CN105843315A - Constant current source control method and constant current source circuit - Google Patents
Constant current source control method and constant current source circuit Download PDFInfo
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- CN105843315A CN105843315A CN201610310670.2A CN201610310670A CN105843315A CN 105843315 A CN105843315 A CN 105843315A CN 201610310670 A CN201610310670 A CN 201610310670A CN 105843315 A CN105843315 A CN 105843315A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
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Abstract
The invention provides a constant current source control method and a constant current source circuit. The constant current source circuit comprises a voltage source, a reference power supply unit, a load unit, a sampling unit, a comparison and feedback unit, a switching unit and a voltage maintaining unit. The voltage source is used for outputting constant currents. The reference power supply unit is used for providing preset reference voltages. The voltage source changes load voltages, and therefore load currents are controlled. The sampling unit is used for sampling the currents of the load unit to acquire sampled voltages. The comparison and feedback unit is used for acquiring the voltage error between the sampled voltages and the reference voltages and feeding back the voltage error to the voltage source so that the voltage source can adjust the output currents according to received feedback voltages to guarantee the constant output currents. The switching unit is used for controlling connection and disconnection between the voltage source and the load unit. The voltage maintaining unit is used for keeping feeding back voltages to the voltage source continuously when the voltage source and the load unit are disconnected. According to the constant current source control method and the constant current source circuit, a constant current source can achieve current connection and disconnection within the time of hundreds of nanoseconds to several microseconds.
Description
Technical field
The present invention relates to electronic circuit technology field, control technical field particularly to constant-current source, be specially a kind of constant-current source and control
Method and a kind of constant-current source circuit.
Background technology
Constant-current source is a widely used assembly in circuit, and constant-current source is the current source of output constant current hold, and preferable
Constant-current source should have the following characteristics that and not change because of load (output voltage) change；Do not change because of variation of ambient temperature；
Internal resistance is infinitely great (so that its electric current can all flow out to outside).The essence of constant-current source is to utilize device to carry out electric current instead
Feedback, dynamically regulates the power supply state of equipment, so that electric current tends to constant.As long as electric current can be obtained, it is possible to effectively shape
Become feedback, thus set up constant-current source.But in big electric current is applied, often there is higher the asking of dedicated current source chip price
Topic.A kind of method feasible in engineering is to use cheap voltage source chip, utilizes sampling resistor pressure drop to feed back, it is achieved permanent
The function in stream source.But its essence is still that the voltage loaded by change, make to be changed by the electric current of load.When needing
During electric current to be closed, voltage need to be dropped to the degree not having electric current in load by voltage source.When needs provide electric current again, then need
Voltage is added to original voltage.It is to say, the bigger problem that this circuit exists is that voltage chips is in order to reach mesh
Mark electric current, generally requires certain Voltage Establishment time.During this period of time typically between hundreds of microseconds are to several milliseconds.Some are needed
For the application of electric current to be switched fast, this time is unacceptable.
Summary of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of constant-current source control method and a kind of perseverance
Current source circuit, is used for solving to use voltage source chip to open and close slow-footed problem when doing constant-current source in prior art.
For achieving the above object and other relevant purposes, the present invention provides a kind of constant-current source circuit, and described constant-current source circuit includes:
Voltage source, is used for exporting constant current；Reference power supply unit, is used for providing default reference voltage；Load unit, by described
Voltage source changes load voltage thus controls load current；Sampling unit, is connected with described load unit, for described load
The electric current of unit carries out sampling and obtains sampled voltage；Relatively feedback unit, respectively with described reference power supply unit and described sampling list
Unit is connected, for described sampled voltage and described reference voltage are compared the described sampled voltage of acquisition and described reference voltage it
Between voltage error and described voltage error is fed back to described voltage source, so that described voltage source is according to the feedback voltage received
Regulation output electric current is to ensure described constant output current；Switch element, is arranged between described voltage source and described load unit,
For controlling the break-make between described voltage source and described load unit；Voltage holding unit, is arranged at described voltage source with described
Relatively between feedback unit, anti-to described voltage source for the maintenance when described voltage source and described load unit separated
Feedthrough voltage.
In one embodiment of the invention, described switch element includes metal-oxide-semiconductor or audion.
In one embodiment of the invention, described voltage holding unit includes: multiplexer, the first of described multiplexer
Input is connected with the described feedback unit that compares, and the outfan of described multiplexer is connected with described voltage source；Analog-digital converter,
Be connected to the first input end of described multiplexer with on the described circuit compared between feedback unit for described voltage source with
Described feedback voltage is gathered during conducting between described load unit；Digital to analog converter, with the second input of described multiplexer
Connect and be connected with described analog-digital converter for when described voltage source and described load unit separated, continue by described instead
Feedthrough voltage feeds back to the outfan of described multiplexer.
In one embodiment of the invention, described voltage holding unit includes: analog switch, the first input of described analog switch
End is connected with the described feedback unit that compares, the second output head grounding of described analog switch；Storage capacitor, one end and described simulation
The outfan of switch is connected, other end ground connection, for charging during conducting between described voltage source and described load unit, described
Continue to provide described voltage to described voltage source during voltage source and described load unit separated；Operational amplifier, positive inputs
End is connected with the outfan of described storage capacitor and described analog switch, and outfan is connected with described voltage source, for by described storage
The voltage that energy electric capacity provides is amplified mating with described feedback voltage.
In one embodiment of the invention, the inverting input of described operational amplifier is used for preventing shake through one after being connected with outfan
Ground connection after the resistance connection swung.
In one embodiment of the invention, described constant-current source circuit also includes: is connected to described sampling unit and described compares feedback
After the sampled voltage of described sampling unit is amplified, the described amplifying unit comparing feedback unit is fed back between unit.
For achieving the above object, the present invention also provides for a kind of constant-current source control method, and described constant-current source control method includes: utilize
Break-make between voltage source and the load under extraneous control signal of on-off control output constant current；In described voltage source and institute
When stating regulating load separated, the output voltage keeping described voltage source is constant.
In one embodiment of the invention, the voltage source utilizing metal-oxide-semiconductor or audion to control output constant current is controlled with in the external world
The break-make between load under signal processed.
In one embodiment of the invention, when described voltage source and described regulating load separated, keep described voltage source
Output voltage is constant to be specifically included: when turning between described voltage source and described regulating load, voltage source described in Gather and input is anti-
Feedthrough voltage, when described voltage source and described regulating load separated, continues described feedback voltage is fed back to described voltage
Source.
In one embodiment of the invention, when described voltage source and described regulating load separated, keep described voltage source
Output voltage is constant to be specifically included: storage electric energy during conducting between described voltage source and described regulating load, at described voltage source
During with described regulating load separated, continue to provide voltage constant with the output voltage keeping described voltage source to described voltage source.
As it has been described above, a kind of constant-current source control method of the present invention and a kind of constant-current source circuit, have the advantages that
1, the present invention utilizes the break-make between switch control voltage source and regulating load, and between described voltage source and regulating load
During disconnection, maintenance is to described voltage source feedback voltage, makes voltage source chip output voltage keep not when electric current is switched on and off cut-out
Become, when switch is again turned on, eliminate the Voltage Establishment time, constant-current source can be allowed real within the time of hundreds of nanosecond to several microseconds
Existing current switching, efficiently solves and uses voltage source chip to open and close slow-footed problem when doing constant-current source in prior art.
2, present configuration is simple, controls flexibly, economical and practical, has wide applicability.
Accompanying drawing explanation
Fig. 1 is shown as the schematic flow sheet of the constant-current source control method of the present invention.
Fig. 2 is shown as the theory diagram of a kind of constant-current source circuit of the present invention.
Fig. 3 is shown as the structural representation of a kind of constant-current source circuit of the present invention.
Fig. 4 is shown as a kind of preferred structure schematic diagram of voltage holding unit in a kind of constant-current source circuit of the present invention.
Fig. 5 is shown as the another kind of preferred structure schematic diagram of voltage holding unit in a kind of constant-current source circuit of the present invention.
Element numbers explanation
1 constant-current source circuit
11 voltage sources
12 reference power supply unit
13 load units
14 sampling units
15 compare feedback unit
16 switch elements
17 voltage holding units
S1～S2 step
Detailed description of the invention
Below by way of specific instantiation, embodiments of the present invention being described, those skilled in the art can be by disclosed by this specification
Content understand other advantages and effect of the present invention easily.The present invention can also be added by the most different detailed description of the invention
To implement or application, the every details in this specification can also be based on different viewpoints and application, in the essence without departing from the present invention
Various modification or change is carried out under god.
In a kind of constant-current source control method in the present embodiment and a kind of constant-current source circuit, by voltage source as constant-current source, wherein
Voltage source chip output voltage is obtained through error comparator by by voltage on sampling resistor and setting voltage.By this method,
Voltage source can be treated as constant-current source and use.But its essence is still that the voltage loaded by change, make by load
Electric current is changed.When employing voltage source of the prior art is as constant-current source, when electric current closed by needs, voltage source need to be by electricity
Pressure drop does not has the degree of electric current to loading.When needs provide electric current again, then need to add to voltage original voltage.
The purpose of the present embodiment is to provide a kind of constant-current source control method and a kind of constant-current source circuit, is used for solving prior art
Middle use voltage source chip opens and closes slow-footed problem when doing constant-current source.A kind of perseverance of the present embodiment described in detail below
Flow operated control method and the principle of a kind of constant-current source circuit and embodiment, make those skilled in the art need not creative work
I.e. it is appreciated that a kind of constant-current source control method of the present embodiment and a kind of constant-current source circuit.
Specifically, as it is shown in figure 1, the present embodiment provides a kind of constant-current source control method, described constant-current source control method include with
Lower step.
Step S1, utilizes leading between voltage source and the load under extraneous control signal of on-off control output constant current
Disconnected；
Step S2, when described voltage source and described regulating load separated, keeps the output voltage of described voltage source not
Become.
Hereinafter step S1 and S2 are described in detail.
Step S1, utilizes the break-make between voltage source and the load under extraneous control signal of on-off control output constant current.
Specifically, in the present embodiment, the voltage source utilizing metal-oxide-semiconductor or audion to control output constant current is controlled with in the external world
The break-make between load under signal processed.Owing to metal-oxide-semiconductor or triode switch are very rapid, so constant-current source can be allowed hundreds of
Current switching is realized in nanosecond to the time of several microseconds.
Step S2, when described voltage source and described regulating load separated, the output voltage keeping described voltage source is constant.
Specifically, in the present embodiment, when described voltage source and described regulating load separated, keep described voltage source
Output voltage is constant to be specifically included: when turning between described voltage source and described regulating load, voltage source described in Gather and input is anti-
Feedthrough voltage, when described voltage source and described regulating load separated, continues described feedback voltage is fed back to described voltage
Source.
Specifically, in the present embodiment, when described voltage source and described regulating load separated, keep described voltage source
Output voltage is constant to be specifically included: storage electric energy during conducting between described voltage source and described regulating load, at described voltage source
During with described regulating load separated, continue to provide voltage constant with the output voltage keeping described voltage source to described voltage source.
By both the above mode, voltage at described voltage source can be kept constant when electric current is switched on and off cut-out, make voltage source core
Sheet output voltage keeps constant.When switch is again turned on, eliminate the Voltage Establishment time, make current rise time in several microseconds
Within.
For realizing above-mentioned constant-current source control method, the present embodiment correspondence provides a kind of constant-current source circuit, specifically, such as Fig. 2 institute
Showing, described constant-current source circuit 1 includes: voltage source 11, reference power supply unit 12, load unit 13, sampling unit 14, than
Relatively feedback unit 15, switch element 16 and voltage holding unit 17.
A kind of physical circuit figure of described constant-current source circuit 1 is as shown in Figure 3.
In the present embodiment, described voltage source 11 is used for exporting constant current, voltage source chip U1 of described voltage source 11 defeated
Go out the feedback voltage V that voltage is obtained by feedbackfbControl.
In the present embodiment, described reference power supply unit 12 is used for providing default reference voltage, and described load unit 13 is by institute
State voltage source change load voltage thus control load current.By the voltage changed in load unit 13 in load, make by negative
Electric current in load is changed, thus matches with the change of external loading.As it is shown on figure 3, described load unit 13 can
Realized by regulation resistance R.
In the present embodiment, described sampling unit 14 is connected with described load unit 13, for the electricity to described load unit 13
Stream carries out sampling and obtains sampled voltage.Specifically, as it is shown on figure 3, in the present embodiment, described sampling unit 14 is by sampling electricity
Resistance Rs is constituted, and the electric current that sampling resistor Rs exchanges on economize on electricity resistance R is sampled, and obtains sampled voltage.
In the present embodiment, described constant-current source circuit 1 also includes: is connected to described sampling unit 14 and described compares feedback unit
After the sampled voltage of described sampling unit 14 is amplified, the described amplification list comparing feedback unit 15 is fed back between 15
Unit.The sampled voltage amplified device A1 that sampling is obtained by described sampling unit 14 feeds back to compare in feedback unit 15 after amplifying.
In the present embodiment, described compare feedback unit 15 respectively with described reference power supply unit 12 and described sampling unit 14 phase
Even, for described sampled voltage and described reference voltage being compared between the described sampled voltage of acquisition and described reference voltage
Described voltage error is also fed back to described voltage source 11 by voltage error, so that described voltage source 11 is according to the feedback electricity received
Pressure regulation output electric current is to ensure described constant output current.Specifically, the described feedback unit 15 that compares is an error comparator
A2, the voltage Vset that feedback voltage Vfb is set by voltage Vs on sampling resistor Rs and described reference power supply unit 12 is through error
Comparator A2 obtains.
In the present embodiment, described switch element 16 is arranged between described voltage source 11 and described load unit 13, is used for controlling
Make the break-make between described voltage source 11 and described load unit 13.Specifically, in the present embodiment, described switch element 16
Including metal-oxide-semiconductor or audion.It is to say, in the present embodiment, utilize metal-oxide-semiconductor or audion to control to export constant electricity
Break-make between voltage source 11 and the load under extraneous control signal of stream.Owing to metal-oxide-semiconductor or triode switch are very rapid,
So constant-current source can be allowed to realize current switching within the time of hundreds of nanosecond to several microseconds.
In the present embodiment, described voltage holding unit 17 be arranged at described voltage source 11 with described compare feedback unit 15 it
Between, feed back electricity for the maintenance when described voltage source 11 and described load unit 13 separated to described voltage source 11
Pressure.Wherein, described voltage holding unit 17 can be by following two circuit realiration at described voltage source 11 and described load unit
13 separated time maintenance to described voltage source 11 feedback voltage.
As shown in Figure 4, in the present embodiment, described voltage holding unit 17 includes: multiplexer, described multiplexer
First input end S1 be connected with the described feedback unit 15 (error amplifier shown in Fig. 4) that compares, described multiplexing
The outfan D of device is connected with described voltage source 11 (exporting feedback voltage Vfb to described voltage source 11)；Analog-digital converter (figure
ADC shown in 4), the first input end S1 being connected to described multiplexer compares between feedback unit 15 with described
For gathering described feedback voltage Vfb during conducting between described voltage source 11 and described load unit 13 on circuit；Digital-to-analogue turns
Parallel operation (DAC shown in Fig. 4), be connected with the second input S2 of described multiplexer and with described analog-digital converter
DAC is connected for when described voltage source 11 and described load unit 13 separated, continuing anti-for described feedback voltage Vfb
It is fed to the outfan D of described multiplexer.
In above-mentioned voltage holding unit 17, feedback voltage Vfb uses analog-digital converter ADC to sample.Work as constant-current source
When needing to close current source, feedback voltage Vfb is produced by analog-digital converter DAC, is used for keeping voltage source 11 output voltage not
Become.When constant-current source normally provides output electric current in running order, feedback voltage Vfb is set by described reference power supply unit 12
Voltage Vset and sampling resistor Rs sampling obtain actual voltage value between difference control.
As it is shown in figure 5, in the present embodiment, described voltage holding unit 17 can also be realized by circuits below: described voltage
Holding unit 17 includes: at least include analog switch and storage capacitor.
Specifically, described analog switch (MUX shown in Fig. 5), the first input end Y0 of described analog switch is with described
Relatively feedback unit 15 (error amplifier) connects, the second outfan Y1 filtered electric capacity C2 ground connection of described analog switch；Storage
Energy electric capacity C1, one end is connected with the outfan of described analog switch, other end ground connection, is used at described voltage source 11 with described
Charging during conducting between load unit 13, continues to described voltage during described voltage source 11 and described load unit 13 separated
Source 11 provides described voltage；Operational amplifier, normal phase input end is connected with the outfan of described storage capacitor and described analog switch,
Outfan is connected with described voltage source 11, for the voltage that described storage capacitor provides is amplified with described feedback voltage
Join.Wherein, through one for preventing the resistance connection of concussion to be followed by after the inverting input of described operational amplifier is connected with outfan
Ground.
It is to say, described voltage holding unit 17 can be by analog switch, storage capacitor and operational amplifier are constituted.Work as constant current
When source normally provides output electric current in running order, the voltage Vset that feedback voltage Vfb is set by described reference power supply unit 12
With the difference between the actual voltage value of sampling resistor Rs sampling acquisition controls, described storage capacitor is charged, when constant-current source needs
During current source to be closed, described storage capacitor continues to provide described voltage to described voltage source 11, by the electric capacity of described storage capacitor
Electric charge maintains voltage output.
In sum, the present invention utilizes the break-make between switch control voltage source and regulating load, and in described voltage source and regulation
During load separated, maintenance is to described voltage source feedback voltage, makes voltage source chip output electricity when electric current is switched on and off cut-out
Pressure keeps constant, when switch is again turned on, eliminates the Voltage Establishment time, and constant-current source can be allowed in hundreds of nanosecond to several microseconds
Realize current switching in time, efficiently solve opening and closing speed when using voltage source chip to do constant-current source in prior art slow
Problem.Present configuration is simple, controls flexibly, economical and practical, has wide applicability.So, effective gram of the present invention
Take various shortcoming of the prior art and have high industrial utilization.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Any it is familiar with this skill
Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by the personage of art.Therefore, such as
All that in art, tool usually intellectual is completed under without departing from disclosed spirit and technological thought etc.
Effect is modified or changes, and must be contained by the claim of the present invention.
Claims (10)
1. a constant-current source circuit, it is characterised in that: described constant-current source circuit includes:
Voltage source, is used for exporting constant current；
Reference power supply unit, is used for providing default reference voltage；
Load unit, is changed load voltage by described voltage source thus controls load current；
Sampling unit, is connected with described load unit, obtains sampled voltage for the electric current of described load unit is carried out sampling；
Relatively feedback unit, is connected with described reference power supply unit and described sampling unit respectively, for by described sampled voltage
And described reference voltage compares the voltage error obtained between described sampled voltage and described reference voltage and by described electricity
Hold up difference and feed back to described voltage source, so that described voltage source exports electric current to ensure institute according to the feedback voltage regulation received
State constant output current；
Switch element, is arranged between described voltage source and described load unit, is used for controlling described voltage source and described load
Break-make between unit；
Voltage holding unit, is arranged at described voltage source and compares between feedback unit with described, in described voltage source and institute
When stating load unit separated, maintenance is to described voltage source feedback voltage.
Constant-current source circuit the most according to claim 1, it is characterised in that: described switch element includes metal-oxide-semiconductor or audion.
Constant-current source circuit the most according to claim 1, it is characterised in that: described voltage holding unit includes:
Multiplexer, the first input end of described multiplexer is connected with the described feedback unit that compares, described multiplexing
The outfan of device is connected with described voltage source；
Analog-digital converter, be connected to the first input end of described multiplexer with on the described circuit compared between feedback unit
For gathering described feedback voltage during conducting between described voltage source and described load unit；
Digital to analog converter, is connected with the second input of described multiplexer and is connected in institute with described analog-digital converter
When stating voltage source and described load unit separated, continue to feed back to described feedback voltage the output of described multiplexer
End.
Constant-current source circuit the most according to claim 1, it is characterised in that: described voltage holding unit includes:
Analog switch, the first input end of described analog switch is connected with the described feedback unit that compares, the of described analog switch
Two output head groundings；
Storage capacitor, one end is connected with the outfan of described analog switch, other end ground connection, in described voltage source and institute
Charging when stating between load unit conducting, during described voltage source and described load unit separated, continuation carries to described voltage source
For described voltage；
Operational amplifier, normal phase input end is connected with the outfan of described storage capacitor and described analog switch, outfan and institute
State voltage source to be connected, for being amplified mating with described feedback voltage by the voltage that described storage capacitor provides.
Constant-current source circuit the most according to claim 4, it is characterised in that: the inverting input of described operational amplifier and outfan
After Xiang Lianing through one for prevent concussion resistance connect after ground connection.
Constant-current source circuit the most according to claim 1, it is characterised in that: described constant-current source circuit also includes: adopt described in being connected to
Sample unit and described compare feed back to after the sampled voltage of described sampling unit is amplified between feedback unit described
The relatively amplifying unit of feedback unit.
7. a constant-current source control method, it is characterised in that: described constant-current source control method includes:
Utilize the break-make between voltage source and the load under extraneous control signal of on-off control output constant current；
When described voltage source and described regulating load separated, the output voltage keeping described voltage source is constant.
Constant-current source control method the most according to claim 7, it is characterised in that: utilize metal-oxide-semiconductor or audion to control output perseverance
Determine the break-make between the voltage source of electric current and the load under extraneous control signal.
Constant-current source control method the most according to claim 7, it is characterised in that: described voltage source and described regulating load it
Time separated, keep that the output voltage of described voltage source is constant to be specifically included:
The feedback voltage of voltage source described in Gather and input during conducting between described voltage source and described regulating load, at described electricity
During potential source and described regulating load separated, continue described feedback voltage is fed back to described voltage source.
Constant-current source control method the most according to claim 7, it is characterised in that: described voltage source and described regulating load it
Time separated, keep that the output voltage of described voltage source is constant to be specifically included:
Storage electric energy during conducting between described voltage source and described regulating load, described voltage source and described regulating load it
Time separated, continue to provide voltage constant with the output voltage keeping described voltage source to described voltage source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610310670.2A CN105843315A (en) | 2016-05-11 | 2016-05-11 | Constant current source control method and constant current source circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610310670.2A CN105843315A (en) | 2016-05-11 | 2016-05-11 | Constant current source control method and constant current source circuit |
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| CN201610310670.2A Pending CN105843315A (en) | 2016-05-11 | 2016-05-11 | Constant current source control method and constant current source circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109358695A (en) * | 2018-12-26 | 2019-02-19 | 吉林大学 | A kind of loaded self-adaptive constant-current source device |
| CN109709400A (en) * | 2018-11-30 | 2019-05-03 | 西安航天计量测试研究所 | A kind of constant-current source circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7589987B2 (en) * | 2000-10-26 | 2009-09-15 | O2Micro International Limited | DC-to-DC converter with improved transient response |
| CN102045921A (en) * | 2009-10-14 | 2011-05-04 | 半导体元件工业有限责任公司 | Circuit having sample and hold feedback control and method |
| CN102339081A (en) * | 2010-07-15 | 2012-02-01 | 张永炬 | High-precision numerical control saw-tooth constant current source |
| CN103873058A (en) * | 2012-12-17 | 2014-06-18 | 达斯特网络公司 | Anti-aliasing sampling circuits and analog-to-digital converters |
| CN205721468U (en) * | 2016-05-11 | 2016-11-23 | 国神光电科技（上海）有限公司 | A kind of constant-current source circuit |
-
2016
- 2016-05-11 CN CN201610310670.2A patent/CN105843315A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7589987B2 (en) * | 2000-10-26 | 2009-09-15 | O2Micro International Limited | DC-to-DC converter with improved transient response |
| CN102045921A (en) * | 2009-10-14 | 2011-05-04 | 半导体元件工业有限责任公司 | Circuit having sample and hold feedback control and method |
| CN102339081A (en) * | 2010-07-15 | 2012-02-01 | 张永炬 | High-precision numerical control saw-tooth constant current source |
| CN103873058A (en) * | 2012-12-17 | 2014-06-18 | 达斯特网络公司 | Anti-aliasing sampling circuits and analog-to-digital converters |
| CN205721468U (en) * | 2016-05-11 | 2016-11-23 | 国神光电科技（上海）有限公司 | A kind of constant-current source circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709400A (en) * | 2018-11-30 | 2019-05-03 | 西安航天计量测试研究所 | A kind of constant-current source circuit |
| CN109709400B (en) * | 2018-11-30 | 2020-12-01 | 西安航天计量测试研究所 | Constant current source circuit |
| CN109358695A (en) * | 2018-12-26 | 2019-02-19 | 吉林大学 | A kind of loaded self-adaptive constant-current source device |
| CN109358695B (en) * | 2018-12-26 | 2020-08-11 | 吉林大学 | Load self-adaptive constant current source device |
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Application publication date: 20160810 |
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