CN105738835B - Power source loads test device - Google Patents
Power source loads test device Download PDFInfo
- Publication number
- CN105738835B CN105738835B CN201610012435.7A CN201610012435A CN105738835B CN 105738835 B CN105738835 B CN 105738835B CN 201610012435 A CN201610012435 A CN 201610012435A CN 105738835 B CN105738835 B CN 105738835B
- Authority
- CN
- China
- Prior art keywords
- electric current
- electrically connected
- master controller
- slope
- square
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
Abstract
A kind of power source loads test device, for carrying out dynamic load test to a tested power supply, the power source loads test device includes the master controller, function generator and current detection circuit being successively electrically connected, and the function generator is for exporting a square-wave signal；Described draw carries the output electric current that circuit is used to dynamically change the tested power supply according to the square-wave signal；The current detection circuit is also electrically connected to the master controller, the slope that the current detection circuit is used to that the master controller to be cooperated to detect the output electric current, the slope for the output electric current that the master controller is used to will test is compared with a default slope value, and accordingly control the function generator according to comparison result and adjust the square-wave signal, until the slope of the output electric current is equal with the default slope value.
Description
Technical field
The present invention relates to a kind of power source loads test device more particularly to a kind of power source loads tests for computer VRM
Device.
Background technique
The voltage regulator module (Voltage Regulator Module, VRM) of computer in actual use, institute's band
Load is usually dynamic load, that is, the load of VRM changes at any time, and correspondingly, the output electric current of VRM is also with the change of load
Change and is in dynamic change.For example, computer is when entering certain games, the load of VRM institute band can be significantly increased, correspondingly
The output electric current of VRM also significantly increases.
When carrying out dynamic test to VRM, an electronic load, the electronic load generally are connected in the output end of VRM
It is realized by the output electric current that simulation actual use situation changes VRM and the dynamic load of VRM is tested.VRM carries out dynamic test
When, under the action of electronic load, the waveform for exporting electric current can generally be reduced to square-wave waveform shown in FIG. 1, the output of VRM
The rise time that electric current rises to I1 from 0 is t1, wherein exports the slope of electric current, i.e. the drawing load slope of electronic load is：I1 with
The ratio of rise time t1.According to the difference of load, the drawing load slope of VRM is also different, and sometimes, it is oblique that VRM needs biggish drawing to carry
Rate loads to drive.
The drawing of current electronic load carries slope generally in 1A/ μ s or so, and be it is fixed, be unable to satisfy certain VRM
To the larger demand for drawing load slope.
Summary of the invention
In view of the above-mentioned problems, can provide the larger power source loads test device for drawing load slope it is necessary to provide a kind of.
A kind of power source loads test device is used to carry out dynamic load test to a tested power supply, including successively electrically connects
Master controller, function generator, drawing load circuit and the current detection circuit connect, the function generator is for exporting a square wave
Signal；Described draw carries the output electric current that circuit is used to dynamically change the tested power supply according to the square-wave signal, including electricity
Press follower, the first Metal Oxide Semiconductor Field Effect Transistor, load resistance and the first current-limiting resistance, the voltage follow
The non-inverting input terminal of device is electrically connected to the output end of the function generator, for receiving the square-wave signal, the voltage
The output end of follower is electrically connected to the grid of first Metal Oxide Semiconductor Field Effect Transistor, first gold medal
The drain electrode for belonging to oxide semiconductor field effect transistor is electrically connected to the output end of the tested power supply, first metal oxygen
The source electrode of compound semiconductor field effect transistor is grounded by the load resistance, and first MOS field
Node between the source electrode of effect transistor and the load resistance is electrically connected to the inverting input terminal of the voltage follower；
First current-limiting resistance is electrically connected to the inverting input terminal of the voltage follower and first metal oxide is partly led
Between node between the source electrode of body field effect transistor and the load resistance, for preventing the reverse phase of the voltage follower
Electric current on input terminal impacts the test of the output electric current；The current detection circuit is also electrically connected to the master
Controller, the slope that the current detection circuit is used to that the master controller to be cooperated to detect the output electric current, the main control
The slope for the output electric current that device is used to will test is compared with a default slope value, and is accordingly controlled according to comparison result
It makes the function generator and adjusts the square-wave signal, until the slope of the output electric current is equal with the default slope value.
In the present invention power source loads test device by main controller controls function generator to the waveform of square-wave signal into
Row is adjusted, so as to carry slope by the drawing for drawing load circuit accordingly to adjust the power source loads test device, so as to as needed
It obtains biggish drawing and carries slope.In addition, according to the different default slope values that keyboard circuit inputs, the power source loads test dress
Setting, which can also accordingly obtain different drawings, carries slope, therefore, has preferable versatility.
Detailed description of the invention
Fig. 1 is output current wave figure of the existing VRM when carrying out dynamic and testing.
Fig. 2 is the functional block diagram of the power source loads test device of better embodiment of the present invention.
Fig. 3 is the circuit diagram of power source loads test device shown in Fig. 2.
Main element symbol description
Power source loads test device 100
VRM 200
Master controller 10
Function generator 20
It draws and carries circuit 30
Current detection circuit 40
Enabled circuit 50
Keyboard circuit 60
Display 70
Export electric current Io
Current detecting pin P1
Control pin P2
Voltage follower U1
Operational amplifier U2
First MOSFET Q1
NPN type triode Q2
PNP type triode Q3
2nd MOSFET Q4
Load resistance R0
Filter resistance R1
Current-limiting resistance R2-R8, R10
Feedback resistance R9
Filter capacitor C1
Non-inverting input terminal 1,5
Inverting input terminal 2,6
Output end 3,7
Control terminal 4,8
Grid g1, g2
Source electrode s1, s2
Drain d1, d2
Base stage b1, b2
Collector c1, c2
Emitter e 1, e2
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
Referring to Fig. 2, the power source loads test device 100 of better embodiment of the present invention is used to carry out a tested power supply
Dynamic load test.In the present embodiment, the present invention will be described so that the tested power supply is a VRM200 as an example.
Power source loads test device 100 includes master controller 10, function generator 20, draws load circuit 30, current detecting electricity
Road 40, enabled circuit 50, keyboard circuit 60 and display 70.Function generator 20 is for generating a square-wave signal；It draws and carries electricity
Road 30 is used to dynamically change the output electric current of VRM200 according to the square-wave signal；Current detection circuit 40 is for cooperating master control
Device 10 processed detects the output electric current Io of VRM200, i.e. load current, to obtain the slope of output electric current Io；The master controller
10 for the slope for exporting electric current Io to be compared with a default slope value, and is occurred according to the corresponding control function of comparison result
Device 20 adjusts the waveform of the square-wave signal, until the slope of output electric current Io is equal with the default slope value.
Also referring to Fig. 3, master controller 10 includes the current detecting pin P1 for being electrically connected to current detection circuit 40
And it is electrically connected the control pin P2 of enabled circuit 50.
Drawing and carrying circuit 30 includes voltage follower U1, the first Metal Oxide Semiconductor Field Effect Transistor (Metal-
Oxide-Semiconductor Field-Effect Transistor, MOSFET) Q 1, load resistance R0, filter resistance R1,
Current-limiting resistance R2-R5 and filter capacitor C1.Voltage follower U1 include non-inverting input terminal 1, inverting input terminal 2, output end 3 with
And control terminal 4.The non-inverting input terminal 1 of voltage follower U1 is electrically connected to function generator 20 by current-limiting resistance R2, is used for
Receive the square-wave signal；Inverting input terminal 2 passes sequentially through filter resistance R1 and filter capacitor C1 is electrically connected to output end 3；
Output end 3 is electrically connected to the grid g1 of the first MOSFET Q1 by current-limiting resistance R3；Control terminal 4 is electrically connected to enabled electricity
Road 50.The source electrode s1 of first MOSFET Q1 is grounded by load resistance R0, and source electrode s1 is also electrically connected to voltage follower U1's
Inverting input terminal 2；The drain electrode d1 of first MOSFET Q1 is electrically connected to the output end of VRM200.In the present embodiment, source electrode
S1 is electrically connected the inverting input terminal 2 of voltage follower U1 by current-limiting resistance R5.Current-limiting resistance R5 is for preventing voltage follow
Electric current in the inverting input terminal 2 of device U1 impacts the test of the output electric current Io of VRM.
The arc in phase on voltage and its non-inverting input terminal 1 on the output end 3 of voltage follower U1, and voltage follower
The amplification factor of U1 is approximately 1, and therefore, the signal that the output end 3 of voltage follower U1 exports is the square-wave signal, described
Square-wave signal drives the first MOSFET Q1 to sequentially turn on and end, so that VRM200 generates one dynamically on load resistance R0
Electric current, i.e. the output electric current Io of VRM200.
According to the resolution of operational amplifier, the electric current of the inverting input terminal 2 of voltage follower U1 is approximately zero, because
This, the pressure drop very little on current-limiting resistance R5, the current potential on the source electrode s1 of the first MOSFET Q1 is approximately equal to voltage follower U1's
The current potential of inverting input terminal 2.According to the short characteristic of void of operational amplifier, the current potential of the non-inverting input terminal 1 of voltage follower U1 with
The current potential of inverting input terminal 2 is equal, and therefore, the amplitude of the current potential on the source electrode s1 of the first MOSFET Q1 is believed equal to the square wave
Number amplitude.And the electric current on load resistance R0, the i.e. value of output electric current Io are equal to current potential and load resistance R0 on source electrode s1
Resistance value quotient, in this way, by the amplitude for changing the square-wave signal, i.e., the size of changeable output electric current Io, thus, in phase
In the case where the same rise time, output electric current Io is bigger, then its slope is bigger.Further, since the amplitude of the square-wave signal
When change, the amplitude of output electric current Io is also changed correspondingly, and therefore, output electric current Io has rising identical with the square-wave signal
Time, fall time, frequency and duty ratio can also by changing the rise time and fall time of the square-wave signal
The corresponding rise time and fall time for changing output electric current Io, in the case where output electric current Io amplitude is constant, the rise time
And fall time is bigger, then its slope is smaller.
In the present embodiment, drawing and carrying circuit 30 further includes NPN type triode Q2 and PNP type triode Q3.NPN type three
Pole pipe Q2 and PNP type triode Q3 is avoided described for enhancing the square-wave signal to the driving capability of the first MOSFET Q1
Square-wave signal distortion can not the first MOSFET Q1 of normal driving.Specifically, the output end 3 of voltage follower U1 passes through current limliting electricity
Resistance R5 is electrically connected to base stage b1, b2 of NPN type triode Q2 and PNP type triode Q3.The collector c1 of NPN type triode Q2
It is electrically connected to+5V power supply；Emitter e 1 is electrically connected to the emitter e 2 of PNP type triode Q3, and between emitter e 1, e2
Node the grid g1 of the first MOSFET Q1 is electrically connected to by current-limiting resistance R3.The collector c2 electricity of PNP type triode Q3
Property is connected to -5V power supply.In addition, PNP type triode Q3 is also used to make the first MOSFET Q1 when the first MOSFET Q1 cut-off
Interior charging capacitor (not shown) is grounded rapidly electric discharge, to make the first MOSFET Q1 quickly end, to improve first
The response speed of MOSFET Q1.
Current detection circuit 40 includes operational amplifier U2, current-limiting resistance R6-R8 and feedback resistance R9.Operational amplifier
U2 includes non-inverting input terminal 5, inverting input terminal 6, output end 7 and control terminal 8.The non-inverting input terminal 5 of operational amplifier U2 is logical
Cross the node that current-limiting resistance R6 is electrically connected between load resistance R0 and source electrode s1；And non-inverting input terminal 5 and current-limiting resistance R6
Between node also pass through current-limiting resistance R8 and be grounded.Inverting input terminal 6 is electrically connected to load resistance R0 by current-limiting resistance R7
Node between ground；And the node between inverting input terminal 6 and current-limiting resistance R7 also passes through feedback resistance R9 and is electrically connected to
Output end 7.Output end 7 is electrically connected to master controller 10.Described in operational amplifier U2 is used to flow through on load resistance R0
Voltage signal is converted into after output electric current Io amplification to export to the current detecting pin P1 of master controller 10,10 basis of master controller
The voltage signal accordingly calculates output electric current Io, to judge to export according to the variation for exporting electric current Io on load resistance R0
The slope of electric current Io.
Enabled circuit 50 is electrically connected to master controller 10, and master controller 10 is drawn by the enabled control of circuit 50 and carries circuit 30
And the working condition of current detection circuit 40.Specifically, enabling circuit 50 includes the 2nd MOSFET Q4 and current-limiting resistance
R10.The grid g2 of 2nd MOSFET Q4 is electrically connected to the control pin P2 of master controller 10, source electrode s2 ground connection, grid d2 electricity
Property is connected to the control terminal 4,8 of voltage follower U1 and operational amplifier U2.The control of voltage follower U1 and operational amplifier U2
Node between end 4,8 processed and drain electrode d2 also passes through current-limiting resistance R10 and is electrically connected to a power supply, as in present embodiment+
5V power supply.Conducting and cut-off of the master controller 10 by the 2nd MOSFET Q4 of control, the corresponding level shape for changing control terminal 4 and 8
State starts to work or stops working to control voltage follower U1 and operational amplifier U2.In the present embodiment, control terminal
4 and 8 be that high level is effective.In this way, when master controller 10 sends a low level signal (logical zero) to the by control pin P2
When two MOSFET Q4, the 2nd MOSFET Q4 cut-off, control terminal 4 and 8 is connected to+5V power supply in height by current-limiting resistance R10
Level, voltage follower U1 and operational amplifier U2 start to work；And when master controller 10 is high by control pin P2 transmission one
When level signal (logic 1) is to the 2nd MOSFET Q4, the 2nd MOSFET Q4 conducting, control terminal 4 and 8 passes through the 2nd MOSFET
Q4 is grounded and is in low level, and voltage follower U1 and operational amplifier U2 stop working.
It is appreciated that the enabled circuit 50 can also be only connected to voltage follower U1 or operational amplifier U2 wherein
One, so that master controller 10 only controls the working condition of one of them of voltage follower U1 or operational amplifier U2
System.
In the present embodiment, the default slope value is inputted by the keyboard circuit 60 for being electrically connected to master controller 10.
Different default slope values is inputted by keyboard circuit 60, can make that load circuit 30 is drawn to obtain different drawing load slopes.In addition,
The parameters such as amplitude, rise time, fall time, frequency and the duty ratio of the square-wave signal that function generator 20 exports
It can be inputted by the keyboard circuit 60, master controller 10 receives each parameter of the square-wave signal by keyboard circuit 60, and
The corresponding square-wave signal is exported according to each state modulator function generator 20.
Display 70 is electrically connected to the master controller 10, for showing keyboard circuit under the control of master controller 10
The default slope value of 60 inputs and each parameter of the square-wave signal.
The course of work of power source loads test device 100 described in brief description：
The drain electrode d1 for drawing the first MOSFET Q1 for carrying circuit 30 is electrically connected to a tested power supply first, such as originally
VRM200 to be measured in embodiment.Then keyboard circuit 60 inputs the width of the default slope value and the square-wave signal first
The parameters such as value, rise time, fall time, frequency and duty ratio.Master controller 10 controls display 70 and shows keyboard circuit
The above- mentioned information of 60 inputs, while the function generator 20 according to each state modulator of the square-wave signal of the input of keyboard circuit 60
The corresponding square-wave signal is exported, subsequent master controller 10 is drawn by the enabled control of circuit 50 and carries circuit 30 and current detecting
Circuit 40 is started to work, and is drawn and is carried circuit 30 then according to the square-wave signal driving corresponding output electric current Io of VRM200 output, electricity
Then cooperation master controller 10 detects the variation of the output electric current Io accordingly to judge the output electricity to current detection circuit 40
Flow the slope of Io.The slope for the output electric current Io that master controller 10 will test again is compared with the default slope value, and
The amplitude of the square-wave signal and/or rise time and fall time are carried out according to comparison result control function generator 20 micro-
It adjusts, until the slope of output electric current Io is equal with the default slope value.
At this point, power source loads test device 100 can be equivalent to a dynamic electronic load, in power source loads test device
Under the action of 100, so that the output electric current Io of VRM200 is in dynamic change, realizes and the dynamic of VRM200 is tested.
The power source loads test device 100 is by 10 control function generator 20 of master controller to the wave of square-wave signal
Shape is adjusted, so as to reach it by the drawing load slope for drawing load circuit 30 accordingly to adjust the power source loads test device 100
To the default slope value, biggish drawing load slope can be obtained so as to which the default slope value is set as needed.In addition,
According to the different default slope values that keyboard circuit 60 inputs, the power source loads test device 100 can also accordingly obtain difference
Drawing carry slope, therefore, have preferable versatility.
Claims (3)
1. a kind of power source loads test device, for carrying out dynamic load test to a tested power supply, it is characterised in that：The electricity
Source load testing device includes the master controller being successively electrically connected, function generator, draws load circuit and current detection circuit,
The function generator is for exporting a square-wave signal；The drawing carries circuit and is used to dynamically change institute according to the square-wave signal
State the output electric current of tested power supply, including voltage follower, the first Metal Oxide Semiconductor Field Effect Transistor, load resistance
And first current-limiting resistance, the non-inverting input terminal of the voltage follower are electrically connected to the output end of the function generator, use
In receiving the square-wave signal, the output end of the voltage follower is electrically connected to first MOS field
The grid of effect transistor, the drain electrode of first Metal Oxide Semiconductor Field Effect Transistor are electrically connected to described tested
The source electrode of the output end of power supply, first Metal Oxide Semiconductor Field Effect Transistor is grounded by the load resistance,
And the node between the source electrode and the load resistance of first Metal Oxide Semiconductor Field Effect Transistor is electrically connected
To the inverting input terminal of the voltage follower；The reverse phase that first current-limiting resistance is electrically connected to the voltage follower is defeated
Enter between end and the node between the source electrode and the load resistance of first Metal Oxide Semiconductor Field Effect Transistor,
The electric current in inverting input terminal for preventing the voltage follower impacts the test of the output electric current；The electricity
Current detection circuit is also electrically connected to the master controller, and the current detection circuit is for cooperating master controller detection institute
State the slope of output electric current, the slope of the output electric current that the master controller is used to will test and a default slope value into
Row compares, and accordingly controls the function generator according to comparison result and adjust the square-wave signal, until the output electric current
Slope it is equal with the default slope value.
2. power source loads test device as described in claim 1, it is characterised in that：The master controller is by controlling the letter
Number generator changes (i) amplitude, and/or (ii) rise time and the fall time of the square-wave signal to adjust the output
The slope of electric current.
3. power source loads test device as claimed in claim 2, it is characterised in that：It further includes filter resistance that the drawing, which carries circuit,
And filter capacitor, the inverting input terminal of the voltage follower passes sequentially through the filter resistance and filter capacitor electrically connects
It is connected to the output end of the voltage follower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610012435.7A CN105738835B (en) | 2012-06-21 | 2012-06-21 | Power source loads test device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610012435.7A CN105738835B (en) | 2012-06-21 | 2012-06-21 | Power source loads test device |
| CN201210206665.9A CN103513191B (en) | 2012-06-21 | 2012-06-21 | Power source loads proving installation |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210206665.9A Division CN103513191B (en) | 2012-06-21 | 2012-06-21 | Power source loads proving installation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105738835A CN105738835A (en) | 2016-07-06 |
| CN105738835B true CN105738835B (en) | 2018-11-16 |
Family
ID=56246179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610012435.7A Active CN105738835B (en) | 2012-06-21 | 2012-06-21 | Power source loads test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105738835B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410855A (en) * | 1995-01-11 | 2003-04-16 | 微行星有限公司 | Electric power controlling method and apparatus thereof |
| CN1788412A (en) * | 2002-12-16 | 2006-06-14 | 皇家飞利浦电子股份有限公司 | Self adaptable bias circuit for enabling dynamic control of quiescent current in a linear power amplifier |
| CN101789921A (en) * | 2009-01-23 | 2010-07-28 | 中芯国际集成电路制造(上海)有限公司 | Amplitude shift keying demodulator and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060132518A1 (en) * | 2004-05-27 | 2006-06-22 | Silverbrook Research Pty Ltd | Printhead module having interleaved shift registers |
-
2012
- 2012-06-21 CN CN201610012435.7A patent/CN105738835B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410855A (en) * | 1995-01-11 | 2003-04-16 | 微行星有限公司 | Electric power controlling method and apparatus thereof |
| CN1788412A (en) * | 2002-12-16 | 2006-06-14 | 皇家飞利浦电子股份有限公司 | Self adaptable bias circuit for enabling dynamic control of quiescent current in a linear power amplifier |
| CN101789921A (en) * | 2009-01-23 | 2010-07-28 | 中芯国际集成电路制造(上海)有限公司 | Amplitude shift keying demodulator and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105738835A (en) | 2016-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105717463B (en) | Power source loads test device | |
| US20140009178A1 (en) | Impedance measuring device | |
| CN108767810A (en) | A kind of current-limiting circuit and current-limiting apparatus | |
| CN104169691A (en) | Excitation circuit for electromagnetic flow meter and electromagnetic flow meter | |
| CN105699912B (en) | Power source loads test device | |
| CN107171555A (en) | A kind of mu balanced circuit applied to high tension voltage IC interior | |
| CN105699913B (en) | Power source loads test device | |
| CN105699911B (en) | Power source loads test device | |
| CN105738835B (en) | Power source loads test device | |
| CN103941794A (en) | Series connection type transistor voltage stabilizing circuit with differential amplification function | |
| CN104714176A (en) | Power source testing device reducing surge current and control method of power source testing device | |
| CN105119574B (en) | D class power amplifiers with POP noise suppresseds | |
| CN103728571A (en) | Power source detection circuit and method | |
| CN102570805A (en) | Buck converter | |
| CN103248225A (en) | Power conversion device, switching method of power conversion units and electronic equipment | |
| CN203504787U (en) | Electromagnetic heating circuit and electric pressure cooker | |
| CN206533522U (en) | Boom unit | |
| CN115494334A (en) | New forms of energy machine maintenance test equipment that charges | |
| CN214041597U (en) | Power-on and power-off test system | |
| CN100561843C (en) | Power circuit | |
| CN102841242B (en) | Sampling circuit and electronic equipment | |
| CN206226401U (en) | A kind of delay protection circuit | |
| CN110299840A (en) | Power circuit | |
| CN217957052U (en) | Drive control device | |
| CN203968453U (en) | Dimming control signal circuit for generating and LED-backlit light modulating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180925 Address after: 312500 Dong Chen 109, East West Village, Chengtan Town, Xinchang, Shaoxing, Zhejiang Applicant after: Zhejiang Haicheng De Chang Machinery Co., Ltd. Address before: 518000 Room 201, building A, 1 front Bay Road, Shenzhen Qianhai cooperation zone, Shenzhen, Guangdong Applicant before: Nine city network technology (Shenzhen) Co., Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191204 Address after: 239300 Chuzhou, Anhui, Tianchang, Xicheng District Patentee after: Anhui shangcable Instrument Group Co., Ltd Address before: 312500 Dongchen 109, Dongchen Village, Dongcheng Town, Chengtan Town, Xinchang County, Shaoxing City, Zhejiang Province Patentee before: Zhejiang Haicheng De Chang Machinery Co., Ltd. |
|
| TR01 | Transfer of patent right |