CN206065624U - A kind of anti-biasing circuit - Google Patents
A kind of anti-biasing circuit Download PDFInfo
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- CN206065624U CN206065624U CN201520829526.0U CN201520829526U CN206065624U CN 206065624 U CN206065624 U CN 206065624U CN 201520829526 U CN201520829526 U CN 201520829526U CN 206065624 U CN206065624 U CN 206065624U
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Abstract
This utility model provides a kind of anti-biasing circuit.Wherein, the anti-biasing circuit includes the first contrast circuit, the integrating circuit of output current Regulate signal, foundation magnetic bias situation, exports the feedback circuit and power supply chip of corresponding current feedback signal；First contrast circuit receives the current regulating signal of the integrating circuit output and the current feedback signal of feedback circuit output, and contrasts the current regulating signal with current feedback signal so as to export the first corresponding level signal；The preset given input of the power supply chip receives first level signal, and is based on first level signal, adjusts the signal width of pulse output.The impact of magnetic bias can be avoided according to the concrete condition of magnetic bias or saturation etc., the pulse signal width of adjust automatically power supply chip output, its processing cost is relatively low, is easy to promote the use of.
Description
Technical field
This utility model is related to inverter circuit technical field, more particularly to a kind of anti-biasing circuit.
Background technology
Contravariant arc welding power source has commercially replaced traditional line-frequency transformer type inverter voltage at present substantially, because it has
High conversion efficiency, small volume is lightweight, a series of advantages such as precise controlling can be realized, in the frequent movement of some requirements
Use occasion is even more to be favored by client, such as outdoor billboard welding, erection of doors and windows etc..Wide market, but because product doors
Sill are low, and many enterprise peaks are gathered around, and cause existing market competitive pressure big, and cost pressure is increasing, because in cost and reliability
Between trial of strength it is more and more obvious.
Wherein, magnetic bias is a kind of very common phenomenon in inverter circuit.Due to device, material, technique can not possibly do
To full symmetric.Therefore, in reality, bias phenomenon cannot be avoided.Due to the presence of magnetic bias so that need to increase switching tube
The tolerance of current stress, main transformer need to amplify to prevent saturated phenomenon caused by magnetic bias.
In addition, switching tube causes switching loss to increase with conduction loss due to magnetic bias, need to increase heat sink size and dissipate
Hot-air blower etc. one is problem, causes the integrated cost of above-mentioned processing method of a relatively high.
Therefore, prior art is also to be developed.
Utility model content
In view of in place of above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of anti-biasing circuit, purport
In prior art is solved the problems, such as, magnetic bias processing method integrated cost is higher.
In order to achieve the above object, this utility model takes technical scheme below：
A kind of anti-biasing circuit, wherein, the anti-biasing circuit includes the first contrast circuit, output current Regulate signal
Integrating circuit, foundation magnetic bias situation, export the feedback circuit and power supply chip of corresponding current feedback signal；
The current regulating signal and the feedback circuit that first contrast circuit receives the integrating circuit output is defeated
The current feedback signal for going out, and the current regulating signal is contrasted with current feedback signal so as to export the first corresponding level
Signal；
The preset given input of the power supply chip receives first level signal, and is based on first level
Signal, adjusts the signal width of pulse output.
Described anti-biasing circuit, wherein, the anti-biasing circuit also includes the second contrast circuit, foundation pulsewidth situation,
First output circuit of output relevant voltage signal, the second output circuit of output predetermined voltage signals；
Second contrast circuit receives the relevant voltage signal and the second output circuit of the first output circuit output
The predetermined voltage signals of output, and both are contrasted so as to export corresponding second electrical level signal；The power supply chip it is preset
Given input receives the second electrical level signal, and is based on the second electrical level signal, adjusts the signal width of pulse output
Degree.
Described anti-biasing circuit, wherein, second contrast circuit includes four-operational amplifier, the 4th operation amplifier
Device feedback circuit and the second one-way conduction circuit；Second one-way conduction circuit includes the tenth diode and the 16th resistance；
The positive input of the four-operational amplifier is connected with second output circuit, and its reverse input end is defeated with described first
Enter circuit connection, its outfan is connected with the negative pole of the tenth diode；The positive pole of the tenth diode passes through the 16th resistance
It is connected with the preset given input of power supply chip；When reverse input end level signal is higher than positive input, by described
Four-operational amplifier feedback circuit, makes the outfan of four-operational amplifier export negative level.
Described anti-biasing circuit, wherein, the feedback circuit include the 13rd resistance, the 6th electric capacity, the 14th resistance,
7th electric capacity, the 15th resistance and the 7th diode；The negative input of the four-operational amplifier passes sequentially through the tenth
Three resistance and the 6th electric capacity are connected with outfan, are also connected with outfan by the 14th resistance, also by the 7th electric capacity with it is defeated
Go out end connection, be also connected with the negative pole of the 7th diode by the 15th resistance, negative pole and the 4th computing of the 7th diode are put
The input connection of big device.
Described anti-biasing circuit, wherein, first output circuit include the first diode, the second diode, first
Resistance, second resistance, the first electric capacity, first voltage follower and the tenth resistance；The power supply chip includes for a pair exporting arteries and veins
Rush first pulse output end and the second pulse output end of signal；Described first and second pulse output end is respectively with described first
And second diode positive pole connection, the negative pole of first and second diode is connected with one end of the first resistor, and first is electric
The other end of resistance passes through the first electric capacity respectively and second resistance is grounded, and is also connected with the input of first voltage follower；It is described
The outfan of first voltage follower is also connected with the reverse input end of the four-operational amplifier by the tenth resistance, output
The voltage signal corresponding with pulsewidth situation.
Described anti-biasing circuit, wherein, the second output circuit is specifically included：It is 5th diode, the 5th resistance, the 6th electric
Resistance, the 4th electric capacity, the 20th resistance, the 9th resistance, the 9th diode and the second operational amplifier；5th diode
Positive terminal is connected with the negative pole of first and second diode, and the negative pole end of the 5th diode passes sequentially through the 5th resistance and
Six resistance eutral groundings, the 5th resistance also passes through the 4th capacity earth and the positive input in the second operational amplifier connects；
First voltage passes through the 20th resistance and the 9th electric resistance partial pressure, and by the 9th diode and the described second fortune
Calculate the positive input connection of amplifier；Second operational amplifier forms second voltage follower, its outfan with pass through
11st and the 17th resistance is connected with the positive input of the four-operational amplifier.
Described anti-biasing circuit, wherein, first contrast circuit includes the first operational amplifier, the first operation amplifier
Device feedback circuit and the second one-way conduction circuit；The outfan of the integrating circuit is positive defeated with first operational amplifier
Enter end connection；The outfan of the feedback circuit is connected with the reverse input end of first operational amplifier；First fortune
Calculate amplifier to be connected with the preset given input of the power supply chip by the second one-way conduction circuit；First computing is put
Big device feedback circuit changes first operation amplifier according to the voltage-contrast situation of the positive input and reverse input end
First level signal of device output.
Described anti-biasing circuit, wherein, two one-way conduction circuit includes the 4th diode and the 12nd resistance；
The negative pole of the 4th diode is connected with the outfan of first operational amplifier, the positive pole of the 4th diode
It is connected with the preset given input of the power supply chip by the 12nd resistance, when the outfan of first operational amplifier
Turn on during output negative level signal.
Described anti-biasing circuit, wherein, the integrating circuit specifically includes current regulating circuit, the second electric capacity and the 4th
Resistance；The current regulating circuit is connected with one end of the 4th resistance, and the other end of the 4th resistance is gone back by the second capacity earth
It is connected with the first contrast circuit, output current Regulate signal.Described anti-biasing circuit, wherein, the feedback circuit is specifically wrapped
Include peak holding circuit and current sampling circuit；
The peak holding circuit includes the 3rd diode, 3rd resistor and the 3rd electric capacity；
The outfan of the current sampling circuit is connected with the positive pole of the 3rd diode, the 3rd diode it is negative
Pole is connected with one end of the 3rd resistor and the second electric capacity, is also connected with first contrast circuit by the 7th resistance；Institute
State the other end ground connection of 3rd resistor and the 3rd electric capacity；
When there is magnetic bias, the outfan output voltage of the current sampling circuit is raised.
Beneficial effect：A kind of anti-biasing circuit that this utility model is provided, can be according to magnetic bias or the concrete feelings of saturation
Condition, the pulse signal width of adjust automatically power supply chip output, avoids the impact of magnetic bias, and its processing cost is relatively low, is easy to push away
It is wide to use.
Further, anti-biasing circuit described in the utility model also has pulse-width controlled function, can be according to output
Pulse signal carries out feedback adjustment, it is to avoid the problem that cannot be adjusted when power management chip side reaches maximum pulse width, makes
Circuit is maintained at controllable state.
Description of the drawings
Circuit theory diagrams of the Fig. 1 for the anti-biasing circuit of this utility model specific embodiment.
Specific embodiment
This utility model provides a kind of anti-biasing circuit.To make the purpose of this utility model, technical scheme and effect more
Clear, clear and definite, the embodiment that develops simultaneously referring to the drawings is further described to this utility model.It should be appreciated that this place is retouched
The specific embodiment stated only to explain this utility model, is not used to limit this utility model.
As shown in figure 1, for a kind of anti-biasing circuit of this utility model specific embodiment.
The anti-biasing circuit includes the first contrast circuit, the integrating circuit of output current Regulate signal, foundation magnetic bias feelings
Condition, exports the feedback circuit and power supply chip of corresponding current feedback signal.
The current regulating signal and the feedback circuit that first contrast circuit receives the integrating circuit output is defeated
The current feedback signal for going out, and the current regulating signal is contrasted with current feedback signal so as to export the first corresponding level
Signal.
The preset given input of the power supply chip receives first level signal, and is based on first level
Signal, adjusts the signal width of pulse output.
When circuit is even up to saturation due to magnetic bias, the current feedback signal of feedback circuit output can be changed so as to change
First level signal, (for example the first level signal is dragged down), after power supply chip gets above- mentioned information, can be corresponding
(for example, when magnetic bias, appropriate puts narrow signal width for the output of adjustment pulse；When saturated, directly turn off, do not export any
Pulse signal) so as to realizing anti-magnetic bias, the function of protection circuit.
Specifically, as shown in figure 1, first contrast circuit includes the first operational amplifier IC1, the first operational amplifier
Feedback circuit and the second one-way conduction circuit.
The outfan of the integrating circuit is connected with the positive input of first operational amplifier.The feedback circuit
Outfan be connected with the reverse input end of first operational amplifier.
First operational amplifier passes through the preset given input of the second one-way conduction circuit and the power supply chip
Connection.
Voltage-contrast feelings of the first operational amplifier feedback circuit according to the positive input and reverse input end
Condition, changes the first level signal of the first operational amplifier output.
More specifically, second one-way conduction circuit includes the 4th diode D4 and the 12nd resistance R12.
As shown in figure 1, the negative pole of the 4th diode D4 is connected with the outfan of first operational amplifier, the 4th
The positive pole of diode D4 is connected with the preset given input of the power supply chip by the 12nd resistance R12.
Obvious, when the outfan output negative level signal of first operational amplifier, the 4th diode side
Can conducting.
In specific embodiment of the utility model, the integrating circuit specifically includes current regulating circuit A1, second electric
Hold C2 and the 4th resistance R2.The current regulating circuit A1 is connected with one end of the 4th resistance R4, the other end of the 4th resistance R4
It is grounded by the second electric capacity C2, is also connected with the first contrast circuit, (i.e. the first computing comparator is positive for output current Regulate signal
Input).
Specifically, the feedback circuit is specifically included：Peak holding circuit and current sampling circuit A2.The peak holding
Circuit includes the 3rd diode D3,3rd resistor R3 and the 3rd electric capacity C3.
As shown in figure 1, the outfan of the current sampling circuit A2 is connected with the positive pole of the 3rd diode D3, it is described
The negative pole of the 3rd diode D3 is connected with one end of 3rd resistor R3 and the 3rd electric capacity C3, also by the 7th resistance R7 and institute
State the first contrast circuit connection (i.e. the first computing comparator reverse input end).
The principle that implements of above-mentioned anti-magnetic bias function is：When current regulating signal is more than current feedback signal, IC1 will
Output high level.Due to the unilateral conduction of the 4th diode D4, therefore the preset given input to power supply IC does not cause shadow
Ring, i.e., pulse output OUTA and OUTB is not impacted.
And work as and magnetic bias occur, or even during saturated conditions, the outfan output voltage of the current sampling circuit will be raised.Reach
To after certain magnetic bias amplitude, reverse input end be raised to higher than operational amplifier IC1 positive input when, by the anti-of IC1
To amplification, by R18 and R19, C5 composition operational amplifier feedback circuit, IC1 outfans are made to be changed into negative level.By the four or two pole
The preset given input level of power supply chip (power supply IC) is dragged down by pipe D4 and the 12nd resistance R12.
Based on the level signal, the signal width of OUTA and OUTB is put and narrow plays in good time adjustment effect by power supply IC.
And work as magnetic bias to after certain amplitude, as IC1 output valves are excessively born, directly by IC5 will export OUTA or
OUTB is turned off, and does not export any pulse, so as to play a protective role.
In preferred embodiment of the present utility model, as shown in figure 1, the anti-biasing circuit can also be including the second contrast
Circuit, foundation pulsewidth situation, export the first output circuit, the second output electricity of output predetermined voltage signals of relevant voltage signal
Road.
Second contrast circuit receives the relevant voltage signal and the second output circuit of the first output circuit output
The predetermined voltage signals of output, and both are contrasted so as to export corresponding second electrical level signal；The power supply chip it is preset
Given input receives the second electrical level signal, and is based on the second electrical level signal, adjusts the signal width of pulse output
Degree.
By comparing voltage signal corresponding with pulsewidth situation and subscribing voltage signal, it is possible to achieve the feedback of pulsewidth is adjusted
Section, when pulsewidth reaches maximum, the preset given input level for dragging down the power supply chip is dragged down, so as to constriction exports arteries and veins
It is wide.
Specifically, second contrast circuit include four-operational amplifier IC4, four-operational amplifier feedback circuit and
Second one-way conduction circuit.
Second one-way conduction circuit includes the tenth diode D12 and the 16th resistance R16；4th operation amplifier
The positive input of device is connected with second output circuit, and its reverse input end is connected with first input circuit, and which is defeated
Go out end to be connected with the negative pole of the tenth diode.The positive pole of the tenth diode D12 passes through the 16th resistance R16 and power supply chip
The connection of preset given input.
When reverse input end level signal is higher than positive input, by the four-operational amplifier feedback circuit,
The outfan of four-operational amplifier is made to export negative level.
More specifically, as shown in figure 1, the four-operational amplifier feedback circuit includes the 13rd resistance R13, the 6th electric
Hold C6, the 14th resistance R14, the 7th electric capacity C7, the 15th resistance R15 and the 7th diode D7.
The negative input of the four-operational amplifier passes sequentially through the 13rd resistance R13 and the 6th electric capacity C6 with output
End connection, is also connected with outfan by the 14th resistance R14, is also connected with outfan by the 7th electric capacity C7, also by the
15 resistance R15 are connected with the negative pole of the 7th diode D7, the input of the negative pole and four-operational amplifier of the 7th diode D7
End connection.
The friendship of IC4, direct current times magnification can be adjusted by the parameter for adjusting the feedback circuit of above-mentioned four-operational amplifier
The response speed of number and amplifier.
First output circuit is specifically included：First diode, the second diode, first resistor, second resistance, first
Electric capacity, first voltage follower and the tenth resistance.
The power supply chip includes the first pulse output end OUTA and the second pulse output end of output pulse signal for a pair
OUTB。
Described first and second pulse output end is connected with the positive pole of first and second diode respectively, and first and
The negative pole of two diodes is connected with one end of the first resistor, and the other end of first resistor passes through the first electric capacity and second respectively
Resistance eutral grounding, is also connected with the input of first voltage follower.
The outfan of the first voltage follower is also reverse defeated with the four-operational amplifier by the tenth resistance
Enter end connection, voltage signal corresponding with pulsewidth situation described in output.
Second output circuit is then specifically included：5th diode D5, the 5th resistance R5, the 6th resistance R6, the 4th electric capacity C4,
20th resistance R20, the 9th resistance R9, the 9th diode D9 and the second operational amplifier IC2.
The positive terminal of the 5th diode is connected with the negative pole of first and second diode, the 5th diode it is negative
5th resistance and the 6th resistance eutral grounding are passed sequentially through extremely, the 5th resistance also passes through the 4th capacity earth and in the second computing
The positive input connection of amplifier.
First voltage VCC passes through the 20th resistance and the 9th electric resistance partial pressure, and by the 9th diode and described the
The positive input connection of two operational amplifiers；Second operational amplifier forms second voltage follower, its outfan with
It is connected with the positive input of the four-operational amplifier by the 11st and the 17th resistance.
Above-mentioned maximum pulse width controls the principle that implements of (pulsewidth feedback) function：As shown in figure 1, IC4's is positive defeated
Enter bleeder circuit of the end for resistance R20 and R9 compositions.Therefore, it can by the positive input of IC2 is adjusted to a fixed value,
Then the value of IC4 is arrived after adjusting resistance R11 and R17 partial pressures, substantially IC4 positive inputs value is determined.When pulsewidth reaches
When most wide, the value after the first diode D1 and the second diode D2 rectifications reaches maximum.(i.e. by resistance R1 and R2 partial pressures
Value reaches maximum)
The voltage follower constituted by IC3 (i.e. the output voltage of IC3 and input voltage keep).It is anti-as IC4
To input it is higher than the positive input level of IC4 when, by IC4 and the feedback of surrounding composition, the outfan of IC4 is changed into negative electricity
It is flat, then the electric current of power supply chip IC5 preset given side level is dragged down by the tenth diode D10 and the 16th resistance R16, and
Control OUTA accordingly to reduce with OUTB pulse widths.
Foregoing circuit effectively solve due to inside power supply chip IC5 due to certain side has been maximum pulse width when, then adjust
There is no the defect of adjustment space when whole, i.e., the space of certain self adjustment is reserved to IC5, be i.e. circuit always works at controllable
Region.
It is understood that for those of ordinary skills, can according to the technical solution of the utility model and
This utility model design in addition equivalent or change, and all these changes or replace should all belong to appended by this utility model
Scope of the claims.
Claims (10)
1. a kind of anti-biasing circuit, it is characterised in that the anti-biasing circuit includes that the first contrast circuit, output current adjust letter
Number integrating circuit, according to magnetic bias situation, export the feedback circuit and power supply chip of corresponding current feedback signal；
First contrast circuit receives what the current regulating signal and the feedback circuit of the integrating circuit output was exported
Current feedback signal, and the current regulating signal is contrasted with current feedback signal so as to export corresponding the first level letter
Number；
The preset given input of the power supply chip receives first level signal, and
Based on first level signal, the signal width of pulse output is adjusted.
2. anti-biasing circuit according to claim 1, it is characterised in that the anti-biasing circuit is also including the second contrast electricity
Road, foundation pulsewidth situation, export the first output circuit, the second output electricity of output predetermined voltage signals of relevant voltage signal
Road；
Second contrast circuit receives the relevant voltage signal of the first output circuit output and the output of the second output circuit
Predetermined voltage signals, and contrast both so as to exporting corresponding second electrical level signal；The preset of the power supply chip gives
Input receives the second electrical level signal, and
Based on the second electrical level signal, the signal width of pulse output is adjusted.
3. anti-biasing circuit according to claim 2, it is characterised in that second contrast circuit includes that the 4th computing is put
Big device, four-operational amplifier feedback circuit and the second one-way conduction circuit；
Second one-way conduction circuit includes the tenth diode and the 16th resistance；
The positive input of the four-operational amplifier is connected with second output circuit, its reverse input end and described
One input circuit connects, and its outfan is connected with the negative pole of the tenth diode；The positive pole of the tenth diode passes through the 16th
Resistance is connected with the preset given input of power supply chip；
When reverse input end level signal is higher than positive input, by the four-operational amplifier feedback circuit, the is made
The outfan output negative level of four-operational amplifier.
4. anti-biasing circuit according to claim 3, it is characterised in that the feedback circuit include the 13rd resistance,
Six electric capacity, the 14th resistance, the 7th electric capacity, the 15th resistance and the 7th diode；
The negative input of the four-operational amplifier passes sequentially through the 13rd resistance and the 6th electric capacity is connected with outfan, also
It is connected with outfan by the 14th resistance, is also connected with outfan by the 7th electric capacity, also by the 15th resistance and the 7th
The negative pole connection of diode, the negative pole of the 7th diode are connected with the input of four-operational amplifier.
5. anti-biasing circuit according to claim 3, it is characterised in that first output circuit includes the one or two pole
Pipe, the second diode, first resistor, second resistance, the first electric capacity, first voltage follower and the tenth resistance；
The power supply chip includes first pulse output end and the second pulse output end of output pulse signal for a pair；Described first
And second pulse output end be connected with the positive pole of first and second diode respectively, the negative pole of first and second diode with
One end connection of the first resistor, the other end of first resistor passes through the first electric capacity respectively and second resistance is grounded, also with the
The input connection of one voltage follower；
The outfan of the first voltage follower also passes through the reverse input end of the tenth resistance and the four-operational amplifier
Connection, voltage signal corresponding with pulsewidth situation described in output.
6. anti-biasing circuit according to claim 5, it is characterised in that the second output circuit is specifically included：Five or two pole
Pipe, the 5th resistance, the 6th resistance, the 4th electric capacity, the 20th resistance, the 9th resistance, the 9th diode and the second operation amplifier
Device；
The positive terminal of the 5th diode is connected with the negative pole of first and second diode, the negative pole end of the 5th diode
The 5th resistance and the 6th resistance eutral grounding are passed sequentially through, the 5th resistance also passes through the 4th capacity earth and in the second operation amplifier
The positive input connection of device；
First voltage passes through the 20th resistance and the 9th electric resistance partial pressure, and is put with second computing by the 9th diode
The positive input connection of big device；
Second operational amplifier forms second voltage follower, its outfan with pass through the 11st and the 17th resistance and institute
State the positive input connection of four-operational amplifier.
7. anti-biasing circuit according to claim 1, it is characterised in that first contrast circuit includes that the first computing is put
Big device, the first operational amplifier feedback circuit and the second one-way conduction circuit；
The outfan of the integrating circuit is connected with the positive input of first operational amplifier；The feedback circuit it is defeated
Go out end to be connected with the reverse input end of first operational amplifier；
First operational amplifier is connected with the preset given input of the power supply chip by the second one-way conduction circuit；
The first operational amplifier feedback circuit changes according to the voltage-contrast situation of the positive input and reverse input end
Become the first level signal of the first operational amplifier output.
8. anti-biasing circuit according to claim 7, it is characterised in that two one-way conduction circuit includes the four or two pole
Pipe and the 12nd resistance；
The negative pole of the 4th diode is connected with the outfan of first operational amplifier, and the positive pole of the 4th diode passes through
12nd resistance is connected with the preset given input of the power supply chip, when the outfan of first operational amplifier is exported
Turn on during negative level signal.
9. anti-biasing circuit according to claim 1, it is characterised in that the integrating circuit specifically includes electric current and adjusts electricity
Road, the second electric capacity and the 4th resistance；
The current regulating circuit is connected with one end of the 4th resistance, and the other end of the 4th resistance is gone back by the second capacity earth
It is connected with the first contrast circuit, output current Regulate signal.
10. anti-biasing circuit according to claim 1, it is characterised in that the feedback circuit specifically includes peak holding
Circuit and current sampling circuit；
The peak holding circuit includes the 3rd diode, 3rd resistor and the 3rd electric capacity；
The outfan of the current sampling circuit is connected with the positive pole of the 3rd diode, the negative pole of the 3rd diode with
One end connection of the 3rd resistor and the second electric capacity, is also connected with first contrast circuit by the 7th resistance；Described
The other end ground connection of three resistance and the 3rd electric capacity；
When there is magnetic bias, the outfan output voltage of the current sampling circuit is raised.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520829526.0U CN206065624U (en) | 2015-10-23 | 2015-10-23 | A kind of anti-biasing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520829526.0U CN206065624U (en) | 2015-10-23 | 2015-10-23 | A kind of anti-biasing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206065624U true CN206065624U (en) | 2017-04-05 |
Family
ID=58421898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520829526.0U Withdrawn - After Issue CN206065624U (en) | 2015-10-23 | 2015-10-23 | A kind of anti-biasing circuit |
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| Country | Link |
|---|---|
| CN (1) | CN206065624U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105290565A (en) * | 2015-10-23 | 2016-02-03 | 永康市帝普特科技有限公司 | Anti-bias circuit |
-
2015
- 2015-10-23 CN CN201520829526.0U patent/CN206065624U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105290565A (en) * | 2015-10-23 | 2016-02-03 | 永康市帝普特科技有限公司 | Anti-bias circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170405 Effective date of abandoning: 20170908 |
|
| AV01 | Patent right actively abandoned |