CN105549669A - Constant current source device based on dual ring negative feedback - Google Patents
Constant current source device based on dual ring negative feedback Download PDFInfo
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- CN105549669A CN105549669A CN201511009383.XA CN201511009383A CN105549669A CN 105549669 A CN105549669 A CN 105549669A CN 201511009383 A CN201511009383 A CN 201511009383A CN 105549669 A CN105549669 A CN 105549669A
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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
- G05F1/461—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using an operational amplifier as final control device
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
Abstract
The invention discloses a constant current source device based on dual ring negative feedback and belongs to the technical field of electronic technique. The device comprises a current limitation setting module (2), a current setting module (3), a current output module (7) and a first feedback module (8) and is characterized by further comprising a reference voltage module (1), a subtractor module (4), a PID control module (5), a summator module (6), a second feedback module (9), a current limitation display module (10), an output current display module (11) and a front panel (12). The dual ring negative feedback structure is adopted, and the device has the advantages that output current is highly stable, safety performance is high, and the application range is wide.
Description
Technical field
The invention belongs to the technical field of electronic technology.In particular to one based on the degenerative constant-current source device of dicyclo.
Background technology
Constant current source has important application in a lot of field such as LED driving, laser instrument driving, sensor driving, various glow discharge source drivings.In some specific application area, the degree of stability of constant current source output current is most important, and as driven in application at laser instrument, small curent change will cause the very big change of Output optical power and excitation wavelength, and these changes directly jeopardize the safe handling of device.The measure of conventional raising current stability, comprises: 1, utilize the nonlinear magnetization principle of magnetic saturation reactor to improve stability; 2, to connect in load circuit large resistance (relative to pull-up resistor); 3, electric current autostable is realized by negative feedback network.In this several scheme, the first scheme is comparatively large by the impact of device itself, limited to the raising of degree of stability; First scheme is due to large resistance of having connected in load circuit, effectively can reduce the impact of change on output current of pull-up resistor, but due to the existence of resistance large in load circuit, make to export very little electric current when supply voltage is certain, generally can only in milliampere level, and most of voltage all falls on large resistance, also make efficiency extremely low; The automatic regulating function that the third scheme has due to negative feedback network itself, output current autostable can be made, and by the impact of load change, be therefore the most effective method improving current stability, at present, but in current published technology, general is all take single linear feedback network, the shortcoming of this scheme is: first, once feedback network breaks down, system will be in operate in open loop state state, output current will sharply increase, and be easy to damage load and circuit itself; Secondly, use occasion is restricted, and can only be applied in the occasion that load is linear response to electric current, under some specific occasion, as load exists delay or advanced situation to the response of electric current, the constant current effect of this constant current source based on single linear feedback network can be had a greatly reduced quality.
Summary of the invention
The technical problem to be solved in the present invention is, for the shortcoming that prior art exists, provides a kind of high stability constant-current source device controlled based on ring feedback PID.
Concrete technical scheme of the present invention is:
A kind of based on the degenerative constant-current source device of dicyclo, limited configurations stream arranges module 2, electric current arranges module 3, current output module 7 and the first feedback module 8, it is characterized in that, structure also has reference voltage module 1, subtracter block 4, pid control module 5, adder Module 6, second feedback module 9, current limliting display module 10, output current display module 11 and front panel 12, the output that current limliting arranges module 2 is connected with the input that electric current arranges module 3, the output that electric current arranges module 3 connects the control inputs of subtracter block 4, the output of the second feedback module 9 connects the feed back input of subtracter block 4, the output of subtracter block 4 connects the input of pid control module 5, the output of pid control module 5 connects the input of adder Module 6, the output of reference voltage module 1 connects subtracter block 4 respectively, the reference voltage input of pid control module 5 and adder Module 6, the output of adder Module 6 connects the control inputs of current output module 7, the output of the first feedback module 8 connects the feed back input of current output module 7, the output of current output module 7 connects the first feedback module 8, the input of the second feedback module 9 and output current display module 11, the output of output current display module 11 connects a selecting side of front panel 12 breaker in middle SW1, the output that current limliting arranges module 2 also connects the input of current limliting display module 10, and the output of current limliting display module connects another selecting side of front panel 12 breaker in middle SW1, the electric current that two core interface Header2 of current output module 7 connect on front panel 12 exports 120,
The structure of described reference voltage module 1 is: a termination power VCC of resistance R1, the in-phase input end of another termination amplifier U5A and one end of resistance R2, the other end ground connection of resistance R2, one end of the anti-phase input terminating resistor R3 of amplifier U5A, the output terminal of another termination amplifier U5A of resistance R3, the positive supply termination power VCC of amplifier U5A, negative power end ground connection, the output terminal of the output terminal of amplifier U5A module 1 as the reference voltage, is designated as port Vref;
The structure that described current limliting arranges module 2 is: a termination power VCC of resistance R4,1 pin of another termination 3 core interface Header31 and the negative pole of voltage stabilizing diode D1,3 pin of 3 core interface Header31 and the plus earth of voltage stabilizing diode D1,2 pin of 3 core interface Header31 connect the in-phase input end of amplifier U1A, the output terminal of the anti-phase input termination amplifier U1A of amplifier U1A, the positive supply termination power VCC of amplifier U1A, negative power end ground connection, the output terminal of amplifier U1A arranges the output terminal of module 2 as current limliting, be designated as port Ilim;
The structure that described electric current arranges module 3 is: 1 pin of 3 core interface Header32 meets the port Ilim that current limliting arranges module 2, the 3 pin ground connection of 3 core interface Header32, one end of the 2 pin connecting resistance R5 of 3 core interface Header32, the in-phase input end of another termination amplifier U1B of resistance R5, the anti-phase input terminating resistor R6 of amplifier U1B and one end of resistance R7, the other end ground connection of resistance R6, the output terminal of another termination amplifier U1B of resistance R7, the output terminal of amplifier U1B arranges the output terminal of module 3 as electric current, be designated as port Iset;
The structure of described subtracter block 4 is: a termination electric current of resistance R9 arranges the port Iset of module 3, the in-phase input end of another termination amplifier U2A and one end of resistance R8, the port Vref of another termination reference voltage module 1 of resistance R8, the port Vfd2 of one termination second feedback module 9 of resistance R10, one end of another termination amplifier U2A inverting input and resistance R11, the output terminal of another termination amplifier U2A of resistance R11, the positive supply termination power VCC of amplifier U2A, negative power end ground connection, the output terminal of amplifier U2A is as the output terminal of subtracter block 4, be designated as port Vdiff,
The structure of described pid control module 5 is: the port Vdiff of a termination subtracter block 4 of resistance R13, the inverting input of another termination amplifier U2B and one end of resistance R12, one end of another termination slide rheostat W3 of resistance R12, the output terminal of the slip termination amplifier U2B of slide rheostat W3, one end of the in-phase input end connecting resistance R16 of amplifier U2B, the port Vref of another termination reference voltage module 1 of resistance R16, the output terminal of amplifier U2B, as an output terminal of pid control module 5, is designated as port Vk; The port Vdiff of the one termination subtracter block 4 of resistance R14, one end of another termination slide rheostat W4, the inverting input of slip termination amplifier U3A of slide rheostat W4 and one end of electric capacity C1, the output terminal of another termination amplifier U3A of electric capacity C1, one end of the in-phase input end connecting resistance R17 of amplifier U3A, the port Vref of another termination reference voltage module 1 of resistance R17, the positive supply termination power VCC of amplifier U3A, negative power end ground connection, the output terminal of amplifier U3A, as an output terminal of pid control module 5, is designated as port Vint; The port Vdiff of the one termination subtracter block 4 of electric capacity C3, one end of the inverting input of another termination amplifier U3B, one end of electric capacity C2 and resistance R15, the output terminal of another termination amplifier U3B of electric capacity C2, one end of another termination slide rheostat W5 of resistance R15, the output terminal of the slip termination amplifier U3B of slide rheostat W5, one end of the in-phase input end connecting resistance R18 of amplifier U3B, the port Vref of another termination reference voltage module 1 of resistance R18, the output terminal of amplifier U3B, as an output terminal of pid control module 5, is designated as port Vd;
The structure of described adder Module 6 is: the port Vk of a termination pid control module 5 of resistance R20, the port Vint of the one termination pid control module 5 of resistance R21, the port Vd of the one termination pid control module 5 of resistance R22, the other end of resistance R20, the other end and the other end of resistance R22 of resistance R21 are connected together and are connected with one end of resistance R19 with the inverting input of amplifier U4A, the output terminal of another termination amplifier U4A of resistance R19, the port Vref of the one termination reference voltage module 1 of resistance R23, the in-phase input end of another termination amplifier U4A and one end of resistance R24, the other end ground connection of resistance R24, the positive supply termination power VCC of amplifier U4A, negative power end ground connection, the output terminal of amplifier U4A is as the output terminal of adder Module 6, be designated as port Vsum,
The structure of described current output module 7 is: the port Vsum of a termination adder Module 6 of resistance R25, the in-phase input end of another termination amplifier U5B, the port Vfd1 of one termination first feedback module 8 of resistance R26, the inverting input of another termination amplifier U5B, one end of resistance R27 and one end of electric capacity C4, another termination power VCC of resistance R27, the output terminal of another termination amplifier U5B of electric capacity C4, the grid of the output termination metal-oxide-semiconductor Q1 of amplifier U5B, the source electrode of metal-oxide-semiconductor Q1 meets power supply VCC, the drain electrode of metal-oxide-semiconductor Q1 connects one end of sample resistance Rref, and as an output terminal of current output module 7, be designated as port Vsam1, described metal-oxide-semiconductor Q1 is N channel enhancement metal-oxide-semiconductor, 1 pin of another termination two core interface Header2 of sample resistance Rref, and as another output terminal of current output module 7, be designated as port Vsam2, the 2 pin ground connection of two core interface Header2,
The structure of the first described feedback module 8 is: the port Vsam1 of a termination current output module 7 of resistance R29, the in-phase input end of another termination amplifier U4B and one end of resistance R28, the other end ground connection of resistance R28, the port Vsam2 of the one termination current output module 7 of resistance R30, the inverting input of another termination amplifier U4B and one end of resistance R31, the output terminal of another termination amplifier U4B of resistance R31, the output terminal of amplifier U4B, as the output terminal of the first feedback module 8, is designated as port Vfd1;
The structure of the second described feedback module 9 is: the in-phase input end of amplifier U6A meets the port Vsam1 of current output module 7, the positive supply termination power VCC of amplifier U6A, negative power end ground connection, the anti-phase input terminating resistor R32 of amplifier U6A, one end of resistance R33 and the sliding end of slide rheostat W6, the output terminal of another termination amplifier U6A of resistance R32, the output terminal of amplifier U6A is as the output terminal of the second feedback module 9, be designated as port Vfd2, the output terminal of another termination amplifier U6B of resistance R33 and one end of resistance R34, one end of the one terminating resistor R35 of slide rheostat W6, the other end and the other end of resistance R34 of resistance R35 are connected together and are connected with one end of resistance R36 with the inverting input of amplifier U6B, the other end ground connection of resistance R36, the in-phase input end of amplifier U6B meets the port Vsam2 of current output module 7,
The structure of described current limliting display module 10 is: a termination current limliting of slide rheostat W1 arranges the port Ilim of module 2, other end ground connection, one end of the sliding end connecting resistance R37 of slide rheostat W1, the in-phase input end of another termination amplifier U7A of resistance R37, one end of the anti-phase input terminating resistor R38 of amplifier U7A, the output terminal of another termination amplifier U7A of resistance R38, the positive supply termination power VCC of amplifier U7A, negative power end ground connection, one end of the port LED connecting resistance R39 of front panel 12 breaker in middle SW2, the other end ground connection of R39, the output terminal of amplifier U7A is as the output terminal of current limliting display module 10, be designated as port DSP1,
The structure of described output current display module 11 is: the in-phase input end of amplifier U8A meets the port Vsam1 of current output module 7, the positive supply termination power VCC of amplifier U8A, negative power end ground connection, the anti-phase input terminating resistor R40 of amplifier U8A, one end of resistance R41 and the sliding end of slide rheostat W2, the output terminal of another termination amplifier U8A of resistance R40, the output terminal of amplifier U8A is as the output terminal of output current display module 11, be designated as port DSP2, the output terminal of another termination amplifier U8B of resistance R41 and one end of resistance R43, one end of the one terminating resistor R42 of slide rheostat W2, the other end and the other end of resistance R43 of resistance R42 are connected together and are connected with one end of resistance R44 with the inverting input of amplifier U8B, the other end ground connection of resistance R44, the in-phase input end of amplifier U8B meets the port Vsam2 of current output module 7,
The structure of described front panel 12 comprises: electric current exports 120, power switch 121, display selection 122, digital watch 123, Limited Current 124, output current 125, current limliting arrange 126 and output arrange 127, described electric current exports the interface that 120 are a two-phase, just, negative respectively with 1 pin of two core interface Header2 in current output module 7, 2 pin are connected, described power switch 121 is battery main switches of whole device, described display selects 122 to be double-point double-throw switchs, two groups of linked switches that it comprises are designated as interrupteur SW 1 and interrupteur SW 2 respectively, the common port of interrupteur SW 1 is designated as port DSPin, connect the positive pole of the signal input part of digital watch 123, the minus earth of the signal input part of digital watch 123, two selecting sides of interrupteur SW 1 meet the port DSP1 of current limliting the display module 10 and port DSP2 of output current display module 11 respectively, the common port of interrupteur SW 2 is designated as port LED, select the negative pole of termination Limited Current 124 for one of interrupteur SW 2, this selecting side is corresponding with the selecting side that the port DSP1 of current limliting display module 10 is connected with interrupteur SW 1, the negative pole of another selection termination output current 125 of interrupteur SW 2, this selecting side is corresponding with the selecting side that the port DSP2 of output current display module 11 is connected with interrupteur SW 1, described Limited Current 124 and output current 125 are light emitting diode, their positive pole meets power supply VCC jointly, described digital watch 123 is digital voltmeters of one 4 half, described current limliting arranges 126 and export that to arrange 127 are knob slide rheostats that two resistances are 20k Ω, the 3 core interface Header31 arranged with current limliting respectively in module 2 are connected with the 3 core interface Header32 that electric current is arranged in module 3, the two ends that connected mode is slide rheostat respectively with 1 pin of each 3 core interfaces, 3 pin are connected, sliding end is connected with 2 pin.
Of the present invention a kind of as follows based on each element preferred parameter used in the degenerative constant-current source device of dicyclo: amplifier U1A, amplifier U1B ~ amplifier U6A, amplifier U6B, amplifier U7A, amplifier U8A and amplifier U8B are TLC2252; The voltage of voltage regulation of voltage stabilizing diode D1 is 2.5V; Slide rheostat W1 and slide rheostat W2 is 20k Ω, and slide rheostat W3 ~ slide rheostat W5 is 500k Ω, and slide rheostat W6 is 100k Ω; Resistance R1 and resistance R2 is 10k Ω, resistance R4 ~ resistance R18 is 10k Ω, resistance R25, resistance R26, resistance R29 and resistance R30 are 10k Ω, resistance R37 ~ resistance R39 is 10k Ω, resistance R19 ~ resistance R22 and resistance R24 is 15k Ω, resistance R3, resistance R32 ~ resistance R34, resistance R36, resistance R40, resistance R41, resistance R43 and resistance R44 are 100k Ω, resistance R28 and resistance R31 is 200k Ω, resistance R35 and resistance R42 is 1k Ω, resistance R27 is 1M Ω, resistance R23 is 5.1k Ω, and sample resistance Rref is 0.1 Ω; Electric capacity C1 is 4.7nF, and electric capacity C2 is 10pF, and electric capacity C3 is 100pF, and electric capacity C4 is 0.47uF; Metal-oxide-semiconductor Q1 is IRF530; Power supply VCC is 12V direct supply.
The present invention's one has following beneficial effect based on the degenerative constant-current source device of dicyclo:
1, the present invention adopts dicyclo negative feedback structure, effectively improves the degree of stability of output current.
2, the present invention adopts dicyclo negative feedback structure, improves the security of circuit, and when a feedback loop breaks down disconnection, circuit still can normally work.
3, the present invention is to arranging electric current and feedback current employing PID control treatment, makes circuit equal energy automatic steady current under a lot of use occasion.
4, the present invention comprises current limliting module, effectively can limit the maximal value of output current, makes can not exceed cut-off current when regulation output electric current, further increases the security of circuit.
5, the second feedback module of the present invention adopts double operational high input impedance formula subtracter to sample output current, more effectively can reduce the impact of feedback circuit on output current than traditional subtracter structure.
6, in the present invention electric current export 120 places connect the minus earth of load, can effective guarantee loaded work piece time security.
Accompanying drawing explanation
Fig. 1 is general structure block diagram of the present invention.
Fig. 2 is the schematic diagram of reference voltage module 1 of the present invention.
Fig. 3 is the schematic diagram that current limliting of the present invention arranges module 2.
Fig. 4 is the schematic diagram that electric current of the present invention arranges module 3.
Fig. 5 is the schematic diagram of subtracter block 4 of the present invention.
Fig. 6 is the schematic diagram of pid control module 5 of the present invention.
Fig. 7 is the schematic diagram of adder Module 6 of the present invention.
Fig. 8 is the schematic diagram of current output module 7 of the present invention.
Fig. 9 is the schematic diagram of the first feedback module 8 of the present invention.
Figure 10 is the schematic diagram of the second feedback module 9 of the present invention.
Figure 11 is the schematic diagram of current limliting display module 10 of the present invention.
Figure 12 is the schematic diagram of output current display module 11 of the present invention.
Figure 13 is the structural representation of front panel 12 of the present invention.
Figure 14 is structure and the connection diagram that the display on front panel 12 of the present invention selects 122.
Embodiment
Be described further principle of work of the present invention below by specific embodiment, in following embodiment, each element selected parameter is as follows:
Amplifier U1A, amplifier U1B ~ amplifier U6A, amplifier U6B, amplifier U7A, amplifier U8A and amplifier U8B are TLC2252; The voltage of voltage regulation of voltage stabilizing diode D1 is 2.5V; Slide rheostat W1 and slide rheostat W2 is 20k Ω, and slide rheostat W3 ~ slide rheostat W5 is 500k Ω, and slide rheostat W6 is 100k Ω; Resistance R1 and resistance R2 is 10k Ω, resistance R4 ~ resistance R18 is 10k Ω, resistance R25, resistance R26, resistance R29 and resistance R30 are 10k Ω, resistance R37 ~ resistance R39 is 10k Ω, resistance R19 ~ resistance R22 and resistance R24 is 15k Ω, resistance R3, resistance R32 ~ resistance R34, resistance R36, resistance R40, resistance R41, resistance R43 and resistance R44 are 100k Ω, resistance R28 and resistance R31 is 200k Ω, resistance R35 and resistance R42 is 1k Ω, resistance R27 is 1M Ω, resistance R23 is 5.1k Ω, and sample resistance Rref is 0.1 Ω; Electric capacity C1 is 4.7nF, and electric capacity C2 is 10pF, and electric capacity C3 is 100pF, and electric capacity C4 is 0.47uF; Metal-oxide-semiconductor Q1 is IRF530; Power supply VCC is 12V direct supply.
Embodiment 1 one-piece construction of the present invention
Composition graphs 1 illustrates a kind of overall work principle based on the degenerative constant-current source device of dicyclo of the present invention.Module 1 is set by current limliting a maximum controlling voltage is set, 127 are arranged by regulating the output in front panel 12, can make electric current that module 2 is set and export the control voltage of size between 0 to maximum controlling voltage, second feedback module 9 pairs output current samples and is converted to corresponding voltage, above-mentioned two voltages carry out asking poor in subtracter block 4, difference is delivered in PID module 5 and is carried out PID process, three voltage signals of gained deliver to the control input end of current output module 7 after adder Module 6 is added as driving voltage, compare with the feedback voltage of the first feedback module 8, comparative result controls the output current of current output module 7, reference voltage module 1 is used for as subtracter block 4, pid control module 5 and adder Module 6 provide necessary reference voltage, because whole system is in dual negative feedback duty, therefore, the control voltage that the large young pathbreaker that in front panel 12, electric current exports 120 place's output currents arranges module 2 setting in strict accordance with electric current changes.
Embodiment 2 reference voltage module 1 of the present invention
The schematic circuit of reference voltage module 1 of the present invention as shown in Figure 2, the one termination power VCC of resistance R1, the in-phase input end of another termination amplifier U5A and one end of resistance R2, the other end ground connection of resistance R2, one end of the anti-phase input terminating resistor R3 of amplifier U5A, the output terminal of another termination amplifier U5A of resistance R3, the positive supply termination power VCC of amplifier U5A, negative power end ground connection, the output terminal of the output terminal of amplifier U5A module 1 as the reference voltage, is designated as port Vref.
Resistance R1 and R2 carries out dividing potential drop to 12V supply voltage, because two resistances are equal, so branch pressure voltage is 6V, this voltage, through obtaining the 6V reference voltage with stronger driving force at output terminal after the voltage follower that amplifier U5A is formed, provides reference voltage for giving subtracter block 4, pid control module 5 and adder Module 6.
Embodiment 3 current limliting of the present invention arranges module 2
Current limliting of the present invention arranges the schematic circuit of module 2 as shown in Figure 3, the one termination power VCC of resistance R4,1 pin of another termination 3 core interface Header31 and the negative pole of voltage stabilizing diode D1,3 pin of 3 core interface Header31 and the plus earth of voltage stabilizing diode D1,2 pin of 3 core interface Header31 connect the in-phase input end of amplifier U1A, the output terminal of the anti-phase input termination amplifier U1A of amplifier U1A, the positive supply termination power VCC of amplifier U1A, negative power end ground connection, the output terminal of amplifier U1A arranges the output terminal of module 2 as current limliting, be designated as port Ilim.
Voltage stabilizing diode D1 provides the reference voltage of 2.5V, the current limliting that its two ends are added in front panel by 1,3 pin of 3 core interface Header31 arranges 126 two ends, it is knob slide rheostats that current limliting arranges 126, the in-phase input end of its slip termination amplifier U1A, sliding end voltage will change within the scope of 0V ~ 2.5V, and this magnitude of voltage obtains the stronger limit voltage of driving force at output terminal after the voltage follower that amplifier U1A is formed.
Embodiment 4 electric current of the present invention arranges module 3
Electric current of the present invention arranges the schematic circuit of module 3 as shown in Figure 4,1 pin of 3 core interface Header32 meets the port Ilim that current limliting arranges module 2, the 3 pin ground connection of 3 core interface Header32, one end of the 2 pin connecting resistance R5 of 3 core interface Header32, the in-phase input end of another termination amplifier U1B of resistance R5, the anti-phase input terminating resistor R6 of amplifier U1B and one end of resistance R7, the other end ground connection of resistance R6, the output terminal of another termination amplifier U1B of resistance R7, the output terminal of amplifier U1B arranges the output terminal of module 3 as electric current, be designated as port Iset.
Between 1,3 pin of 3 core interface Header32, voltage equals the limit voltage that current limliting arranges module 2 output, and the output that 1,3 pin of 3 core interface Header32 are added in front panel arranges 127 two ends, it is knob slide rheostats that output arranges 127,2 pin of its slip termination 3 core interface Header32, be connected with one end of resistance R5, sliding end voltage will change within the scope of 0V ~ limit voltage, and this magnitude of voltage outputs to subtracter block 4 after the in-phase proportion amplifier that amplifier U1B is formed amplifies 2 times.
Embodiment 5 subtracter block 4
The schematic circuit of subtracter block 4 of the present invention as shown in Figure 5, the one termination electric current of resistance R9 arranges the port Iset of module 3, the in-phase input end of another termination amplifier U2A and one end of resistance R8, the port Vref of another termination reference voltage module 1 of resistance R8, the port Vfd2 of one termination second feedback module 9 of resistance R10, one end of another termination amplifier U2A inverting input and resistance R11, the output terminal of another termination amplifier U2A of resistance R11, the positive supply termination power VCC of amplifier U2A, negative power end ground connection, the output terminal of amplifier U2A is as the output terminal of subtracter block 4, be designated as port Vdiff.
This subtracter block is the subtracter that 1:1 doubly exports, and the size of output voltage is the difference that the voltage of port Vref adds the voltage of upper port Iset and port Vfd2.
Embodiment 6PID control module 5
The schematic circuit of pid control module 5 of the present invention as shown in Figure 6, the port Vdiff of the one termination subtracter block 4 of resistance R13, the inverting input of another termination amplifier U2B and one end of resistance R12, one end of another termination slide rheostat W3 of resistance R12, the output terminal of the slip termination amplifier U2B of slide rheostat W3, one end of the in-phase input end connecting resistance R16 of amplifier U2B, the port Vref of another termination reference voltage module 1 of resistance R16, the output terminal of amplifier U2B, as an output terminal of pid control module 5, is designated as port Vk; The port Vdiff of the one termination subtracter block 4 of resistance R14, one end of another termination slide rheostat W4, the inverting input of slip termination amplifier U3A of slide rheostat W4 and one end of electric capacity C1, the output terminal of another termination amplifier U3A of electric capacity C1, one end of the in-phase input end connecting resistance R17 of amplifier U3A, the port Vref of another termination reference voltage module 1 of resistance R17, the positive supply termination power VCC of amplifier U3A, negative power end ground connection, the output terminal of amplifier U3A, as an output terminal of pid control module 5, is designated as port Vint; The port Vdiff of the one termination subtracter block 4 of electric capacity C3, one end of the inverting input of another termination amplifier U3B, one end of electric capacity C2 and resistance R15, the output terminal of another termination amplifier U3B of electric capacity C2, one end of another termination slide rheostat W5 of resistance R15, the output terminal of the slip termination amplifier U3B of slide rheostat W5, one end of the in-phase input end connecting resistance R18 of amplifier U3B, the port Vref of another termination reference voltage module 1 of resistance R18, the output terminal of amplifier U3B, as an output terminal of pid control module 5, is designated as port Vd.
The difference voltage that subtracter block 4 exports by this circuit carries out ratio, integration, differentiate after output to adder Module 6 again.
Embodiment 7 adder Module 6
The schematic circuit of adder Module 6 of the present invention as shown in Figure 7, the port Vk of the one termination pid control module 5 of resistance R20, the port Vint of the one termination pid control module 5 of resistance R21, the port Vd of the one termination pid control module 5 of resistance R22, the other end of resistance R20, the other end and the other end of resistance R22 of resistance R21 are connected together and are connected with one end of resistance R19 with the inverting input of amplifier U4A, the output terminal of another termination amplifier U4A of resistance R19, the port Vref of the one termination reference voltage module 1 of resistance R23, the in-phase input end of another termination amplifier U4A and one end of resistance R24, the other end ground connection of resistance R24, the positive supply termination power VCC of amplifier U4A, negative power end ground connection, the output terminal of amplifier U4A is as the output terminal of adder Module 6, be designated as port Vsum.
The differential voltage of the ratio-voltage of pid control module 5 output port Vk, the integral voltage of port Vint and port Vd is added by this circuit, and outputs to current output module 7 again after the 6V reference voltage of cancellation port Vref.
Embodiment 8 current output module 7
The schematic diagram of current output module 7 of the present invention as shown in Figure 8, the port Vsum of the one termination adder Module 6 of resistance R25, the in-phase input end of another termination amplifier U5B, the port Vfd1 of one termination first feedback module 8 of resistance R26, the inverting input of another termination amplifier U5B, one end of resistance R27 and one end of electric capacity C4, another termination power VCC of resistance R27, the output terminal of another termination amplifier U5B of electric capacity C4, the grid of the output termination metal-oxide-semiconductor Q1 of amplifier U5B, the source electrode of metal-oxide-semiconductor Q1 meets power supply VCC, the drain electrode of metal-oxide-semiconductor Q1 connects one end of sample resistance Rref, and as an output terminal of current output module 7, be designated as port Vsam1, described metal-oxide-semiconductor Q1 is N channel enhancement metal-oxide-semiconductor, 1 pin of another termination two core interface Header2 of sample resistance Rref, and as another output terminal of current output module 7, be designated as port Vsam2, the 2 pin ground connection of two core interface Header2.
This circuit utilizes the opening degree of the difference voltage control N channel enhancement metal-oxide-semiconductor Q1 of port Vsum and port Vfd1, determines the size of output current thus.
Embodiment 9 first feedback module 8
First feedback module 8 of the present invention as shown in Figure 9, the port Vsam1 of the one termination current output module 7 of resistance R29, the in-phase input end of another termination amplifier U4B and one end of resistance R28, the other end ground connection of resistance R28, the port Vsam2 of the one termination current output module 7 of resistance R30, the inverting input of another termination amplifier U4B and one end of resistance R31, the output terminal of another termination amplifier U4B of resistance R31, the output terminal of amplifier U4B, as the output terminal of the first feedback module 8, is designated as port Vfd1.
This module will deliver to the feedback input end of current output module 7 after the voltage amplification 20 times at the sample resistance Rref two ends in current output module 7, the voltage of the port Vsum received with the control input end of current output module 7 compares, during balance, both voltage is equal, current output module 7 exports to the enlargement factor of voltage divided by subtracter in the first feedback module 8 that the size of current being connected on load on two core interface Header2 is constantly equal to port Vsum, thus realizes the function of Control of Voltage constant current output.
Embodiment 10 second feedback module 9
The schematic diagram of the second feedback module 9 of the present invention as shown in Figure 10, the in-phase input end of amplifier U6A meets the port Vsam1 of current output module 7, the positive supply termination power VCC of amplifier U6A, negative power end ground connection, the anti-phase input terminating resistor R32 of amplifier U6A, one end of resistance R33 and the sliding end of slide rheostat W6, the output terminal of another termination amplifier U6A of resistance R32, the output terminal of amplifier U6A is as the output terminal of the second feedback module 9, be designated as port Vfd2, the output terminal of another termination amplifier U6B of resistance R33 and one end of resistance R34, one end of the one terminating resistor R35 of slide rheostat W6, the other end and the other end of resistance R34 of resistance R35 are connected together and are connected with one end of resistance R36 with the inverting input of amplifier U6B, the other end ground connection of resistance R36, the in-phase input end of amplifier U6B meets the port Vsam2 of current output module 7.
This module, by adjustment slide rheostat W6, delivers to subtracter block 4 by after the voltage amplification 20 times at the sample resistance Rref two ends in current output module 7, and the voltage arranging module 3 provide with electric current carries out asking poor in subtracter.
Embodiment 11 current limliting display module 10
The schematic diagram of current limliting display module 10 of the present invention as shown in figure 11, the one termination current limliting of slide rheostat W1 arranges the port Ilim of module 2, other end ground connection, one end of the sliding end connecting resistance R37 of slide rheostat W1, the in-phase input end of another termination amplifier U7A of resistance R37, one end of the anti-phase input terminating resistor R38 of amplifier U7A, the output terminal of another termination amplifier U7A of resistance R38, the positive supply termination power VCC of amplifier U7A, negative power end ground connection, one end of the port LED connecting resistance R39 of front panel 12 breaker in middle SW2, the other end ground connection of R39, the output terminal of amplifier U7A is as the output terminal of current limliting display module 10, be designated as port DSP1.
After current limliting is arranged the voltage signal decay that module 2 exports by this module, the digital watch 123 sent in front panel 12 shows, and by adjustment slide rheostat W1, the magnitude of voltage after decay can be made to equal the size of current Limited Current value.Thus allow digital watch 123 show current Limited Current.
Embodiment 12 output current display module 11
The schematic diagram of output current display module 11 of the present invention as shown in figure 12, the in-phase input end of amplifier U8A meets the port Vsam1 of current output module 7, the positive supply termination power VCC of amplifier U8A, negative power end ground connection, the anti-phase input terminating resistor R40 of amplifier U8A, one end of resistance R41 and the sliding end of slide rheostat W2, the output terminal of another termination amplifier U8A of resistance R40, the output terminal of amplifier U8A is as the output terminal of output current display module 11, be designated as port DSP2, the output terminal of another termination amplifier U8B of resistance R41 and one end of resistance R43, one end of the one terminating resistor R42 of slide rheostat W2, the other end and the other end of resistance R43 of resistance R42 are connected together and are connected with one end of resistance R44 with the inverting input of amplifier U8B, the other end ground connection of resistance R44, the in-phase input end of amplifier U8B meets the port Vsam2 of current output module 7.
The digital watch 123 sent in front panel 12 after the voltage amplification at the sample resistance Rref two ends in current output module 7 shows by this module, by adjustment slide rheostat W2, the magnitude of voltage after amplification can be made to equal the size of current actual output current value.Thus allow digital watch 123 show current actual output current.
Embodiment 13 front panel 12
As shown in figure 13, structure comprises front panel 12 of the present invention: electric current exports 120, power switch 121, display selection 122, digital watch 123, Limited Current 124, output current 125, current limliting arrange 126 and output arrange 127, described electric current exports the interface that 120 are a two-phase, just, negative respectively with 1 pin of two core interface Header2 in current output module 7, 2 pin are connected, electric current exports the load that 120 connect whole device in based on the degenerative constant-current source device of dicyclo, described power switch 121 is battery main switches of whole device, described display selects 122 to be double-point double-throw switchs, its structure is see Figure 14, two groups of linked switches that it comprises are designated as interrupteur SW 1 and interrupteur SW 2 respectively, the common port of interrupteur SW 1 is designated as port DSPin, connect the positive pole of the signal input part of digital watch 123, the minus earth of the signal input part of digital watch 123, two selecting sides of interrupteur SW 1 meet the port DSP1 of current limliting the display module 10 and port DSP2 of output current display module 11 respectively, described digital watch 123 is digital voltmeters of one 4 half, display selection 122 can select the parameter that will show by interrupteur SW 1, the common port of interrupteur SW 2 is designated as port LED, select the negative pole of termination Limited Current 124 for one of interrupteur SW 2, this selecting side is corresponding with the selecting side that the port DSP1 of current limliting display module 10 is connected with interrupteur SW 1, the negative pole of another selection termination output current 125 of interrupteur SW 2, this selecting side is corresponding with the selecting side that the port DSP2 of output current display module 11 is connected with interrupteur SW 1, described Limited Current 124 and output current 125 are light emitting diode, their positive pole meets power supply VCC jointly, when the parameter that will show is selected in display selection 122 by interrupteur SW 1, correspondingly the pilot lamp of correspondence (light emitting diode) can be communicated with by interrupteur SW 2, corresponding pilot lamp will light, described current limliting arranges 126 and export that to arrange 127 are knob slide rheostats that two resistances are 20k Ω, the 3 core interface Header31 arranged with current limliting respectively in module 2 are connected with the 3 core interface Header32 that electric current is arranged in module 3, the two ends that connected mode is slide rheostat respectively with 1 pin of each 3 core interfaces, 3 pin are connected, sliding end is connected with 2 pin, when regulating corresponding knob, by the output voltage of the sliding end of change two slide rheostats, thus the setting realized Limited Current and output current.
Claims (2)
1., based on the degenerative constant-current source device of dicyclo, limited configurations stream arranges module (2), electric current arranges module (3), current output module (7) and the first feedback module (8), it is characterized in that, structure also has reference voltage module (1), subtracter block (4), pid control module (5), adder Module (6), the second feedback module (9), current limliting display module (10), output current display module (11) and front panel (12), the output that current limliting arranges module (2) is connected with the input that electric current arranges module (3), the output that electric current arranges module (3) connects the control inputs of subtracter block (4), the output of the second feedback module (9) connects the feed back input of subtracter block (4), the output of subtracter block (4) connects the input of pid control module (5), the output of pid control module (5) connects the input of adder Module (6), the output of reference voltage module (1) connects subtracter block (4) respectively, the reference voltage input of pid control module (5) and adder Module (6), the output of adder Module (6) connects the control inputs of current output module (7), the output of the first feedback module (8) connects the feed back input of current output module (7), the output of current output module (7) connects the first feedback module (8), the input of the second feedback module (9) and output current display module (11), the output of output current display module (11) connects a selecting side of front panel (12) breaker in middle SW1, the output that current limliting arranges module (2) also connects the input of current limliting display module (10), and the output of current limliting display module connects another selecting side of front panel (12) breaker in middle SW1, the electric current that two core interface Header2 of current output module (7) connect on front panel (12) exports (120),
The structure of described reference voltage module (1) is: a termination power VCC of resistance R1, the in-phase input end of another termination amplifier U5A and one end of resistance R2, the other end ground connection of resistance R2, one end of the anti-phase input terminating resistor R3 of amplifier U5A, the output terminal of another termination amplifier U5A of resistance R3, the positive supply termination power VCC of amplifier U5A, negative power end ground connection, the output terminal of the output terminal of amplifier U5A module (1) as the reference voltage, is designated as port Vref;
The structure that described current limliting arranges module (2) is: a termination power VCC of resistance R4,1 pin of another termination 3 core interface Header31 and the negative pole of voltage stabilizing diode D1,3 pin of 3 core interface Header31 and the plus earth of voltage stabilizing diode D1,2 pin of 3 core interface Header31 connect the in-phase input end of amplifier U1A, the output terminal of the anti-phase input termination amplifier U1A of amplifier U1A, the positive supply termination power VCC of amplifier U1A, negative power end ground connection, the output terminal of amplifier U1A arranges the output terminal of module (2) as current limliting, be designated as port Ilim;
The structure that described electric current arranges module (3) is: 1 pin of 3 core interface Header32 meets the port Ilim that current limliting arranges module (2), the 3 pin ground connection of 3 core interface Header32, one end of the 2 pin connecting resistance R5 of 3 core interface Header32, the in-phase input end of another termination amplifier U1B of resistance R5, the anti-phase input terminating resistor R6 of amplifier U1B and one end of resistance R7, the other end ground connection of resistance R6, the output terminal of another termination amplifier U1B of resistance R7, the output terminal of amplifier U1B arranges the output terminal of module (3) as electric current, be designated as port Iset;
The structure of described subtracter block (4) is: a termination electric current of resistance R9 arranges the port Iset of module (3), the in-phase input end of another termination amplifier U2A and one end of resistance R8, the port Vref of another termination reference voltage module (1) of resistance R8, the port Vfd2 of one termination second feedback module (9) of resistance R10, one end of another termination amplifier U2A inverting input and resistance R11, the output terminal of another termination amplifier U2A of resistance R11, the positive supply termination power VCC of amplifier U2A, negative power end ground connection, the output terminal of amplifier U2A is as the output terminal of subtracter block (4), be designated as port Vdiff,
The structure of described pid control module (5) is: the port Vdiff of a termination subtracter block (4) of resistance R13, the inverting input of another termination amplifier U2B and one end of resistance R12, one end of another termination slide rheostat W3 of resistance R12, the output terminal of the slip termination amplifier U2B of slide rheostat W3, one end of the in-phase input end connecting resistance R16 of amplifier U2B, the port Vref of another termination reference voltage module (1) of resistance R16, the output terminal of amplifier U2B, as an output terminal of pid control module (5), is designated as port Vk, the port Vdiff of the one termination subtracter block (4) of resistance R14, one end of another termination slide rheostat W4, the inverting input of slip termination amplifier U3A of slide rheostat W4 and one end of electric capacity C1, the output terminal of another termination amplifier U3A of electric capacity C1, one end of the in-phase input end connecting resistance R17 of amplifier U3A, the port Vref of another termination reference voltage module (1) of resistance R17, the positive supply termination power VCC of amplifier U3A, negative power end ground connection, the output terminal of amplifier U3A is as an output terminal of pid control module (5), be designated as port Vint, the port Vdiff of the one termination subtracter block (4) of electric capacity C3, the inverting input of another termination amplifier U3B, one end of electric capacity C2 and one end of resistance R15, the output terminal of another termination amplifier U3B of electric capacity C2, one end of another termination slide rheostat W5 of resistance R15, the output terminal of the slip termination amplifier U3B of slide rheostat W5, one end of the in-phase input end connecting resistance R18 of amplifier U3B, the port Vref of another termination reference voltage module (1) of resistance R18, the output terminal of amplifier U3B is as an output terminal of pid control module (5), be designated as port Vd,
The structure of described adder Module (6) is: the port Vk of a termination pid control module (5) of resistance R20, the port Vint of the one termination pid control module (5) of resistance R21, the port Vd of the one termination pid control module (5) of resistance R22, the other end of resistance R20, the other end and the other end of resistance R22 of resistance R21 are connected together and are connected with one end of resistance R19 with the inverting input of amplifier U4A, the output terminal of another termination amplifier U4A of resistance R19, the port Vref of the one termination reference voltage module (1) of resistance R23, the in-phase input end of another termination amplifier U4A and one end of resistance R24, the other end ground connection of resistance R24, the positive supply termination power VCC of amplifier U4A, negative power end ground connection, the output terminal of amplifier U4A is as the output terminal of adder Module (6), be designated as port Vsum,
The structure of described current output module (7) is: the port Vsum of a termination adder Module (6) of resistance R25, the in-phase input end of another termination amplifier U5B, the port Vfd1 of one termination first feedback module (8) of resistance R26, the inverting input of another termination amplifier U5B, one end of resistance R27 and one end of electric capacity C4, another termination power VCC of resistance R27, the output terminal of another termination amplifier U5B of electric capacity C4, the grid of the output termination metal-oxide-semiconductor Q1 of amplifier U5B, the source electrode of metal-oxide-semiconductor Q1 meets power supply VCC, the drain electrode of metal-oxide-semiconductor Q1 connects one end of sample resistance Rref, and as an output terminal of current output module (7), be designated as port Vsam1, described metal-oxide-semiconductor Q1 is N channel enhancement metal-oxide-semiconductor, 1 pin of another termination two core interface Header2 of sample resistance Rref, and as another output terminal of current output module (7), be designated as port Vsam2, the 2 pin ground connection of two core interface Header2,
The structure of described the first feedback module (8) is: the port Vsam1 of a termination current output module (7) of resistance R29, the in-phase input end of another termination amplifier U4B and one end of resistance R28, the other end ground connection of resistance R28, the port Vsam2 of the one termination current output module (7) of resistance R30, the inverting input of another termination amplifier U4B and one end of resistance R31, the output terminal of another termination amplifier U4B of resistance R31, the output terminal of amplifier U4B, as the output terminal of the first feedback module (8), is designated as port Vfd1;
The structure of described the second feedback module (9) is: the in-phase input end of amplifier U6A meets the port Vsam1 of current output module (7), the positive supply termination power VCC of amplifier U6A, negative power end ground connection, the anti-phase input terminating resistor R32 of amplifier U6A, one end of resistance R33 and the sliding end of slide rheostat W6, the output terminal of another termination amplifier U6A of resistance R32, the output terminal of amplifier U6A is as the output terminal of the second feedback module (9), be designated as port Vfd2, the output terminal of another termination amplifier U6B of resistance R33 and one end of resistance R34, one end of the one terminating resistor R35 of slide rheostat W6, the other end and the other end of resistance R34 of resistance R35 are connected together and are connected with one end of resistance R36 with the inverting input of amplifier U6B, the other end ground connection of resistance R36, the in-phase input end of amplifier U6B meets the port Vsam2 of current output module (7),
The structure of described current limliting display module (10) is: a termination current limliting of slide rheostat W1 arranges the port Ilim of module (2), other end ground connection, one end of the sliding end connecting resistance R37 of slide rheostat W1, the in-phase input end of another termination amplifier U7A of resistance R37, one end of the anti-phase input terminating resistor R38 of amplifier U7A, the output terminal of another termination amplifier U7A of resistance R38, the positive supply termination power VCC of amplifier U7A, negative power end ground connection, one end of the port LED connecting resistance R39 of front panel (12) breaker in middle SW2, the other end ground connection of R39, the output terminal of amplifier U7A is as the output terminal of current limliting display module (10), be designated as port DSP1,
The structure of described output current display module (11) is: the in-phase input end of amplifier U8A meets the port Vsam1 of current output module (7), the positive supply termination power VCC of amplifier U8A, negative power end ground connection, the anti-phase input terminating resistor R40 of amplifier U8A, one end of resistance R41 and the sliding end of slide rheostat W2, the output terminal of another termination amplifier U8A of resistance R40, the output terminal of amplifier U8A is as the output terminal of output current display module (11), be designated as port DSP2, the output terminal of another termination amplifier U8B of resistance R41 and one end of resistance R43, one end of the one terminating resistor R42 of slide rheostat W2, the other end and the other end of resistance R43 of resistance R42 are connected together and are connected with one end of resistance R44 with the inverting input of amplifier U8B, the other end ground connection of resistance R44, the in-phase input end of amplifier U8B meets the port Vsam2 of current output module (7),
The structure of described front panel (12) comprising: electric current exports (120), power switch (121), (122), digital watch (123) are selected in display, Limited Current (124), output current (125), current limliting arrange (126) and export and arrange (127), described electric current exports the interface that (120) are two-phases, just, negative respectively with 1 pin of two core interface Header2 in current output module (7), 2 pin are connected, described power switch (121) is the battery main switch of whole device, described display selects (122) to be a double-point double-throw switch, two groups of linked switches that it comprises are designated as interrupteur SW 1 and interrupteur SW 2 respectively, the common port of interrupteur SW 1 is designated as port DSPin, connect the positive pole of the signal input part of digital watch (123), the minus earth of the signal input part of digital watch (123), two selecting sides of interrupteur SW 1 meet the port DSP1 of current limliting display module (10) and the port DSP2 of output current display module (11) respectively, the common port of interrupteur SW 2 is designated as port LED, select the negative pole of termination Limited Current (124) for one of interrupteur SW 2, this selecting side is corresponding with the selecting side that the port DSP1 of current limliting display module (10) is connected with interrupteur SW 1, the negative pole of another selection termination output current (125) of interrupteur SW 2, this selecting side is corresponding with the selecting side that the port DSP2 of output current display module (11) is connected with interrupteur SW 1, described Limited Current (124) and output current (125) are light emitting diode, their positive pole meets power supply VCC jointly, described digital watch (123) is the digital voltmeter of 4 half, described current limliting arranges (126) and exports setting (127) is the knob slide rheostat that two resistances are 20k Ω, the 3 core interface Header31 arranged with current limliting respectively in module (2) are connected with the 3 core interface Header32 that electric current is arranged in module (3), the two ends that connected mode is slide rheostat respectively with 1 pin of each 3 core interfaces, 3 pin are connected, sliding end is connected with 2 pin.
2. one according to claim 1 is based on the degenerative constant-current source device of dicyclo, it is characterized in that, component parameters used in each module is: amplifier U1A, amplifier U1B ~ amplifier U6A, amplifier U6B, amplifier U7A, amplifier U8A and amplifier U8B are TLC2252; The voltage of voltage regulation of voltage stabilizing diode D1 is 2.5V; Slide rheostat W1 and slide rheostat W2 is 20k Ω, and slide rheostat W3 ~ slide rheostat W5 is 500k Ω, and slide rheostat W6 is 100k Ω; Resistance R1 and resistance R2 is 10k Ω, resistance R4 ~ resistance R18 is 10k Ω, resistance R25, resistance R26, resistance R29 and resistance R30 are 10k Ω, resistance R37 ~ resistance R39 is 10k Ω, resistance R19 ~ resistance R22 and resistance R24 is 15k Ω, resistance R3, resistance R32 ~ resistance R34, resistance R36, resistance R40, resistance R41, resistance R43 and resistance R44 are 100k Ω, resistance R28 and resistance R31 is 200k Ω, resistance R35 and resistance R42 is 1k Ω, resistance R27 is 1M Ω, resistance R23 is 5.1k Ω, and sample resistance Rref is 0.1 Ω; Electric capacity C1 is 4.7nF, and electric capacity C2 is 10pF, and electric capacity C3 is 100pF, and electric capacity C4 is 0.47uF; Metal-oxide-semiconductor Q1 is IRF530; Power supply VCC is 12V direct supply.
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| CN109039466A (en) * | 2018-08-07 | 2018-12-18 | 吉林大学 | A kind of high stability soliton generator based on erbium doped fiber laser |
| CN109683649A (en) * | 2018-12-22 | 2019-04-26 | 中国科学院宁波材料技术与工程研究所 | A kind of constant-current circuit |
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