CN209028496U - A kind of positive and negative adjustable millivolt level voltage generation circuit - Google Patents
A kind of positive and negative adjustable millivolt level voltage generation circuit Download PDFInfo
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- 230000009286 beneficial effect Effects 0.000 description 2
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Abstract
The utility model belongs to the technical field of voltage generation circuit, more particularly to a kind of positive and negative adjustable millivolt level voltage generation circuit, including sequentially connected main power source, isolation module, voltage regulating module, voltage control module and operational amplifying module, the voltage control module includes resistance trimming circuit and the reference circuit with the resistance trimming circuit in parallel, the both ends of the resistance trimming circuit are in parallel with the voltage regulating module, and the operational amplifying module is separately connected the resistance trimming circuit and the reference circuit.The utility model is by adjusting rheostatic resistance value, positive and negative adjustable millivolt step voltage or volt step voltage can be exported, and by changing corresponding rheostat, the range and precision of adjustable output voltage, keep the applicable surface of circuit more extensive, to reduce the cost of voltage generation circuit.
Description
Technical field
The utility model belongs to the technical field of voltage generation circuit, and in particular to a kind of positive and negative adjustable millivolt step voltage
Generation circuit.
Background technique
As electric system and measuring system develop to more small voltage, more low current, user is to electric system and measurement
System proposes higher precision demand.Since user constantly promotes required precision, so that market threshold is also continuously improved, promote phase
It closes unit and continues to increase investment.The especially output of millivolt step voltage, that there is output voltage waves is poor for general instrument, has prominent
Become, distortion or sluggish, is not able to satisfy the demand of all kinds of electric system.
Wherein, Chinese patent literature discloses a kind of exchange millivolt level voltage generation circuit (publication number: CN 204166018
U), AC voltage adjusting module input connection AC power source, output end connection isolation Voltage stabilizing module input terminal, isolation Voltage stabilizing module are defeated
Outlet connects small voltage and converts generation module input terminal, and small voltage conversion generation module output end connection loads and exports millivolt
Step voltage, measurement display module are separately connected AC voltage adjusting module output end and small voltage conversion generation module output end and survey
Amount display voltage value, voltage control module input terminal connection measurement display module, output end connect AC voltage adjusting module control terminal.
Above-mentioned scheme can generate a millivolt step voltage to a certain extent, but at least there is also following defects for this scheme: first, knot
Structure it is complicated and not easy to install and maintenance, second, millivolt step voltage it is positive and negative non-adjustable；Third, millivolt level voltage driving capability is not
Sufficient, there are large errors after access circuit.
Utility model content
The purpose of this utility model is that: in view of the deficiencies of the prior art, provide a kind of positive and negative adjustable millivolt step voltage
Generation circuit can export positive and negative adjustable millivolt step voltage or volt step voltage by adjusting rheostatic resistance value, and pass through
Change corresponding rheostat, the range and precision of adjustable output voltage keep the applicable surface of circuit more extensive, to reduce
The cost of voltage generation circuit.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of positive and negative adjustable millivolt level voltage generation circuit, including sequentially connected main power source, isolation module, pressure regulation mould
Block, voltage control module and operational amplifying module, the voltage control module include resistance trimming circuit and with the resistance trimming circuit simultaneously
The both ends of the reference circuit of connection, the resistance trimming circuit are in parallel with the voltage regulating module, and the operational amplifying module is separately connected institute
State resistance trimming circuit and the reference circuit.Isolation module can export stable isolation voltage, prevent the spread of voltage of main power source
And other modules are influenced, guarantee that each module works independently, without interruption；Voltage regulating module, for turning stable isolation voltage
Predeterminated voltage is turned to, the stability of voltage is helped to improve, prevents voltage from shaking；Since resistance trimming circuit has adjustable electric
Resistance, user make resistance trimming circuit output adjustable voltage by changing adjustable resistance；Since the resistance of reference circuit is relatively fixed, institute
It is basically unchanged with the reference voltage of output；Since the voltage difference of adjustable voltage and reference voltage is the voltage or volt grade of millivolt level
Voltage can improve the voltage of millivolt level after adjustable voltage and reference voltage are carried out operation amplifier processing by operational amplifying module
Stability reduces the error of voltage generation circuit.
As a kind of improvement of the positive and negative adjustable millivolt level voltage generation circuit of one kind described in the utility model, the tune
Resistance circuit includes first resistor, slide rheostat and second resistance, the output end electricity of the first resistor and the voltage regulating module
Connection, the binding post at the slide rheostat both ends are separately connected the first resistor and the second resistance, and the sliding becomes
The slider end of resistance device is electrically connected with the input terminal of the operational amplifying module, the ground connection of the second resistance and the voltage regulating module
End electrical connection.Since the both ends binding post of slide rheostat is separately connected first resistor and second resistance, when first resistor and
The resistance value of two resistance is equal, when slider end is located at slide rheostat center, is transported to the voltage of operational amplifying module, i.e. adjustable electric
Pressure, so slider end moves back and forth, can change the electricity for being transported to operational amplifying module equal to the 1/2 of voltage regulating module output voltage
Pressure.
As a kind of improvement of the positive and negative adjustable millivolt level voltage generation circuit of one kind described in the utility model, the base
Quasi- circuit includes the 3rd resistor being sequentially connected in series and the 4th resistance, and the 3rd resistor and the output end of the voltage regulating module are electrically connected
It connects, voltage reference points is provided between the 3rd resistor and the 4th resistance, the voltage reference points are put with the operation
The input terminal electrical connection of big module, the 4th resistance are electrically connected with the ground terminal of the voltage regulating module.When 3rd resistor and
When the resistance value of four resistance is equal, it is transported to the voltage of operational amplifying module, i.e. reference voltage, constant is voltage regulating module output voltage
1/2.
As a kind of improvement of the positive and negative adjustable millivolt level voltage generation circuit of one kind described in the utility model, the fortune
Calculating amplification module includes first via amplifier and No. second amplifier, and the first via amplifier is provided with the first input in the same direction
End, the first reverse input end and the first output end being electrically connected with first reverse input end, first noninverting input
It is electrically connected with the slider end, No. second amplifier is provided with the second noninverting input, the second reverse input end and second
Output end, second noninverting input are electrically connected with the voltage reference points, second reverse input end and described second
Output end electrical connection.Operational amplifying module uses the design of two-way amplifier, has high gain, common-mode rejection ratio height, common mode model
Width, simple compensation, the operation is stable are enclosed, the advantages that temperature stability is good between two amplifiers.
As a kind of improvement of the positive and negative adjustable millivolt level voltage generation circuit of one kind described in the utility model, the master
The anode of power supply is electrically connected by unilateral diode with the input terminal of the isolation module, the cathode of the main power source with it is described every
Ground terminal electrical connection from module.Unilateral diode only allows electric current to be flowed through by single direction, helps to improve the stabilization of voltage
Property.
As a kind of improvement of the positive and negative adjustable millivolt level voltage generation circuit of one kind described in the utility model, the tune
The input terminal and ground terminal of die block are connected with the filter capacitor of multiple parallel connections, and the output and ground of the voltage regulating module connects
It is connected to the filter capacitor of multiple parallel connections.Filter capacitor keeps the direct current of output smoother, and improves filtered electrical using parallel way
The working effect of appearance.
As a kind of improvement of the positive and negative adjustable millivolt level voltage generation circuit of one kind described in the utility model, it is described every
It is electrically connected from the output end of module with the power input of the operational amplifying module.Since the output voltage of isolation module is opposite
It is more stable, and be isolated with main power source, so voltage isolation module gives operational amplifying module power supply, prevent operational amplifying module by
Main power source influences.
The beneficial effects of the utility model are that the utility model includes sequentially connected main power source, isolation module, pressure regulation
Module, voltage control module and operational amplifying module, the voltage control module include resistance trimming circuit and with the resistance trimming circuit
Reference circuit in parallel, the both ends of the resistance trimming circuit are in parallel with the voltage regulating module, and the operational amplifying module is separately connected
The resistance trimming circuit and the reference circuit.Isolation module can export stable isolation voltage, prevent the voltage instability of main power source
Determine and influence other modules, guarantees that each module works independently, without interruption；Voltage regulating module, for by stable isolation voltage
It is converted into predeterminated voltage, the stability of voltage is helped to improve, prevents voltage from shaking；Since resistance trimming circuit has adjustable electric
Resistance, user make resistance trimming circuit output adjustable voltage by changing adjustable resistance；Since the resistance of reference circuit is relatively fixed, institute
It is basically unchanged with the reference voltage of output；Since the voltage difference of adjustable voltage and reference voltage is the voltage or volt grade of millivolt level
Voltage can improve the voltage of millivolt level after adjustable voltage and reference voltage are carried out operation amplifier processing by operational amplifying module
Stability reduces the error of voltage generation circuit.The utility model can export positive and negative adjustable by adjusting rheostatic resistance value
Millivolt step voltage or volt step voltage, and by changing corresponding rheostat, the range and precision of adjustable output voltage,
Keep the applicable surface of circuit more extensive, to reduce the cost of voltage generation circuit.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model；
Wherein: 1- main power source；2- isolation module；3- voltage regulating module；4- voltage control module；5- operational amplifying module；6-
Unilateral diode；41- resistance trimming circuit；42- reference circuit；411- first resistor；412- slide rheostat；413- second resistance；
421- 3rd resistor；The 4th resistance of 422-；51- first via amplifier；The No. second 52- amplifier；The first noninverting input of 511-；
The first reverse input end of 512-；The first output end of 513-；The second noninverting input of 521-；The second reverse input end of 522-；523-
Second output terminal；A- slider end；B- voltage reference points.
Specific embodiment
As used some vocabulary to censure specific components in the specification and claims.Those skilled in the art answer
It is understood that hardware manufacturer may call the same component with different nouns.This specification and claims are not with name
The difference of title is as the mode for distinguishing component, but with the difference of component functionally as the criterion of differentiation.Such as logical
The "comprising" of piece specification and claim mentioned in is an open language, therefore should be construed to " include but do not limit
In "." substantially " refer within an acceptable error range, those skilled in the art can solve technology within a certain error range
Problem basically reaches technical effect.
In the description of the present invention, it should be understood that term " on ", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as level " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description originally
Utility model and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore should not be understood as limiting the present invention.
In utility model unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation "
Equal terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
Connection inside element.For the ordinary skill in the art, above-mentioned term can be understood at this as the case may be
Concrete meaning in utility model.
The utility model is described in further detail below in conjunction with attached drawing, but not as the restriction to the utility model.
Embodiment 1
As shown in Figure 1, a kind of positive and negative adjustable millivolt level voltage generation circuit, including sequentially connected main power source 1, isolation
Module 2, voltage regulating module 3, voltage control module 4 and operational amplifying module 5, voltage control module 4 include resistance trimming circuit 41 and with
The reference circuit 42 in parallel of resistance trimming circuit 41, the both ends of resistance trimming circuit 41 are in parallel with voltage regulating module 3, and operational amplifying module 5 is distinguished
Connect resistance trimming circuit 41 and reference circuit 42.Isolation module 2 can export stable isolation voltage, prevent the voltage of main power source 1 not
Stablize and influence other modules, guarantees that each module works independently, without interruption；Voltage regulating module 3, for stable isolation is electric
Pressure is converted into predeterminated voltage, helps to improve the stability of voltage, prevents voltage from shaking；Due to resistance trimming circuit 41 have can
Resistance is adjusted, user makes resistance trimming circuit 41 export adjustable voltage by changing adjustable resistance；Since the resistance of reference circuit 42 is opposite
It is fixed, so the reference voltage of output is basically unchanged；Since the voltage difference of adjustable voltage and reference voltage is the electricity of millivolt level
Pressure or volt step voltage can improve millivolt level after adjustable voltage and reference voltage are carried out operation amplifier processing by operational amplifying module 5
Voltage stability, reduce the error of voltage generation circuit.
Preferably, resistance trimming circuit 41 includes first resistor 411, slide rheostat 412 and second resistance 413, first resistor
411 are electrically connected with the output end of voltage regulating module 3, and the binding post at 412 both ends of slide rheostat is separately connected first resistor 411 and
The slider end A of two resistance 413, slide rheostat 412 is electrically connected with the input terminal of operational amplifying module 5, second resistance 413 and tune
The ground terminal of die block 3 is electrically connected.Since the both ends binding post of slide rheostat 412 is separately connected first resistor 411 and second
Resistance 413, when first resistor 411 is equal with the resistance value of second resistance 413, and slider end A is located at 412 center of slide rheostat,
It is transported to the voltage of operational amplifying module 5, i.e. adjustable voltage, equal to the 1/2 of 3 output voltage of voltage regulating module, so slider end A is past
It is multiple mobile, the voltage for being transported to operational amplifying module 5 can be changed.
Preferably, reference circuit 42 includes the 3rd resistor 421 that is sequentially connected in series and the 4th resistance 422,3rd resistor 421 with
The output end of voltage regulating module 3 is electrically connected, and voltage reference points B, voltage ginseng are provided between 3rd resistor 421 and the 4th resistance 422
Examination point B is electrically connected with the input terminal of operational amplifying module 5, and the 4th resistance 422 is electrically connected with the ground terminal of voltage regulating module 3.When
When the resistance value of three resistance 421 and the 4th resistance 422 is equal, it is transported to the voltage of operational amplifying module 5, i.e. reference voltage, it is constant
It is the 1/2 of 3 output voltage of voltage regulating module.
Preferably, operational amplifying module 5 includes first via amplifier 51 and No. second amplifier 52, first via amplifier 51
It is provided with the first noninverting input 511, the first reverse input end 512 and is electrically connected with the first reverse input end 512 first defeated
Outlet 513, the first noninverting input 511 are electrically connected with slider end A, and No. second amplifier 52 is provided with the second noninverting input
521, the second reverse input end 522 and second output terminal 523, the second noninverting input 521 are electrically connected with voltage reference points B, the
Two reverse input ends 522 are electrically connected with second output terminal 523.Operational amplifying module 5 is had and is increased using the design of two-way amplifier
The advantages that beneficial height, common-mode rejection ratio is high, common mode range is wide, simple compensation, the operation is stable, and temperature stability is good between two amplifiers.
Preferably, the anode of main power source 1 is electrically connected by unilateral diode 6 with the input terminal of isolation module 2, main power source 1
Cathode be electrically connected with the ground terminal of isolation module 2.6 permission electric currents of unilateral diode are flowed through by single direction, help to mention
The stability of high voltage.
Preferably, the input terminal of voltage regulating module 3 and ground terminal are connected with the filter capacitor of multiple parallel connections, voltage regulating module 3
Output and ground is connected with the filter capacitor of multiple parallel connections.Filter capacitor keeps the direct current of output smoother, and using in parallel
Mode improves the working effect of filter capacitor.
Preferably, the output end of isolation module 2 is electrically connected with the power input of operational amplifying module 5.Due to isolation mode
The output voltage of block 2 is relatively stable, and is isolated with main power source 1, so isolation module 2 is powered to operational amplifying module 5, prevents
Only operational amplifying module 5 is influenced by main power source 1.
The invention also discloses a kind of control method of positive and negative adjustable millivolt level voltage generation circuit, including it is as follows
Step:
1) start main power source 1, voltage passes sequentially through unilateral diode 6, isolation module 2 and voltage regulating module 3 and is converted into stabilization
Predeterminated voltage；
2) stable predeterminated voltage passes through resistance trimming circuit 41, exports adjustable voltage at slider end A, and is transported to first in the same direction
Input terminal 511；
3) stable predeterminated voltage passes through reference circuit 42, output reference voltage at voltage reference points B, and is transported to second
Noninverting input 521；
4) after operational amplifying module 5 carries out operation amplifier processing to adjustable voltage and reference voltage, user is by voltage tester
Device is connected to the first output end 513 and second output terminal 523, tests output voltage values, then by mobile slider end A, adjusts
Required millivolt step voltage and voltage it is positive and negative.
In above-mentioned steps, the adjustable voltage and reference voltage exported after the processing of operational amplifying module 5, voltage difference is milli
Lie prostrate step voltage.Since the both ends binding post of slide rheostat 412 is separately connected first resistor 411 and second resistance 413, when first
Resistance 411 is equal with the resistance value of second resistance 413, when slider end A is located at 412 center of slide rheostat, is transported to operation amplifier
The voltage of module 5, i.e. adjustable voltage, so slider end A is moved back and forth, can change equal to the 1/2 of 3 output voltage of voltage regulating module
It is transported to the voltage of operational amplifying module 5；When the resistance value of 3rd resistor 421 and the 4th resistance 422 is equal, it is transported to operation and puts
The voltage of big module 5, i.e. reference voltage, constant is the 1/2 of 3 output voltage of voltage regulating module, after slider end A is mobile, adjustable electric
Pressure is more than or less than reference voltage, and the voltage difference of the two is greater than or equal to zero at this time, i.e., by mobile sliding block A, changes adjustable electric
The voltage difference of pressure and reference voltage, to change the positive and negative of millivolt step voltage and voltage；If the electricity of adjustable voltage and reference voltage
Pressure difference is smaller, then exports a millivolt step voltage；If the voltage difference of adjustable voltage and reference voltage is larger, volt step voltage is exported；Cause
This slider end A can by move back and forth adjust millivolt step voltage height and voltage it is positive and negative.
It should be noted that: in the control method of the utility model, step 1) voltage passes through isolation module 2 first, obtains
Opposite burning voltage after to isolation obtains more stable predeterminated voltage, while filter capacitor then by voltage regulating module 3
The direct current of output can be made more smooth, to keep predeterminated voltage more stable；Step 4) is since slider end A is in slide rheostat
When 412 center, the adjustable voltage of output is equal with the reference voltage that reference circuit 42 exports, i.e. the voltage difference of the two is zero, when
After slider end A is mobile, adjustable voltage is more than or less than reference voltage, and the voltage difference of the two is greater than or equal to zero at this time, that is, realizes
Mobile sliding block A changes the voltage difference of adjustable voltage and reference voltage, finally defeated in the first output end 513 and second output terminal 523
Millivolt step voltage out.
Embodiment 2
As shown in Figure 1, unlike the first embodiment: the main power source 1 of the present embodiment is 5V DC power supply, isolation module 2
Voltage can be upgraded to 9V from 5V, and export stable isolation voltage, the model of voltage regulating module 3 by model B0509
Voltage can be dropped to 5V from 9V by LM1117M5, filter capacitor 0.1uF, the model LM258 of operational amplifying module 5, and first
Resistance 411, second resistance 413,3rd resistor 421, the 4th resistance 422 are 1K Ω, according to Fig. 1 circuit diagram, by reference voltage
VWith reference to=5*R4/ (R3+R4), can obtain reference voltage VWith reference to=2.5V, it is assumed that Rx is that slider end A moves on to 412 center of slide rheostat
When resistance, the output area of millivolt step voltage is that -75mV arrives+75mV, the i.e. model of the voltage difference of adjustable voltage and reference voltage
It encloses and arrives+75mV for -75mV, by adjustable voltage VIt is adjustable=5* (R2+Rx)/(R1+R2+Rx), -75mV < VIt is adjustable-VWith reference to< -75mV, can
61.85 Ω of -58.25 Ω < Rx < is obtained, therefore 412 resistance of slide rheostat is that 62 Ω can meet above-mentioned condition, while select
When slide rheostat 412, if can not find suitable slide rheostat 412, can be changed first resistor 411, second resistance 413,
The resistance value of 3rd resistor 421 and the 4th resistance 422, therefore the resistance of the range of millivolt step voltage and precision and slide rheostat 412
Value is associated, realizes by changing corresponding resistance, the range and precision of adjustable millivolt step voltage.
Other structures are same as Example 1, and which is not described herein again.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and is modified.Therefore, the utility model is not limited to above-mentioned specific embodiment, all this field skills
It is practical new that art personnel any conspicuous improvement made on the basis of the utility model, replacement or modification belong to this
The protection scope of type.In addition, these terms are intended merely to facilitate although using some specific terms in this specification
It is bright, any restrictions are not constituted to the utility model.
Claims (7)
1. a kind of positive and negative adjustable millivolt level voltage generation circuit, it is characterised in that: including sequentially connected main power source (1), every
From module (2), voltage regulating module (3), voltage control module (4) and operational amplifying module (5), voltage control module (4) packet
Include resistance trimming circuit (41) and the reference circuit (42) in parallel with resistance trimming circuit (41), the both ends of the resistance trimming circuit (41) with
The voltage regulating module (3) is in parallel, and the operational amplifying module (5) is separately connected the resistance trimming circuit (41) and the reference circuit
(42)。
2. a kind of positive and negative adjustable millivolt level voltage generation circuit as described in claim 1, it is characterised in that: the resistance trimming electricity
Road (41) includes first resistor (411), slide rheostat (412) and second resistance (413), the first resistor (411) and institute
The output end electrical connection of voltage regulating module (3) is stated, the binding post at slide rheostat (412) both ends is separately connected first electricity
Hinder (411) and the second resistance (413), slider end A and the operational amplifying module (5) of the slide rheostat (412)
Input terminal electrical connection, the second resistance (413) is electrically connected with the ground terminal of the voltage regulating module (3).
3. a kind of positive and negative adjustable millivolt level voltage generation circuit as claimed in claim 2, it is characterised in that: the benchmark electricity
Road (42) includes the 3rd resistor (421) being sequentially connected in series and the 4th resistance (422), the 3rd resistor (421) and the pressure regulation
The output end of module (3) is electrically connected, and is provided with Voltage Reference between the 3rd resistor (421) and the 4th resistance (422)
Point B, the voltage reference points B are electrically connected with the input terminal of the operational amplifying module (5), the 4th resistance (422) and institute
State the ground terminal electrical connection of voltage regulating module (3).
4. a kind of positive and negative adjustable millivolt level voltage generation circuit as claimed in claim 3, it is characterised in that: the operation is put
Big module (5) includes first via amplifier (51) and No. second amplifier (52), and the first via amplifier (51) is provided with the
One noninverting input (511), the first reverse input end (512) and be electrically connected with first reverse input end (512) first
Output end (513), first noninverting input (511) are electrically connected with the slider end A, and No. second amplifier (52) is set
It is equipped with the second noninverting input (521), the second reverse input end (522) and second output terminal (523), the described second input in the same direction
End (521) is electrically connected with the voltage reference points B, second reverse input end (522) and the second output terminal (523) electricity
Connection.
5. a kind of positive and negative adjustable millivolt level voltage generation circuit as described in claim 1, it is characterised in that: the main power source
(1) anode is electrically connected by unilateral diode (6) with the input terminal of the isolation module (2), the cathode of the main power source (1)
It is electrically connected with the ground terminal of the isolation module (2).
6. a kind of positive and negative adjustable millivolt level voltage generation circuit as described in claim 1, it is characterised in that: the pressure regulation mould
The input terminal and ground terminal of block (3) are connected with the filter capacitor of multiple parallel connections, the output and ground of the voltage regulating module (3)
It is connected with the filter capacitor of multiple parallel connections.
7. a kind of positive and negative adjustable millivolt level voltage generation circuit as described in claim 1, it is characterised in that: the isolation mode
The output end of block (2) is electrically connected with the power input of the operational amplifying module (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821692814.6U CN209028496U (en) | 2018-10-18 | 2018-10-18 | A kind of positive and negative adjustable millivolt level voltage generation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821692814.6U CN209028496U (en) | 2018-10-18 | 2018-10-18 | A kind of positive and negative adjustable millivolt level voltage generation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209028496U true CN209028496U (en) | 2019-06-25 |
Family
ID=66906757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821692814.6U Active CN209028496U (en) | 2018-10-18 | 2018-10-18 | A kind of positive and negative adjustable millivolt level voltage generation circuit |
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| Country | Link |
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| CN (1) | CN209028496U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109343632A (en) * | 2018-10-18 | 2019-02-15 | 江苏塔菲尔新能源科技股份有限公司 | The positive and negative adjustable millivolt level voltage generation circuit of one kind and its control method |
-
2018
- 2018-10-18 CN CN201821692814.6U patent/CN209028496U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109343632A (en) * | 2018-10-18 | 2019-02-15 | 江苏塔菲尔新能源科技股份有限公司 | The positive and negative adjustable millivolt level voltage generation circuit of one kind and its control method |
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