CN108107255A - Current sampling device - Google Patents
Current sampling device Download PDFInfo
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- CN108107255A CN108107255A CN201611044187.0A CN201611044187A CN108107255A CN 108107255 A CN108107255 A CN 108107255A CN 201611044187 A CN201611044187 A CN 201611044187A CN 108107255 A CN108107255 A CN 108107255A
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- pipe
- sampling
- driving switch
- switch pipe
- driving
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
Abstract
The invention discloses a kind of current sampling devices, the electric current of load is flowed through to line sampling, current sampling device includes the first driving switch unit, amplifier unit and line sampling unit, first driving switch unit, include the first driving switch pipe and the second driving switch pipe, the electric current of power supply output is followed by the first driving switch pipe when first switch pipe and second switch pipe turn on, load and the second driving switch pipe, amplifier unit includes positive input terminal, negative input end and output terminal, positive input terminal is coupled to load, amplifier unit flows through the electric current of load by positive input terminal reception when first driving switch pipe turns on, line sampling unit is electrically coupled to negative input end, output terminal and the second driving switch pipe, line sampling unit exports sample rate current after receiving the electric current for flowing through load of amplifier unit output.
Description
Technical field
The present invention relates to a kind of current sampling devices, specifically, are related to a kind of electric current for realizing electric current line sampling and adopt
Sampling device.
Background technology
Fig. 1 is refer to, Fig. 1 is one current sampling device structure diagram of the prior art.As shown in Figure 1, it is shown in Fig. 1
Analog current sample mode, power tube N3 are in saturation region, go control sampling pipe N3_1's using the gate source voltage of power tube N3
Electric current, because being in the metal-oxide-semiconductor of saturation region, the electric current of the metal-oxide-semiconductor of identical gate source voltage is related to breadth length ratio W/L, it is assumed that sampling
The breadth length ratio of pipe N3_1 is W/L, and power tube N3 is the parallel connection of n sampling pipe, so breadth length ratio is n*W/L, then sampling pipe N3_
1 electric current is exactly the 1/n of power tube N3；When the electric current of sampling pipe N3_1 is more than benchmark IREF1, comparator A output low levels,
Show that system enters over-current state.Actually the manner has ignored channel modulation effect, and the drain voltage of actual power pipe is with adopting
The drain voltage of sample pipe is different, and certain influence can be generated to the sampling precision of electric current；This mode also has a shortcoming to be exactly can not
Sampling operation is in the power tube of linear zone.
Fig. 2 is refer to, Fig. 2 is another current sampling device structure diagram of the prior art.As shown in Fig. 2, shown in Fig. 2
For resistance sampling mode, this sample mode is largely that power tube N4 is operated in digital switch state.Using high-power MOS tube,
The conduction impedance that exactly make use of its minimum, and its electric current is sampled, sampling resistor Rcs is placed on high power tube access, is bright
It is aobvious inappropriate, power tube N4 drain electrodes are added to the equivalent resistance on ground, so sampling resistor Rcs is placed on by resistance sampling mode
The source level of sampling pipe N4_1, using the voltage and power tube N4 of sampling resistor Rcs with the area of sampling pipe N4_1 than detection power
The output current of pipe N4, when the voltage of sampling resistor Rcs is more than VREF1 benchmark, comparator A output high level, show system into
Enter over-current state.
Above two mode is all there are the nonlinear problem of sample rate current, and uniformity is made poor, is only used for electricity
The not high occasion of sampling request is flowed, therefore is badly in need of developing a kind of current sampling device for overcoming drawbacks described above.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of current sampling device, wherein, the current sample dress
The electric current that load is flowed through to line sampling is put, the current sampling device includes：
First driving switch unit includes the first driving switch pipe and the second driving switch pipe, first driving switch
Electric property coupling, the first switch pipe and the second switch pipe are led successively for pipe, the load and the second driving switch pipe
The electric current of power supply output is followed by the first driving switch pipe, the load and the second driving switch pipe when logical：
Amplifier unit, comprising positive input terminal, negative input end and output terminal, the positive input terminal is coupled to the load, institute
The amplifier unit flows through the electric current of the load by the positive input terminal reception when stating the conducting of the first driving switch pipe；
Line sampling unit is electrically coupled to the negative input end, the output terminal and the second driving switch pipe, institute
It states after line sampling unit receives the electric current for flowing through the load of the amplifier unit output and exports sample rate current.
Above-mentioned current sampling device, wherein, the line sampling unit includes：
First sampling pipe, grid are electrically coupled to the output terminal, and the source electrode of first sampling pipe is electrically coupled to
The negative input end, the drain electrode of first sampling pipe export the sample rate current；And
Second sampling pipe, drain electrode are electrically coupled to the source electrode of first sampling pipe, the grid of second sampling pipe
It is electrically coupled to the grid of the second driving switch pipe, the source electrode ground connection of second sampling pipe.
Above-mentioned current sampling device, wherein, when the first driving switch pipe, the second driving switch pipe, described
When first sampling pipe and second sampling pipe turn on, the drain electrode level of second sampling pipe and the second driving switch pipe
Drain electrode level it is identical, the sample rate current is I=k × I2, and wherein k is the amplification factor of the amplifier unit, and I2 is flows through
The electric current of the second driving switch pipe.
Above-mentioned current sampling device, wherein, also comprising the first control unit and the second control unit, first control
Unit is electrically coupled to the grid of the first driving switch pipe, the first control unit output first control signal control institute
State the conducting of the first driving switch pipe, second control unit is electrically coupled to the grid of the second driving switch pipe and described
The grid of second sampling pipe, second control unit output second control signal control the second driving switch pipe and described
Second sampling pipe turns on.
Above-mentioned current sampling device, wherein, the source electrode of the first driving switch pipe is electrically coupled to the power supply, institute
The drain electrode for stating the first driving switch pipe is electrically coupled to the load, and the drain electrode of the second driving switch pipe is electrically coupled to institute
State load, the source electrode ground connection of the second driving switch pipe.
Above-mentioned current sampling device, wherein, also comprising the second driving switch unit, the second driving switch unit bag
Containing the 3rd driving switch pipe and the 4th driving switching tube, the 3rd driving switch pipe, the load and the 4th driving are opened
Pipe electric property coupling successively is closed, the electric current of power supply output is followed by institute when the 3rd switching tube and the 4th switching tube turn on
The 3rd driving switch pipe, the load and the 4th driving switching tube are stated, the line sampling unit is also comprising the 3rd sampling
Pipe, the grid of the 3rd sampling pipe are electrically coupled to the grid of the 4th driving switching tube, the source of the 3rd sampling pipe
Pole is grounded, and the drain electrode of the 3rd sampling pipe is electrically coupled to the source electrode of first sampling pipe.
Above-mentioned current sampling device, wherein, first control unit is also electrically coupled to the 4th driving switch
The grid of pipe, first control unit export the 4th control signal control the 4th driving switching tube and the 3rd sampling
Pipe turns on, and second control unit is electrically coupled to the grid of the 3rd driving switch pipe, and second control unit is defeated
Go out the 3rd control signal and control the 3rd driving switch pipe conducting.
Above-mentioned current sampling device, wherein, the source electrode of the 3rd driving switch pipe is electrically coupled to the power supply, institute
The drain electrode for stating the 3rd driving switch pipe is electrically coupled to the load and the drain electrode of the second driving switch pipe, the 4 wheel driven
The drain electrode of dynamic switching tube is electrically coupled to the load and the drain electrode of the first driving switch pipe, the 4th driving switching tube
Source electrode ground connection.
Above-mentioned current sampling device, wherein, also comprising switch unit, the switch unit includes first switch and second
Switch, the first switch are electrically coupled to the load, second control unit and the positive input terminal, and described second opens
Pass is electrically coupled to the load, first control unit and the positive input terminal, and the first switch receives described second
It is turned on after control signal, the second switch turns on after receiving the 4th control signal.
Above-mentioned current sampling device, wherein, when the first driving switch pipe, the second driving switch pipe, described
When first switch, first sampling pipe and second sampling pipe turn on, the drain electrode level of second sampling pipe with it is described
The drain electrode level of second driving switch pipe is identical, and the sample rate current is I=k × I2, and wherein k is the amplification of the amplifier unit
Multiple, I2 are the electric current for flowing through the second driving switch pipe；Or；When the 3rd driving switch pipe, the 4th driving are opened
When first sampling pipe described in Guan Guan, the second switch and the 3rd sampling pipe turn on, the drain electrode electricity of the 3rd sampling pipe
Flat identical with the drain electrode level of the described 4th driving switching tube, the sample rate current is I=k × I4, and wherein k is the amplifier list
The amplification factor of member, I4 are the electric current for flowing through the 4th driving switching tube.
Above-mentioned current sampling device, wherein, also comprising proportional sampling control unit, it is electrically coupled to first sampling
The sample rate current is converted into current source and exported by the drain electrode of pipe, the proportional sampling control unit.
Above-mentioned current sampling device, wherein, the first driving switch pipe, the second driving switch pipe, described
Three driving switch pipes, the 4th driving switching tube, first sampling pipe, second sampling pipe and the 3rd sampling pipe
For insulating gate type field effect tube Mosfet or insulating gate type bipolar transistor IGBT or bipolar junction transistor BJT.
The current sampling device of the present invention is directed to the prior art its effect and is, current sampling device application of the invention
In high-power bridge-type drive area, motor drive area cannot be only used for, it may also be used for D-type audio power amplifier driving neck
Domain.It realizes accurate current sample mode, not only can be applied to simulation working condition sampling, but also can be applied to digital switch state
Sample mode, avoid the channel modulation effect of analog sampling, also avoid the non-linear of digital sample, can be accurately real
The now accurate line sampling from low current to high current is also realized to protect the functions such as system or speed stabilizing.
Description of the drawings
Fig. 1 is one current sampling device structure diagram of the prior art；
Fig. 2 is another current sampling device structure diagram of the prior art；
Fig. 3 is current sampling device structure diagram of the present invention.
Specific embodiment
Hereby detailed content and technology for the present invention explanation is now described further with a preferred embodiment, but not
It should be interpreted the limitation that the present invention is implemented.
Fig. 3 is referred to, Fig. 3 is current sampling device structure diagram of the present invention.As shown in figure 3, current sampling device bag
It is single containing the first driving switch unit 11, the second driving switch unit 12, switch unit 13, the control of the first control unit 14, second
Member 15, amplifier unit 16, line sampling unit 17 and proportional sampling control unit 18.
First driving switch unit 11 includes the first driving switch pipe P1 and the second driving switch pipe N2, the first driving switch
The source electrode of pipe P1 is electrically coupled to power Vcc, and the drain electrode of the first driving switch pipe P1 is electrically coupled to load 19, and the second driving is opened
The drain electrode for closing pipe N2 is electrically coupled to load 19, the source electrode ground connection of the second driving switch pipe N2；Second driving switch unit 12 wraps
Containing the driving switching tube N4 of the 3rd driving switch pipe P3 and the 4th, the source electrode of the 3rd driving switch pipe P3 is electrically coupled to power Vcc,
The drain electrode of 3rd driving switch pipe P3 is electrically coupled to the drain electrode of 19 and second driving switch pipe N2 of load, the 4th driving switching tube
The drain electrode of N4 is electrically coupled to the drain electrode of 19 and first driving switch pipe P1 of load, the source electrode ground connection of the 4th driving switching tube N4.
First control unit 14 is electrically coupled to the grid of the drivings of the first driving switch pipe P1 and the 4th switching tube N4, and first
Control unit 14 exports first control signal and controls the first driving switch pipe P1 conductings or the 4th control signal of output control the 4th
Driving switch pipe N4 is turned on；Second control unit 15 is electrically coupled to the second driving switch pipe N2's and the 3rd driving switch pipe P3
Grid, the second control unit 15 output second control signal control the 3rd control signal of the second driving switch pipe N2 conductings or output
The 3rd driving switch pipe P3 is controlled to turn on.
Switch unit 13 includes first switch 131 and second switch 132, and an input terminal in11 of first switch 131 is electrical
Be coupled to load 19, the drain electrode of the 3rd driving switch pipe P3 and the drain electrode of the second driving switch pipe N2, first switch 131 it is another
Input terminal in12 is electrically coupled to the grid of the second control unit 15 and the second driving switch pipe N2, the output of first switch 131
End o11 is electrically coupled to the positive input terminal of amplifier unit 16；One input terminal in21 of second switch 132 is electrically coupled to load
19th, the drain electrode of the first driving switch pipe P1 and the drain electrode of the 4th driving switching tube N4, another input terminal in22 of second switch 132
It is electrically coupled to the grid of the first control unit 14 and the 4th driving switching tube N4, the electrical couplings of output terminal o21 of second switch 132
It is connected to the positive input terminal of amplifier unit 16；Wherein first switch 131 turns on after receiving second control signal, and second switch 132 connects
It is turned on after receiving the 4th control signal.
Line sampling unit 17 includes the first sampling pipe N11, the second sampling pipe N12 and the 3rd sampling pipe N13, the first sampling
The grid of pipe N11 is electrically coupled to the output terminal of amplifier unit 16, and the source electrode of the first sampling pipe N11 is electrically coupled to amplifier unit
16 negative input end, the drain electrode of the first sampling pipe N11 for line sampling unit 17 output terminal to export sample rate current I；Second
Sampling pipe N12, which drains, is electrically coupled to the source electrode of the first sampling pipe N11, and the grid of the second sampling pipe N12 is electrically coupled to second
The grid of driving switch pipe N2,132 and second control unit 15 of second switch, the source electrode ground connection of the second sampling pipe N12；3rd adopts
The grid of sample pipe N13 is electrically coupled to the 4th driving grid of switching tube, 131 and first control unit 14 of first switch, and the 3rd
The source electrode ground connection of sampling pipe N13, the drain electrode of the 3rd sampling pipe N13 is electrically coupled to the source electrode of the first sampling pipe N11, of the invention
When current sampling device works, the second sampling pipe N12 receives conducting or the 3rd sampling pipe N13 receptions the 4th after second control signal
It is turned on after control signal.
Proportional sampling control unit 18 is electrically coupled to the drain electrode of the first sampling pipe N11, and proportional sampling control unit 18 connects
It receives the sample rate current I of the drain electrode output of the first sampling pipe N11 and sample rate current I is converted into current source IREF outputs.
Wherein in the present embodiment, the first driving switch pipe, the second driving switch pipe, the 3rd driving switch pipe, 4 wheel driven
Dynamic switching tube, the first sampling pipe, the second sampling pipe and the 3rd sampling pipe are insulating gate type field effect tube Mosfet, but the present invention is simultaneously
It is not limited, in other embodiments the first driving switch pipe, the second driving switch pipe, the 3rd driving switch pipe, 4 wheel driven
Dynamic switching tube, the first sampling pipe, the second sampling pipe and the 3rd sampling pipe can also be insulating gate type bipolar transistor IGBT or double
Pole junction transistor BJT.
It refer to Fig. 3 again, the course of work that current sampling device of the present invention is illustrated with reference to Fig. 3 is as follows.
Operating mode (one)
First control unit 14 output first control signal controls the first driving switch pipe P1 conductings, and the second control unit is defeated
Enter second control signal and control the second driving switch pipe N2,131 and second sampling pipe N12 of first switch conducting, the first driving is opened
It closes pipe P1 and the second driving switch pipe N2 and forms one group of access, the electric current of power Vcc output is followed by the first driving switch pipe
P1,19 and second driving switch pipe N2 of load, the electric current that the second driving switch pipe N2 is flowed through by detection obtain flowing through load 19
Electric current, it is notable that the 3rd driving switch pipe P3, the 4th driving switching tube N4, second switch 132 and the 3rd are adopted at this time
Sample pipe N13 is off；First switch 131 is turned on is strobed into amplifier unit 16 by the drain electrode level of the second driving switch pipe N2
Positive input terminal, the second sampling pipe N12 conductings, and the grid potential of the second sampling pipe N12 is equal to the grid of the second driving switch pipe N2
Electrode potential；The source electrode of first sampling pipe N11 connects the drain electrode of the negative input end and the second sampling pipe N12 of amplifier unit 16, so transports
It puts unit 16, the second sampling pipe N12 and the first sampling pipe N11 and constitutes a closed loop negative feedback system, utilize close loop negative feedback
The characteristics of system, positive input terminal level are equal to negative input end level, show that the drain electrode level of the second sampling pipe N12 is opened equal to first
131 output level is closed, the output level of first switch 131 is equal to the incoming level of first switch 131, first switch 131
Incoming level is equal to the drain electrode level of the second driving switch pipe N2, so the drain electrode level of the second driving switch pipe N2 is equal to second
The drain electrode level of sampling pipe N12, if the drain electrode level of the second driving switch pipe N2 is V2, when the second driving switch pipe N2 is turned on
Equivalent resistance is R2, flows through the electric current of the second driving switch pipe N2 as I2, and resistance when the second sampling pipe N12 is turned on is R12, the
The sample rate current of one sampling pipe N11 outputs is I, has following relation：
V2=R2 × I2 (1)
I=V2/R12 (2)
R2=k × R12 (3)
Passing through formula (1), (2), (3), it can be deduced that I=k × I2, wherein k are the amplification factor of amplifier unit 16, so as to
Proportional sampling is realized, sample rate current I is transformed into current source IREF by proportional sampling control unit and exports.
Operating mode (two)
Second control unit 15 exports the 3rd control signal and controls the 3rd driving switch pipe P3 conductings, and the first control unit is defeated
Enter the 4th driving switching tube N4 of the 4th control signal control, 132 and the 3rd sampling pipe N13 of second switch conductings, the 3rd driving is opened
It closes the driving switching tubes of pipe P3 and the 4th N4 and forms one group of access, the electric current of power Vcc output is followed by the 3rd driving switch pipe
P3,19 and the 4th driving switching tube N4 of load, the electric current that the 4th driving switching tube N4 is flowed through by detection obtain flowing through load 19
Electric current, it is notable that the first driving switch pipe P1, the second driving switch pipe N2, first switch 131 and second are adopted at this time
Sample pipe N12 is off, and details are not described herein again for the process same section of the following course of work and operating mode (one), different
Part is that the sample rate current of the first sampling pipe N11 outputs is I, I=k × I4, and wherein I4 drives switching tube N4 to flow through the 4th
Electric current.
In conclusion the current sampling device of the present invention is applied to high-power bridge-type drive area, motor cannot be only used for
Drive area, it may also be used for D-type audio power amplifier drive area.It realizes accurate current sample mode, both can be applied to
Working condition sampling is simulated, and can be applied to the sample mode of digital switch state, avoids the channel modulation of analog sampling
Effect also avoids the non-linear of digital sample, can accurately realize the accurate line sampling from low current to high current, also
It realizes to protect the functions such as system or speed stabilizing.
Above are only presently preferred embodiments of the present invention, be not used for limiting the scope implemented of the present invention, without departing substantially from
In the case of of the invention spirit and its essence, those skilled in the art make in accordance with the present invention various to be changed accordingly
Become and deform, but these corresponding changes and deformation should all belong to the protection domain of appended claims of the invention.
Claims (12)
1. a kind of current sampling device, which is characterized in that the current sampling device flows through the electric current of load to line sampling,
The current sampling device includes：
First driving switch unit, comprising the first driving switch pipe and the second driving switch pipe, the first driving switch pipe, institute
State load and the second driving switch pipe electric property coupling successively, electricity when the first switch pipe and the second switch pipe turn on
The electric current of source output is followed by the first driving switch pipe, the load and the second driving switch pipe：
Amplifier unit, comprising positive input terminal, negative input end and output terminal, the positive input terminal is coupled to the load, and described
The amplifier unit flows through the electric current of the load by the positive input terminal reception when one driving switch pipe turns on；
Line sampling unit is electrically coupled to the negative input end, the output terminal and the second driving switch pipe, the line
Property sampling unit receive the electric current for flowing through the load of amplifier unit output after export sample rate current.
2. current sampling device as described in claim 1, which is characterized in that the line sampling unit includes：
First sampling pipe, grid are electrically coupled to the output terminal, and the source electrode of first sampling pipe is electrically coupled to described
Negative input end, the drain electrode of first sampling pipe export the sample rate current；And
Second sampling pipe, drain electrode are electrically coupled to the source electrode of first sampling pipe, and the grid of second sampling pipe is electrical
It is coupled to the grid of the second driving switch pipe, the source electrode ground connection of second sampling pipe.
3. current sampling device as claimed in claim 2, which is characterized in that when the first driving switch pipe, described second
When driving switch pipe, first sampling pipe and second sampling pipe turn on, the drain electrode level of second sampling pipe and institute
It is identical to state the drain electrode level of the second driving switch pipe, the sample rate current is I=k × I2, and wherein k is putting for the amplifier unit
Big multiple, I2 are the electric current for flowing through the second driving switch pipe.
4. current sampling device as claimed in claim 2, which is characterized in that also single comprising the first control unit and the second control
Member, first control unit are electrically coupled to the grid of the first driving switch pipe, the first control unit output the
One control signal controls the first driving switch pipe conducting, and second control unit is electrically coupled to second driving and opens
Close the grid of pipe and the grid of second sampling pipe, the second control unit output second control signal control described second
Driving switch pipe and second sampling pipe conducting.
5. current sampling device as described in claim 1, which is characterized in that the electrical coupling of source electrode of the first driving switch pipe
The power supply is connected to, the drain electrode of the first driving switch pipe is electrically coupled to the load, the second driving switch pipe
Drain electrode is electrically coupled to the load, the source electrode ground connection of the second driving switch pipe.
6. current sampling device as claimed in claim 4, which is characterized in that also comprising the second driving switch unit, described
Two driving switch units include the 3rd driving switch pipe and the 4th driving switching tube, the 3rd driving switch pipe, the load
And the 4th driving switching tube electric property coupling successively, power supply exports when the 3rd switching tube and the 4th switching tube turn on
Electric current followed by the 3rd driving switch pipe, it is described load and it is described 4th driving switching tube, the line sampling list
For member also comprising the 3rd sampling pipe, the grid of the 3rd sampling pipe is electrically coupled to the grid of the 4th driving switching tube, institute
The source electrode ground connection of the 3rd sampling pipe is stated, the drain electrode of the 3rd sampling pipe is electrically coupled to the source electrode of first sampling pipe.
7. current sampling device as claimed in claim 6, which is characterized in that first control unit is also electrically coupled to institute
The grid of the 4th driving switching tube is stated, first control unit exports the 4th control signal control the 4th driving switching tube
And the 3rd sampling pipe conducting, second control unit is electrically coupled to the grid of the 3rd driving switch pipe, described
Second control unit exports the 3rd control signal and controls the 3rd driving switch pipe conducting.
8. current sampling device as claimed in claim 7, which is characterized in that the electrical coupling of source electrode of the 3rd driving switch pipe
It is connected to the power supply, the drain electrode of the 3rd driving switch pipe is electrically coupled to the load and the second driving switch pipe
Drain electrode, the drain electrode of the 4th driving switching tube are electrically coupled to the load and the drain electrode of the first driving switch pipe, institute
State the source electrode ground connection of the 4th driving switching tube.
9. current sampling device as claimed in claim 7, which is characterized in that also comprising switch unit, the switch unit bag
Containing first switch and second switch, the first switch be electrically coupled to it is described load, second control unit and it is described just
Input terminal, the second switch are electrically coupled to the load, first control unit and the positive input terminal, and described first
Switch turns on after receiving the second control signal, and the second switch turns on after receiving the 4th control signal.
10. current sampling device as claimed in claim 9, which is characterized in that when the first driving switch pipe, described second
When driving switch pipe, the first switch, first sampling pipe and second sampling pipe turn on, second sampling pipe
The level that drains is identical with the drain electrode level of the second driving switch pipe, and the sample rate current is I=k × I2, and wherein k is described
The amplification factor of amplifier unit, I2 are the electric current for flowing through the second driving switch pipe；Or；When the 3rd driving switch pipe,
When the first sampling pipe and the 3rd sampling pipe turn on described in the 4th driving switching tube, the second switch, the described 3rd
The drain electrode level of sampling pipe is identical with the drain electrode level of the described 4th driving switching tube, and the sample rate current is I=k × I4,
Middle k is the amplification factor of the amplifier unit, and I4 is the electric current for flowing through the 4th driving switching tube.
11. current sampling device as claimed in claim 2, which is characterized in that also comprising proportional sampling control unit, electrical coupling
The drain electrode of first sampling pipe is connected to, the sample rate current is converted into current source and exported by the proportional sampling control unit.
12. current sampling device as claimed in claim 10, which is characterized in that the first driving switch pipe, described second
Driving switch pipe, the 3rd driving switch pipe, the 4th driving switching tube, first sampling pipe, second sampling
Pipe and the 3rd sampling pipe are insulating gate type field effect tube Mosfet or insulating gate type bipolar transistor IGBT or bipolar
Junction transistor BJT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611044187.0A CN108107255A (en) | 2016-11-24 | 2016-11-24 | Current sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611044187.0A CN108107255A (en) | 2016-11-24 | 2016-11-24 | Current sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108107255A true CN108107255A (en) | 2018-06-01 |
Family
ID=62204708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611044187.0A Withdrawn CN108107255A (en) | 2016-11-24 | 2016-11-24 | Current sampling device |
Country Status (1)
| Country | Link |
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| CN (1) | CN108107255A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113252949A (en) * | 2021-05-13 | 2021-08-13 | 北京芯格诺微电子有限公司 | High-precision current sampling circuit with on-chip real-time calibration |
-
2016
- 2016-11-24 CN CN201611044187.0A patent/CN108107255A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113252949A (en) * | 2021-05-13 | 2021-08-13 | 北京芯格诺微电子有限公司 | High-precision current sampling circuit with on-chip real-time calibration |
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Address after: No. 5, Xijin Road, Xinwu District, Wuxi City, Jiangsu Province, 214000 Applicant after: Wuxi Jingyuan Microelectronics Co.,Ltd. Address before: Room 209, building a, block 106-c, national high tech Industrial Development Zone, Wuxi City, Jiangsu Province, 214028 Applicant before: Wuxi Jingyuan Microelectronics Co.,Ltd. |
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| CB02 | Change of applicant information | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180601 |
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| WW01 | Invention patent application withdrawn after publication |