circuit 4
The reseting port connection of piece；When the input of execution circuit 4 receives second electrical level signal, the output end of execution circuit 4 is defeated
Go out reset signal to reseting port.Specific to the embodiment of the present invention, in the reset circuit of the embodiment of the present invention, execution circuit 4 is wrapped
Include first resistor R1 and the first electric capacity C1；First resistor R1 one end is connected with accessory power supply, and the other end passes through the first electric capacity C1
Ground connection；First resistor R1 and the first electric capacity C1 tie point are connected with triode Q1 colelctor electrode, the input as execution circuit 4
End；First resistor R1 and the first electric capacity C1 tie point are also connected with the reseting port of main control chip, as the defeated of execution circuit 4
Go out end.
The realization principle of the reset circuit of the embodiment of the present invention is to be based on following principle：Because electric capacity has isolation direct current,
By the characteristic of alternating current, for the moment of inserting battery, the direct current of battery in itself is for electric capacity, equivalent to very of short duration
One mutation voltage, similar to alternating current characteristics, now the second electric capacity C2, the 3rd electric capacity C3 series connection partial pressure, by cell voltage root
Distributed according to capacitance.After battery is plugged, cell voltage is acted directly on the second electric capacity C2, and now cell voltage is direct current
Characteristic, completely cut off by the second electric capacity C2, it is impossible to be divided on the 3rd electric capacity C3.Inserting battery moment is assigned on the 3rd electric capacity C3 before
Voltage drives late-class circuit, reset signal is provided, until the 3rd electric capacity C3 electric quantity consumption finishes.If voltage is slowly varying,
Even if C3 has assigned to voltage, but C3 electricity can be released by R2, R3, be not enough to turn-on transistor, while R2, R3 also have
Certain effect for preventing malfunction.
The voltage assigned on 3rd electric capacity C3, triode Q1, three poles are driven by second resistance R2,3rd resistor R3 partial pressures
After pipe Q1 conductings, by the voltage pull-down on the first electric capacity C1, reset signal is produced, now because the isolation direct current of electric capacity acts on,
Second electric capacity C2 isolation input voltages continue to charge to the 3rd electric capacity C3, when the electricity on the 3rd electric capacity C3 passes through second resistance
R2,3rd resistor R3 run out of, triode Q1 cut-offs, and the first electric capacity C1 is by first resistor R1 by MCU power source charges, reset knot
Beam.4th resistance R4 is the electricity released on the second electric capacity C2 while battery is changed, if do not released, cell voltage with
Voltage on second electric capacity C2 can be offset, and cause that the 3rd electric capacity C3 or branch pressure voltage deficiency can not be divided to, it is impossible to drive three
Pole pipe.
Further, master control power supply is replaceable battery.Further, main control chip be single-chip microcomputer, ARM, DSP,
One or more in CPU, FPGA.
After Fig. 3 shows that battery low-voltage variation and cell voltage go up to terminate, by change battery MCU resets VCC,
MCUPOWER, RESET, triode Q1 base stages actual waveform.Passage 1 represents VCC waveforms, and passage 2 represents MCUPOWER waveforms,
Passage 3 represents RESET waveforms, and passage 4 represents triode Q1 base stage waveforms.
Represent cell voltage as shown in figure 3, passage 1 represents VCC voltages, during actual use, by oscillogram it can be seen that,
VCC voltages have decreased to about 8V in 650ms by 12V, now, the MCU voltage 5V that passage 2 represents, also no any change,
If using conventional reset circuit, now battery altering completion, does not reset but.And the present invention is used, due to changing battery,
VCC rises to 12V.Passage 3 represents resetting pin RESET waveforms.Passage 4 represents transistor base voltage, also approximately equal to the 3rd
Voltage on electric capacity C3.While VCC voltages rise, the 3rd electric capacity C3 divides to obtain voltage, triode Q1 is driven, by the ripple of passage 4
Shape can show that C3 divides to obtain voltage about 0.8V, drive triode about 20ms, now produce a reset level, maintain about 10ms.
Battery is changed with speed quickly, time about 650ms, power end is due to the presence voltage pulsation about 5V of electric capacity, MCU power ends
Due to the effect of electric capacity, voltage is unchanged, and common reset circuit can not play a role, and can be answered rapidly by the present invention, MCU
Position, reach simplified battery protection program, protect the purpose of battery, while circuit structure is simple, cost is cheap, and using effect can
Lean on.
The present invention also provides a kind of electronic installation, including reset circuit and main control chip, and reset circuit is used for master control core
Piece is initialized, and reset circuit is the reset circuit described in any one above.Preferably, the electronic installation supplies including battery
Electric product.
It should be understood that above example only expresses the preferred embodiment of the present invention, it describes more specific and detailed
Carefully, but the limitation to the scope of the claims of the present invention therefore can not be interpreted as；It should be pointed out that the common skill for this area
For art personnel, without departing from the inventive concept of the premise, independent assortment can be carried out to above-mentioned technical characterstic, can also done
Go out several modifications and improvements, these belong to protection scope of the present invention；Therefore, it is all to be done with scope of the invention as claimed
Equivalents and modification, the covering scope of the claims in the present invention all should be belonged to.
Claims (3)
1. a kind of voltage jump detects circuit, it is characterised in that the voltage jump detection circuit includes discharge circuit and partial pressure
Circuit；Wherein
The bleeder circuit includes the second electric capacity C2 and the 3rd electric capacity C3 being connected in series with each other, and tie point is the bleeder circuit
Output end；Another termination master control power supply of the second electric capacity C2；The other end ground connection of the 3rd electric capacity C3；In the master
When controlling the voltage cataclysm of power supply, the output end of the bleeder circuit exports the first level signal；
The discharge circuit includes the 4th resistance R4, and one end of the 4th resistance R4 connects the one of power supply with the second electric capacity C2
End connection, the other end of the 4th resistance R4 are connected and are grounded with the 3rd electric capacity C3 one end being grounded.
2. voltage jump according to claim 1 detects circuit, it is characterised in that second electricity of the bleeder circuit
The capacity for holding C2 and the 3rd electric capacity C3 is equal.
3. voltage jump according to claim 1 detects circuit, it is characterised in that the master control power supply is replaceable electricity
Pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710972048.2A CN107885304B (en) | 2015-10-22 | 2015-10-22 | Voltage sudden change detection circuit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510694640.1A CN105242766B (en) | 2015-10-22 | 2015-10-22 | A kind of voltage jump detection circuit, reset circuit and electronic installation |
| CN201710972048.2A CN107885304B (en) | 2015-10-22 | 2015-10-22 | Voltage sudden change detection circuit |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510694640.1A Division CN105242766B (en) | 2015-10-22 | 2015-10-22 | A kind of voltage jump detection circuit, reset circuit and electronic installation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107885304A true CN107885304A (en) | 2018-04-06 |
| CN107885304B CN107885304B (en) | 2021-03-30 |
Family
ID=55040439
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510694640.1A Expired - Fee Related CN105242766B (en) | 2015-10-22 | 2015-10-22 | A kind of voltage jump detection circuit, reset circuit and electronic installation |
| CN201710972048.2A Active CN107885304B (en) | 2015-10-22 | 2015-10-22 | Voltage sudden change detection circuit |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510694640.1A Expired - Fee Related CN105242766B (en) | 2015-10-22 | 2015-10-22 | A kind of voltage jump detection circuit, reset circuit and electronic installation |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN105242766B (en) |
| WO (1) | WO2017067306A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242766B (en) * | 2015-10-22 | 2017-11-28 | 深圳拓邦股份有限公司 | A kind of voltage jump detection circuit, reset circuit and electronic installation |
| CN107168814A (en) * | 2017-06-22 | 2017-09-15 | 芯海科技（深圳）股份有限公司 | A kind of device and method for solving system in case of system halt |
| CN107800168B (en) * | 2017-11-07 | 2023-05-26 | 莱克电气股份有限公司 | Battery protection circuit and cordless electric tool |
| CN111014084A (en) * | 2019-12-09 | 2020-04-17 | 深圳市众能达自动化设备有限公司 | Detection circuit and detection method for internal flashover of capacitor or battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1407701A (en) * | 2001-08-17 | 2003-04-02 | Tdk株式会社 | Switch power supply device |
| CN1845414A (en) * | 2006-04-27 | 2006-10-11 | 北京中星微电子有限公司 | Protection circuit for resisting power supply abrupt change |
| CN102255549A (en) * | 2011-07-20 | 2011-11-23 | 珠海金电电源工业有限公司 | Switching power supply application circuit |
| US20140317432A1 (en) * | 2013-04-19 | 2014-10-23 | Kool Chip, Inc. | Methods and Systems for Receiver Detection on a PCI-Express Bus |
| CN204290287U (en) * | 2014-11-26 | 2015-04-22 | 北京寓乐世界教育科技有限公司 | A kind of Micro Energy Lose protective circuit of contest robot master controller |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100530320C (en) * | 2006-04-28 | 2009-08-19 | 鸿富锦精密工业（深圳）有限公司 | Electric voltage detecting circuit and electric discharge lamp driven apparatus using same |
| US7782582B2 (en) * | 2007-12-19 | 2010-08-24 | Mindspeed Technologies, Inc. | High voltage tolerant electrostatic discharge protection circuit |
| CN203658448U (en) * | 2013-12-18 | 2014-06-18 | 上海思瑞在线监测技术有限公司 | Overvoltage monitoring sensor for bushing |
| CN104020705A (en) * | 2014-06-23 | 2014-09-03 | 苏州塔可盛电子科技有限公司 | Power monitoring circuit with resetting function |
| CN105242766B (en) * | 2015-10-22 | 2017-11-28 | 深圳拓邦股份有限公司 | A kind of voltage jump detection circuit, reset circuit and electronic installation |
| CN205139833U (en) * | 2015-10-22 | 2016-04-06 | 深圳拓邦股份有限公司 | Voltage jump detection circuitry , reset circuit and electron device |
-
2015
- 2015-10-22 CN CN201510694640.1A patent/CN105242766B/en not_active Expired - Fee Related
- 2015-10-22 CN CN201710972048.2A patent/CN107885304B/en active Active
-
2016
- 2016-08-16 WO PCT/CN2016/095497 patent/WO2017067306A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1407701A (en) * | 2001-08-17 | 2003-04-02 | Tdk株式会社 | Switch power supply device |
| CN1845414A (en) * | 2006-04-27 | 2006-10-11 | 北京中星微电子有限公司 | Protection circuit for resisting power supply abrupt change |
| CN102255549A (en) * | 2011-07-20 | 2011-11-23 | 珠海金电电源工业有限公司 | Switching power supply application circuit |
| US20140317432A1 (en) * | 2013-04-19 | 2014-10-23 | Kool Chip, Inc. | Methods and Systems for Receiver Detection on a PCI-Express Bus |
| CN204290287U (en) * | 2014-11-26 | 2015-04-22 | 北京寓乐世界教育科技有限公司 | A kind of Micro Energy Lose protective circuit of contest robot master controller |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017067306A1 (en) | 2017-04-27 |
| CN105242766B (en) | 2017-11-28 |
| CN107885304B (en) | 2021-03-30 |
| CN105242766A (en) | 2016-01-13 |
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