CN107272805A - Digital Control Direct Current Source - Google Patents
Digital Control Direct Current Source Download PDFInfo
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- CN107272805A CN107272805A CN201710623620.4A CN201710623620A CN107272805A CN 107272805 A CN107272805 A CN 107272805A CN 201710623620 A CN201710623620 A CN 201710623620A CN 107272805 A CN107272805 A CN 107272805A
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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
- G05F1/561—Voltage to current converters
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- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
Present disclose provides a kind of Digital Control Direct Current Source, including：Host computer, output is connected with the input of control module；D/A modular converters, it is inputted is connected with control module output, and output is connected with the input of current generating module；The output of current generating module is connected with load, and it is inputted is connected with control module and the output of D/A modular converters, for producing required output current；The output of control module is connected with D/A modular converters, current generating module, input is connected to host computer, for receiving the instruction that host computer is sent, handled and generated the control signal of D/A control modules and current generating module, the D/A control modules and current generating module are controlled accordingly, the output current needed for producing.The Digital Control Direct Current Source of the disclosure can on a large scale export DC current according to output current size adjust automatically appropriate gain, operational amplifier is operated in stable region.
Description
Technical field
This disclosure relates to dc source field, more particularly to a kind of numerically-controlled precise DC current source.
Background technology
, it is necessary to DC current signal is added in system under test (SUT) straight to its in electronic circuit measurement particularly chip measurement
Stream parameter is tested.With the development of modernization science and technology, the requirement to high precision instrument instrument is also more next in these tests
It is higher.In traditional DC current source, generally existing is bulky, regulation is complicated, can not be in a wide range of interior accurate adjustment etc.
Shortcoming.Such as：Have using control digit-control resistance network to change the Traditional DC current source of output current size.Due to resistor network
Change between two grades is than larger, and so resulting in output current value can not be accurately controlled very much, particularly in some small electrics
It is even more bad in the range of stream (the even more small magnitude of such as na) to be accurately controlled output valve；Also by current regulator diode or perseverance
The reference constant current that the DC current source that stream triode is constituted can be realized is smaller, and application is narrow.
Disclosure
(1) technical problem to be solved
Present disclose provides a kind of numerically-controlled precise DC current source, asked with the technology at least partly solving set forth above
Topic.
(2) technical scheme
According to an aspect of this disclosure there is provided a kind of Digital Control Direct Current Source, including：Host computer, output and control
The input of module is connected；D/A modular converters, it is inputted is connected with control module output, output and the input of current generating module
It is connected；The output of current generating module is connected with load, and it is inputted is connected with control module and the output of D/A modular converters, is used for
Output current needed for producing；The output of control module is connected with D/A modular converters, current generating module, and input is connected to
Position machine, for receiving the instruction that host computer is sent, is handled and generates D/A control modules and the control of current generating module letter
Number, the D/A control modules and current generating module are controlled accordingly, the output current needed for producing.
In the disclosure some embodiments, the current generating module includes：Power amplifier module, input is connected to D/
The output end of A modular converters and sampling module, is produced for receiving the voltage signal and sampling module of the generation of D/A modular converters
Sampled signal, output is connected to the input of measurement range selection module and sampling module, for the voltage signal obtained by computing to be passed
Give range selecting module and sampling module；Measurement range selection module, control signal is connected to control module output end, for connecing
The control signal that control module is produced is received, while measurement range selection module input is also connected with power amplifier module, its fortune is received
Voltage signal obtained by calculation, the output end of measurement range selection module is connected to load and sampling module, passes through range conversion and output
Current sample feeds back, the electric current required for output；Sampling module, control signal is connected to control module output end, for connecing
The control signal that control module is produced is received, while the first input end of sampling module and the output end of power amplifier are connected, second
Input is connected with the output end of measurement range selection module, for the voltage difference at range selecting module two ends of sampling, while by computing
The magnitude of voltage gone out, which is exported, gives power amplifier module, forms feedback network.
In the disclosure some embodiments, in the current generating module, power amplifier module include power amplifier device,
The output end of resistance R1 and R2, D/A modular converter is connected to resistance R1 first end, and resistance R1 the second end is connected to resistance R2
First end and power amplifier device first input end, the second input end grounding of power amplifier device, power amplifier device
Output end be connected with the first input end of measurement range selection module input and sampling module, the ends of resistance R2 second and sampling module
Output end be connected；Measurement range selection module includes multiple sampling resistor branch in parallel, its one end connection power amplifier device
Output end, the other end connect sampling resistor two ends in the second input of sampling module, each in parallel branch road set respectively after
Electric switch；Sampling module includes 5 operational amplifiers, and wherein amplifier A1 input is connected to the defeated of power amplifier device
Go out end, output end is connected to amplifier A3 input, and amplifier A2 input is connected to the output end of measurement range selection module,
Amplifier A2 output end is connected to amplifier A3 input, and amplifier A3 output end is connected to switch Km1 first end,
The switch Km1 first via is directly connected to the ends of resistance R2 second of power amplifier module, switchs amplification of the tunnels of Km1 second by series connection
Device A4, A5 and switch Km2 are connected to the ends of resistance R2 second of power amplifier module.
In the disclosure some embodiments, host computer by control module send the opening of power supply, close, range is selected
Select, the instruction of output current size is controlled to Digital Control Direct Current Source.
In the disclosure some embodiments, control module includes PLD and host computer interface circuit, passes through
Enter row decoding to the instruction that the host computer of reception is sent, in the control sequential and current generating module that produce D/A modular converters
Switch controlling signal, makes D/A modular converters be cooperated with current generating module, the output current needed for producing.
In the disclosure some embodiments, the D/A modular converters include D/A converter and D/A reference voltage generators
And its peripheral circuit.
In the disclosure some embodiments, the Digital Control Direct Current Source also includes：Externally fed module, with control mould
Block, D/A modular converters, current generating module are connected, and are that the control module, D/A modular converters, current generating module are powered.
In the disclosure some embodiments, wherein current generating module can be configured to greatly according to the control signal of control module
Current generating module and low current generation module.
In the disclosure some embodiments, the output of host computer is connected with the input of control module, on control module is received
The instruction of position machine, is converted to control logic, the D/A modular converters that control to be connected with control module output end, measurement range selection module,
Sampling module；The control logic of D/A modular converter receive and control modules, exports corresponding voltage signal Vin and gives power amplifier mould
The first input end of block, the output voltage of power amplifier module is denoted as Vr, and the output voltage of measurement range selection module is denoted as Vo, output
Electric current is the output current Io of current source, and the output voltage of sampling module is denoted as V4, in power amplifier module, Vin and V4 points
It is not connected by resistance R1, R2 with power amplifier, wherein R1=R2, the second input end grounding of power amplifier, now Vin=-
V4；In measurement range selection module, a shared n/2 range, n=2,4,6..., measurement range selection module is according to the control received
Signal, closes the switch at a sampling resistor Rs two ends, now Vr-Vo=Io × Rs.
In the disclosure some embodiments, when current generating module is configured to high current generation module, in sampling module
In, switch Km1 A, B end conducting, Km2 closures, amplifier A4, A5 do not access circuit, Vr and Vo respectively by gain for-| G1 |
Amplifier A1 and gain be | G1 | amplifier A2 and gain for-| G2 | amplifier A3 be connected, amplifier A3 input is electric
Press as V1, now amplifier A3 output voltage V2 is exactly the output voltage V4, V4=- of sampling module | G2 | V1；V1=- | G1 |
Vr+|G1|Vo；Can obtain output current size is：It is configured in current generating module
During low current generation module, in sampling module, A, C-terminal conducting, the Km2 for switching Km1 are closed, and Vr and Vo pass through gain respectively
For-| G1 | the A1 of amplifier and gain be | G1 | amplifier A2 and gain for-| G2 | amplifier A3 be connected, amplifier A4 with
A5 gain is respectively-| G3 | and-| G4 |, amplifier A3 input voltage is that V1, amplifier A3 output voltage are V2, amplification
Device A4 output voltage is that V3, amplifier A5 output voltage are V4, V4=- | G4 | V3, V3=- | and G3 | V2, V2=- | G2 |
V1, V1=- | G1 | Vr+ | G1 | Vo；Can obtain output current size is：
(3) beneficial effect
It can be seen from the above technical proposal that the disclosure at least has the advantages that one of them：
(1) control module being made up of PLD can be according to output current size adjust automatically sampling module
To appropriate gain, DC current (from several pico-amperes to several amperes) can be exported on a large scale, operational amplifier is operated in stable area
Domain；
(2) selected as a result of the range that PLD, D/A modular converters and high precision sampling resistance are constituted
Module is selected, equally accurate regulation is carried out in gamut, size of current regulation digitlization is realized；PLD is as needed
Switch on and off in the size of output current, flexible switch sampling module, makes the amplifier number for participating in computing in sampling module can
Increased and decreased according to size of current, so that holding circuit is stable；
(3) as a result of PLD and D/A conversion module, the voltage for being input to power amplifier module can be just
It can bear, therefore bidirectional current can be exported；
(4) it is used for that the component that uses is easy to use to be easy to purchase, the current source small volume of realization, output area are wide, essence
Degree is high and easily controllable, is with a wide range of applications.
Brief description of the drawings
Fig. 1 is embodiment of the present disclosure numerically-controlled precise DC current source block diagram.
Fig. 2 is embodiment of the present disclosure current generating module theory diagram.
Fig. 3 is embodiment of the present disclosure numerically-controlled precise DC current source high current generation module circuit diagram.
Fig. 4 is embodiment of the present disclosure numerically-controlled precise DC current source low current generation module circuit diagram.
Embodiment
For the purpose, technical scheme and advantage of the disclosure are more clearly understood, below in conjunction with specific embodiment, and reference
Accompanying drawing, the disclosure is further described.
The some embodiments of the disclosure will be done with reference to appended accompanying drawing in rear and more comprehensively describe to property, some of but not complete
The embodiment in portion will be illustrated.In fact, the various embodiments of the disclosure can be realized in many different forms, and it should not be construed
To be limited to this several illustrated embodiment；Relatively the disclosure is caused to meet applicable legal requirement there is provided these embodiments.
There is provided a kind of numerically-controlled precise DC current source in first exemplary embodiment of the disclosure.Fig. 1 is this public affairs
Open first embodiment numerically-controlled precise DC current source block diagram.As shown in figure 1, disclosure numerically-controlled precise DC current source includes：On
Totally six parts are constituted for position machine, control module, D/A modular converters, current generating module, externally fed module, load.Host computer
Output be connected with the input of control module；The output of control module is connected with D/A modular converters, current generating module, control
Module receives the instruction that host computer is sent, and is converted to the control signal of D/A control modules and current generating module, and to the two
Module is controlled accordingly；The output of D/A modular converters is connected with the input of current generating module；Current generating module it is defeated
Go out and be connected with load, for the electric current needed for load is provided；Externally fed module is produced with control module, D/A modular converters, electric current
Module is connected, and is these three module for power supply.
Each part of the present embodiment numerically-controlled precise DC current source is described in detail individually below.
Host computer output is connected to control module, for control module send the opening of power supply, close, measurement range selection,
The instruction such as output current size is controlled to numerical control precision DC current source；
Control module includes PLD and host computer interface circuit etc., and the output of control module is connected to D/A
Modular converter and current generating module, for receiving instruction that host computer sends and to instructing into row decoding, producing D/A moduluss of conversion
Switch controlling signal in the control sequential and current generating module of block, makes D/A modular converters cooperate with work with current generating module
Make, the output current needed for producing.
D/A modular converters include D/A converter and D/A reference voltage generators and its peripheral circuit, and its output is connected to
Current generating module, for providing the voltage needed for electric current is produced for current generating module.
Current generating module includes power amplifier module, measurement range selection module and sampling module and constituted, needed for for producing
Output current.Fig. 2 is embodiment of the present disclosure current generating module theory diagram, as shown in Fig. 2 power in current generating module
Amplifier module input is connected to the output end of D/A modular converters and sampling module, the electricity for receiving the generation of D/A modular converters
The sampled signal for pressing signal and sampling module to produce, output is connected to the input of measurement range selection module and sampling module, is used for
Send the voltage signal obtained by computing to measurement range selection module and sampling module；The control of measurement range selection module and sampling module
Input is connected to control module output end, the control signal produced for receive and control module, the output of measurement range selection module
End is connected to load and sampling module, by range conversion and output current sampling feedback, the electric current required for output.
Power amplifier module input is connected to the output end of D/A modular converters and sampling module, for receiving D/A conversions
The sampled signal that the voltage signal and sampling module that module is produced are produced, output is connected to measurement range selection module and sampling module
Input, for sending the voltage signal obtained by computing to measurement range selection module and sampling module.Power amplifier module includes
Power amplifier device and peripheral circuit.Preferably, peripheral circuit includes resistance R1 and the output end of R2, D/A modular converter connects
Resistance R1 first end is connected to, resistance R1 the second end is connected to resistance R2 first end and the first input of power amplifier device
End, the second input end grounding of power amplifier device, the output end of power amplifier device and the input of measurement range selection module and
The first input end of sampling module is connected, and the ends of resistance R2 second are connected with the output end of sampling module.
The control signal of measurement range selection module is connected to control module output end, the control produced for receive and control module
Signal processed, while measurement range selection module is also connected with power amplifier module, receives the voltage signal obtained by its computing, measurement range selection
The output end of module is connected to load and sampling module, by range conversion and output current sampling feedback, and output is required
Electric current.Measurement range selection module includes relay network and precision resistance network.Preferably, the measurement range selection module includes multiple
Sampling resistor in parallel, its one end connects the output end of power amplifier device, and the other end connects the second input of sampling module,
Sampling resistor two ends set relay switch respectively in each branch road in parallel.
The control signal of sampling module is connected to control module output end, the control letter produced for receive and control module
Number, while the first input end of sampling module is connected with the output end of power amplifier module, the second input and measurement range selection mould
The output end connection of block, for the voltage difference at range selecting module two ends of sampling, while the magnitude of voltage calculated is exported to work(
Rate amplifier module, forms feedback network.It includes multiple operational amplifiers and its peripheral circuit.Preferably, the operation amplifier
Device quantity is 5, and wherein amplifier A1 input is connected to the output end of power amplifier device, and output end is connected to amplifier
A3 input, amplifier A2 input is connected to the output end of measurement range selection module, and amplifier A2 output end is connected to
Amplifier A3 input, amplifier A3 output end is connected to switch Km1 first end, and the switch Km1 first via is directly connected to
To the ends of resistance R2 second of power amplifier module, amplifier A4, the A5 and switch Km2 connections of the switch tunnels of Km1 second by series connection
To the ends of resistance R2 second of power amplifier module.
Fig. 3 is embodiment of the present disclosure Digital Control Direct Current Source high current generation module circuit diagram.As shown in figure 3, host computer
Output be connected with the input of control module, control module receives the instruction of host computer, is converted to control logic, control and control
The connected D/A modular converters of module output end, measurement range selection module, sampling module.The output end of D/A modular converters is transported with power
The first input end of amplification module is connected, the control logic of D/A modular converter receive and control modules, exports corresponding voltage signal
First input ends of the Vin to power amplifier module.The input of the output end of power amplifier module and measurement range selection module and adopt
The first input end of egf block is connected, and the output voltage of power amplifier module is denoted as Vr.The output end of measurement range selection module is with adopting
Second input of egf block is connected with the input of load, and the output voltage of measurement range selection module is denoted as Vo, and output current is
The output current Io of current source.The output end of sampling module is connected with the second input of power amplifier module, sampling module
Output voltage is denoted as V4.In power amplifier module, Vin is connected by resistance R1, R2 with power amplifier respectively with V4, wherein R1
=R2, the second input end grounding of power amplifier, now Vin=-V4.In measurement range selection module, a shared n/2 (n=2,4,
6...) individual range, measurement range selection module closes the switch at a sampling resistor Rs two ends according to the control signal received, this
When Vr-Vo=Io × Rs.In sampling module, switch Km1 A, B end conducting, Km2 closures, amplifier A4, A5 do not access electricity
Road, Vr and Vo respectively by amplifier A1 (gain for-| G1 |) and amplifier A2 (gain be | G1 |) and amplifier A3 (gains
For-| G2 |) it is connected, amplifier A3 input voltage is V1, and now amplifier A3 output voltage V2 is exactly the defeated of sampling module
Go out voltage V4, V4=- | G2 | V1；V1=- | G1 | Vr+ | G1 | Vo.Can obtain output current size is：
Fig. 4 is embodiment of the present disclosure numerically-controlled precise DC current source high current generation module circuit diagram.As shown in figure 4, on
The position output of machine is connected with the input of control module, and control module receives the instruction of host computer, is converted to control logic, control and
The connected D/A modular converters of control module output end, measurement range selection module, sampling module.The output end and work(of D/A modular converters
The first input end of rate amplifier module is connected, the control logic of D/A modular converter receive and control modules, exports corresponding voltage letter
Number first input ends of the Vin to power amplifier module.The output end of power amplifier module and the input of measurement range selection module and
The first input end of sampling module is connected, and the output voltage of power amplifier module is denoted as Vr.The output end of measurement range selection module with
Second input of sampling module is connected with the input of load, and the output voltage of measurement range selection module is denoted as Vo, output current
For the output current Io of current source.The output end of sampling module is connected with the second input of power amplifier module, sampling module
Output voltage be denoted as V4.In power amplifier module, Vin is connected by resistance R1, R2 with power amplifier respectively with V4, wherein
R1=R2, the second input end grounding of power amplifier, now Vin=-V4.In measurement range selection module, a shared n/2 (n=2,
4,6...) individual range, measurement range selection module closes the switch at a sampling resistor Rs two ends according to the control signal received,
Now Vr-Vo=Io × Rs.In sampling module, A, C-terminal conducting, the Km2 for switching Km1 are closed, and Vr and Vo pass through amplification respectively
Device A1 (gain for-| G1 |) and amplifier A2 (gain be | G1 |) and amplifier A3 (gain is-| G2 |) be connected, amplifier A3's
Input voltage is that V1, amplifier A3 output voltage are that V2, amplifier A4 output voltage are V3, amplifier A5 output voltage
For V4, V4=- | G4 | V3, V3=- | G3 | V2, V2=- | G2 | V1, V1=- | G1 | Vr+ | G1 | Vo；.It can obtain output current big
It is small to be：
The numerically-controlled precise DC current source of the present invention is in order to ensure circuit stability, and current source operationally, put by all computings
Big module multiplication factor absolute value is no more than 20 times.To export suitable electric current and keeping electric current stable, current source is in work
When, it will be selected to participate in the amplifier number of computing according to the size of circuit output current.To eliminate the sampling resistor of non-range
The thermal noise of introducing, gating switch is provided with each sampling resistor two ends, one sampling resistor two ends of each only closure
Gating switch.
Certainly, above-mentioned hardware configuration should also be comprising functional modules such as power module (not shown), and these are in the art
Those skilled in the art it should be understood that those skilled in the art in the art can also be according to function the need for, addition is corresponding
Functional module, therefore not to repeat here.
So far, first embodiment of the present disclosure numerically-controlled precise DC current source introduction is finished.
So far, the embodiment of the present disclosure is described in detail combined accompanying drawing.It should be noted that in accompanying drawing or saying
In bright book text, the implementation for not illustrating or describing is form known to a person of ordinary skill in the art in art, and
It is not described in detail.In addition, the above-mentioned definition to each element and method be not limited in mentioning in embodiment it is various specific
Structure, shape or mode, those of ordinary skill in the art simply can be changed or be replaced to it.
It should also be noted that, the direction term mentioned in embodiment, for example " on ", " under ", "front", "rear", " left side ",
" right side " etc., is only the direction of refer to the attached drawing, not for limiting the protection domain of the disclosure.Through accompanying drawing, identical element by
Same or like reference is represented.When understanding of this disclosure may be caused to cause to obscure, conventional structure will be omitted
Or construction.
And the shape and size of each part do not reflect actual size and ratio in figure, and only illustrate the embodiment of the present disclosure
Content.In addition, in the claims, any reference symbol between bracket should not be configured to the limit to claim
System.
Furthermore, word "comprising" does not exclude the presence of element or step not listed in the claims.Before element
Word "a" or "an" does not exclude the presence of multiple such elements.
Word of the specification with the ordinal number used in claim such as " first ", " second ", " the 3rd ", to modify
Corresponding element, itself is not meant to that the element has any ordinal number, and the suitable of a certain element and another element is not represented yet
Order in sequence or manufacture method, the use of those ordinal numbers is only used for enabling an element and another tool with certain name
The element for having identical name can make clear differentiation.
Those skilled in the art, which are appreciated that, to be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more equipment different from the embodiment.Can be the module or list in embodiment
Member or component be combined into a module or unit or component, and can be divided into addition multiple submodule or subelement or
Sub-component.In addition at least some in such feature and/or process or unit exclude each other, it can use any
Combination is disclosed to all features disclosed in this specification (including adjoint claim, summary and accompanying drawing) and so to appoint
Where all processes or unit of method or equipment are combined.Unless expressly stated otherwise, this specification (including adjoint power
Profit is required, summary and accompanying drawing) disclosed in each feature can or similar purpose identical, equivalent by offer alternative features come generation
Replace.If also, in the unit claim of equipment for drying is listed, several in these devices can be by same hard
Part is embodied.
Similarly, it will be appreciated that in order to simplify the disclosure and help to understand one or more of each open aspect, exist
Above in the description of exemplary embodiment of this disclosure, each feature of the disclosure is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the method for the disclosure should be construed to reflect following intention：It is i.e. required to protect
The disclosure of shield requires features more more than the feature being expressly recited in each claim.More precisely, such as following
Claims reflect as, open aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following embodiment are expressly incorporated in the embodiment, wherein each claim is in itself
All as the separate embodiments of the disclosure.
Particular embodiments described above, purpose of this disclosure, technical scheme and beneficial effect have been carried out further in detail
Describe in detail bright, should be understood that the specific embodiment that the foregoing is only the disclosure, be not limited to the disclosure, it is all
Within the spirit and principle of the disclosure, any modification, equivalent substitution and improvements done etc. should be included in the guarantor of the disclosure
Within the scope of shield.
Claims (10)
1. a kind of Digital Control Direct Current Source, including：
Host computer, output is connected with the input of control module；
D/A modular converters, it is inputted is connected with control module output, and output is connected with the input of current generating module；
The output of current generating module is connected with load, and it is inputted is connected with control module and the output of D/A modular converters, for producing
Raw required output current；
The output of control module is connected with D/A modular converters, current generating module, and input is connected to host computer, for reception
The instruction that position machine is sent, is handled and is generated the control signal of D/A control modules and current generating module, and the D/A is controlled
Molding block and current generating module are controlled accordingly, the output current needed for producing.
2. Digital Control Direct Current Source according to claim 1, the current generating module includes：
Power amplifier module, input is connected to the output end of D/A modular converters and sampling module, for receiving D/A moduluss of conversion
The sampled signal that the voltage signal and sampling module that block is produced are produced, output is connected to the defeated of measurement range selection module and sampling module
Enter end, for sending the voltage signal obtained by computing to measurement range selection module and sampling module；
Measurement range selection module, control signal is connected to control module output end, the control letter produced for receive and control module
Number, while measurement range selection module input is also connected with power amplifier module, receive the voltage signal obtained by its computing, range choosing
The output end for selecting module is connected to load and sampling module, by range conversion and output current sampling feedback, required for output
Electric current；
Sampling module, control signal is connected to control module output end, the control signal produced for receive and control module, together
When sampling module first input end be connected with the output end of power amplifier module, the second input is defeated with measurement range selection module
Go out end connection, for the voltage difference at range selecting module two ends of sampling, while the magnitude of voltage calculated is exported to power amplifier
Module, forms feedback network.
3. in Digital Control Direct Current Source according to claim 2, the current generating module,
The output end that power amplifier module includes power amplifier device, resistance R1 and R2, D/A modular converter is connected to resistance R1's
First end, resistance R1 the second end is connected to resistance R2 first end and the first input end of power amplifier device, power amplifier
Second input end grounding of device, the output end and measurement range selection module input of power amplifier device and the first of sampling module
Input is connected, and the ends of resistance R2 second are connected with the output end of sampling module；
Measurement range selection module includes multiple sampling resistor branch in parallel, and its one end connects the output end of power amplifier device, separately
One end connects sampling resistor two ends in the second input of sampling module, each branch road in parallel and sets relay switch respectively；
Sampling module includes 5 operational amplifiers, and wherein amplifier A1 input is connected to the output end of power amplifier device,
Output end is connected to amplifier A3 input, and amplifier A2 input is connected to the output end of measurement range selection module, amplification
Device A2 output end is connected to amplifier A3 input, and amplifier A3 output end is connected to switch Km1 first end, switch
The Km1 first via is directly connected to the ends of resistance R2 second of power amplifier module, switchs amplifier of the tunnels of Km1 second by series connection
A4, A5 and switch Km2 are connected to the ends of resistance R2 second of power amplifier module.
4. Digital Control Direct Current Source according to claim 3, wherein, host computer to control module by sending opening for power supply
Logical, closing, measurement range selection, the instruction of output current size are controlled to Digital Control Direct Current Source.
5. Digital Control Direct Current Source according to claim 4, wherein, control module includes PLD and upper
Row decoding is entered in machine interface circuit, the instruction sent by the host computer to reception, produces the control sequential and electricity of D/A modular converters
The switch controlling signal in generation module is flowed, D/A modular converters is cooperated with current generating module, the output needed for producing
Electric current.
6. Digital Control Direct Current Source according to claim 5, the D/A modular converters include D/A converter and D/A benchmark
Voltage generator and its peripheral circuit.
7. Digital Control Direct Current Source according to claim 6, in addition to：
Externally fed module, is connected with control module, D/A modular converters, current generating module, be the control module, D/A turn
Mold changing block, current generating module are powered.
8. Digital Control Direct Current Source according to claim 3, wherein current generating module can be according to the controls of control module
Signal is configured to high current generation module and low current generation module.
9. Digital Control Direct Current Source according to claim 8, the output of host computer is connected with the input of control module, control
Module receives the instruction of host computer, is converted to control logic, controls D/A modular converters, the amount being connected with control module output end
Journey selecting module, sampling module；The control logic of D/A modular converter receive and control modules, export corresponding voltage signal Vin to
The first input end of power amplifier module, the output voltage of power amplifier module is denoted as Vr, the output voltage of measurement range selection module
Vo is denoted as, output current is the output current Io of current source, and the output voltage of sampling module is denoted as V4, in power amplifier module
In, Vin is connected by resistance R1, R2 with power amplifier respectively with V4, wherein R1=R2, the second input termination of power amplifier
Ground, now Vin=-V4；In measurement range selection module, one have n/2 range, n=2,4,6..., measurement range selection module according to
The control signal received, closes the switch at a sampling resistor Rs two ends, now Vr-Vo=Io × Rs.
10. Digital Control Direct Current Source according to claim 9, high current generation module is configured in current generating module
When, in sampling module, switch Km1 A, B end conducting, Km2 closures, amplifier A4, A5 do not access circuit, and Vr and Vo lead to respectively
Cross gain for-| G1 | amplifier A1 and gain be | G1 | amplifier A2 and gain for-| G2 | amplifier A3 be connected, amplification
Device A3 input voltage is V1, and now amplifier A3 output voltage V2 is exactly the output voltage V4, V4=- of sampling module | G2 |
V1；V1=- | G1 | Vr+ | G1 | Vo；Can obtain output current size is：
When current generating module is configured to low current generation module, in sampling module, Km1 A, C-terminal conducting, Km2 is switched
Closure, Vr and Vo respectively by gain for-| G1 | the A1 of amplifier and gain be | G1 | amplifier A2 and gain for-| G2 |
Amplifier A3 is connected, and amplifier A4 and A5 gain is respectively-| G3 | and-| G4 |, amplifier A3 input voltage is V1, amplification
Device A3 output voltage is that V2, amplifier A4 output voltage are that V3, amplifier A5 output voltage are V4, V4=- | G4 | V3,
V3=- | G3 | V2, V2=- | G2 | V1, V1=- | G1 | Vr+ | G1 | Vo；Can obtain output current size is：
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994878A (en) * | 2017-11-28 | 2018-05-04 | 中科亿海微电子科技（苏州）有限公司 | Low-noise amplifier and emulation bus receiver for emulation bus receiver |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4756201B2 (en) * | 2005-05-26 | 2011-08-24 | 富士電機株式会社 | Power circuit |
| CN102455727A (en) * | 2010-10-28 | 2012-05-16 | 南京航空航天大学 | Current control circuit |
| CN202794913U (en) * | 2012-04-16 | 2013-03-13 | 余丽华 | Numeral-control current source device of one-chip microcomputer |
| CN103218000A (en) * | 2012-01-20 | 2013-07-24 | 中国科学院电子学研究所 | Numerical-control direct-current current source |
| CN103217999A (en) * | 2012-01-20 | 2013-07-24 | 中国科学院电子学研究所 | Numerical-control direct-current power source |
| CN105322807A (en) * | 2014-07-04 | 2016-02-10 | 株式会社安川电机 | Matrix convertor, power generation system, and method for controlling power factor |
| CN106464222A (en) * | 2016-08-24 | 2017-02-22 | 香港应用科技研究院有限公司 | DB linear, low-voltage and programmable/variable gain amplifier utizling recursion current distribution |
-
2017
- 2017-07-27 CN CN201710623620.4A patent/CN107272805B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4756201B2 (en) * | 2005-05-26 | 2011-08-24 | 富士電機株式会社 | Power circuit |
| CN102455727A (en) * | 2010-10-28 | 2012-05-16 | 南京航空航天大学 | Current control circuit |
| CN103218000A (en) * | 2012-01-20 | 2013-07-24 | 中国科学院电子学研究所 | Numerical-control direct-current current source |
| CN103217999A (en) * | 2012-01-20 | 2013-07-24 | 中国科学院电子学研究所 | Numerical-control direct-current power source |
| CN202794913U (en) * | 2012-04-16 | 2013-03-13 | 余丽华 | Numeral-control current source device of one-chip microcomputer |
| CN105322807A (en) * | 2014-07-04 | 2016-02-10 | 株式会社安川电机 | Matrix convertor, power generation system, and method for controlling power factor |
| CN106464222A (en) * | 2016-08-24 | 2017-02-22 | 香港应用科技研究院有限公司 | DB linear, low-voltage and programmable/variable gain amplifier utizling recursion current distribution |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994878A (en) * | 2017-11-28 | 2018-05-04 | 中科亿海微电子科技（苏州）有限公司 | Low-noise amplifier and emulation bus receiver for emulation bus receiver |
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