CN206993078U - A kind of on-off circuit and the cooking apparatus with the on-off circuit - Google Patents
A kind of on-off circuit and the cooking apparatus with the on-off circuit Download PDFInfo
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- CN206993078U CN206993078U CN201720978789.7U CN201720978789U CN206993078U CN 206993078 U CN206993078 U CN 206993078U CN 201720978789 U CN201720978789 U CN 201720978789U CN 206993078 U CN206993078 U CN 206993078U
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Abstract
The utility model, which provides a kind of on-off circuit and the cooking apparatus with the on-off circuit, the on-off circuit, to be included：Switch element, voltage detecting end points is provided between the switch element and the load；Driver element, the driver element are used to provide driving voltage；Detection unit, the detection unit are used for the voltage for detecting the voltage detecting end points, and formed with Voltage Feedback end points in the detection unit；Control unit, the testing result that described control unit is configured to the detection unit controls the driver element, to close the driver element in the load abnormal；Wherein, the driver element is connected with the Voltage Feedback end points, when the voltage of the Voltage Feedback end points is in low level, to drag down the driving voltage.Hardware circuit can be run through in load short circuits according to on-off circuit of the present utility model and directly turn off switch element, the reaction time is fast, can protection switch element to greatest extent, reduce the probability of switch element damage.
Description
Technical field
Power tube on-off circuit technical field is the utility model is related to, in particular to a kind of on-off circuit and with this
The cooking apparatus of on-off circuit.
Background technology
Power tube as load conduction and shut-off switching device because it is more fragile, in many use occasions usually
Because load internal short-circuit or other abnormal conditions make power tube cause to damage because of excessively stream, although there is partial circuit also to use one
A little measures carry out the protection to power tube short circuit, but because the reaction time is often not fast enough, protection easily causes work(too late and still
Rate pipe damages, while partial circuit can have the hiccups the protection power tube of formula, and power tube can equally damage if shut-off in time.
Therefore, it is necessary to propose that a kind of on-off circuit has the cooking apparatus of the on-off circuit, to solve at least partly to solve
Certainly above mentioned problem.
Utility model content
A series of concept of reduced forms is introduced in utility model content part, this will be in specific embodiment part
Middle further description.Utility model content part of the present utility model is not meant to attempt to limit claimed
Technical scheme key feature and essential features, do not mean that the guarantor for attempting to determine technical scheme claimed more
Protect scope.
In order to overcome the problem of presently, there are, on the one hand the utility model provides a kind of on-off circuit, loaded for controlling
The turn-on and turn-off of circuit, including：
Switch element, the switch element and connected in series with the load are opened between loaded work piece power supply and ground, and described
Close and be provided with voltage detecting end points between element and the load；
Driver element, the driver element is used to provide driving voltage, to control the turn-on and turn-off of the switch element；
Detection unit, the detection unit are used for the voltage for detecting the voltage detecting end points, and in the detection unit
Formed with Voltage Feedback end points；
Control unit, the testing result control driving that described control unit is configured to the detection unit are single
Member, to close the driver element in the load abnormal；
Wherein, the driver element is connected with the Voltage Feedback end points, with the voltage of the Voltage Feedback end points
When low level, the driving voltage is dragged down, to turn off the switch element.
Exemplarily, the switch element is power tube, and the colelctor electrode of the power tube connects with the load, the work(
The grounded emitter of rate pipe, the base stage of the power tube are connected with the driver element, with the presence of the driving voltage
On or off.
Exemplarily, the driving voltage is square-wave voltage.
Exemplarily, the detection unit includes：
First detection branch, first detection branch include the first diode and the first current-limiting resistance being connected in series,
The negative electrode of first diode is connected with the voltage detecting end points, the anode of first diode and first current limliting
The first end connection of resistance, the second end of first current-limiting resistance connects with the Voltage Feedback end points and the driver element
Connect；
First voltage comparator, the anode of the inverting input of the first voltage comparator and first diode connect
Connect, the in-phase input end of the first voltage comparator is connected with reference voltage；
Second voltage comparator, the inverting input of the second voltage comparator are connected with reference voltage, and described second
The in-phase input end of voltage comparator is connected with the output end of the first voltage comparator, the second voltage comparator it is defeated
Go out end to be connected with the Voltage Feedback end points.
Exemplarily, the detection unit also includes：
First pull-up resistor, the first end of first pull-up resistor are connected with on-off circuit operating voltage, and described first
Second end of pull-up resistor is connected with the output end of the first voltage comparator；
Second pull-up resistor, the first end of second pull-up resistor is connected with the on-off circuit operating voltage, described
Second end of the second pull-up resistor is connected with the output end of the second voltage comparator.
Exemplarily, the detection unit also includes：
Second detection branch, second detection branch include pull down resistor, the second current-limiting resistance and the second diode, institute
State the first end ground connection of pull down resistor, the output end of the second end of the pull down resistor and the first voltage comparator and described
The first end connection of second current-limiting resistance, the second end of second current-limiting resistance are connected with the anode of second diode,
The negative electrode of second diode is connected with the output end of the second voltage comparator.
Exemplarily, between the first end of the second end of the pull down resistor and second current-limiting resistance formed with
Disconnected detection end points, described control unit control unlatching or the pass of the driver element based on the voltage for interrupting detection end points
Close.
Exemplarily, it is provided with the three or two between the second end of first current-limiting resistance and the Voltage Feedback end points
Pole pipe, the anode of the 3rd diode are connected with the second end of a current-limiting resistance, the negative electrode of the 3rd diode with
The Voltage Feedback end points connection.
Exemplarily, the detection unit also includes：
Filter capacitor, the first end of the filter capacitor is compared with the anode of first diode and the first voltage
The inverting input connection of device, the second end ground connection of the filter capacitor.
According to on-off circuit of the present utility model, energy when load short circuits cause the switch element excessively stream of such as power tube
Enough run through hardware circuit and directly turn off switch element, the reaction time is fast, protection switch element, reduction can open to greatest extent
The probability of component wear is closed, and driver element can also be closed by control unit with preferably after switch element shut-off
Protection switch element.According to on-off circuit of the present utility model, due to being effectively protected switch element, therefore reduce because different
Reason condition and damage Primary Component, reduce maintenance cost.
On the other hand the utility model also provides a kind of cooking apparatus, including load and on-off circuit as described above.
According to cooking apparatus of the present utility model, due to said switching circuit, therefore can with protective efficient switch element, and
Reduction damages Primary Component because of abnormal conditions, reduces maintenance cost.
Brief description of the drawings
Drawings below of the present utility model is used to understand the utility model in this as a part of the present utility model.Accompanying drawing
In show embodiment of the present utility model and its description, for explaining principle of the present utility model.
In accompanying drawing：
Fig. 1 shows the schematic block diagram of the on-off circuit according to the embodiment of the utility model one；
Fig. 2 shows the schematic circuit of the on-off circuit according to the embodiment of the utility model one.
Embodiment
In the following description, a large amount of concrete details are given more thoroughly to manage the utility model to provide
Solution.It is, however, obvious to a person skilled in the art that the utility model can be without one or more of these thin
Save and be carried out.In other examples, in order to avoid obscuring with the utility model, for more well known in the art
Technical characteristic is not described.
It should be appreciated that the utility model can be implemented in different forms, and should not be construed as being limited to carry here
The embodiment gone out.On the contrary, providing these embodiments disclosure will be made thoroughly and complete and the scope of the utility model is complete
Ground passes to those skilled in the art.In the accompanying drawings, for clarity, the size and relative size in Ceng He areas may be exaggerated certainly
Begin to represent identical element to whole same reference numerals.
It should be understood that when element or layer be referred to as " ... on ", " with ... it is adjacent ", " being connected to " or " being coupled to " other members
When part or layer, its can directly on other elements or layer, it is adjacent thereto, be connected or coupled to other elements or layer, or
There may be element or layer between two parties.On the contrary, when element be referred to as " on directly existing ... ", " with ... direct neighbor ", " be directly connected to
To " or when " being directly coupled to " other elements or layer, then element or layer between two parties is not present.It should be understood that although art can be used
Language first, second, third, etc. describe various elements, part, area, floor and/or part, these elements, part, area, floor and/or portion
Dividing to be limited by these terms.These terms are used merely to distinguish an element, part, area, floor or part and another
Element, part, area, floor or part.Therefore, do not departing under the utility model teaching, the first element discussed below, portion
Part, area, floor or part are represented by the second element, part, area, floor or part.
Spatial relationship term for example " ... under ", " ... below ", " below ", " ... under ", " ... on ",
" above " etc., herein can for convenience description and by using so as to describe an element shown in figure or feature with it is other
The relation of element or feature.It should be understood that in addition to the orientation shown in figure, spatial relationship term be intended to also including the use of with
The different orientation of device in operation.For example, if the device upset in accompanying drawing, then, is described as " below other elements "
Or " under it " or " under it " element or feature will be oriented to other elements or feature " on ".Therefore, exemplary term
" ... below " and " ... under " it may include upper and lower two orientations.Device, which can be additionally orientated, (to be rotated by 90 ° or other takes
To) and spatial description language as used herein correspondingly explained.
The purpose of term as used herein is only that description specific embodiment and not as limitation of the present utility model.
This is in use, " one " of singulative, "one" and " described/should " be also intended to include plural form, unless context understands finger
Go out other mode.It is also to be understood that term " composition " and/or " comprising ", when in this specification in use, determine the feature,
Integer, step, operation, the presence of element and/or part, but it is not excluded for one or more other features, integer, step, behaviour
The presence or addition of work, element, part and/or group.Herein in use, term "and/or" includes any of related Listed Items
And all combinations.
In order to thoroughly understand the utility model, detailed structure and step will be proposed in following description, to explain
The utility model proposes technical scheme.Preferred embodiment of the present utility model is described in detail as follows, but except these are detailed
Description is outer, and the utility model can also have other embodiment.
With reference to Fig. 1~Fig. 2 to being described in detail according to the on-off circuit of the embodiment of the utility model one.
Fig. 1 shows the schematic block diagram of the on-off circuit according to the embodiment of the utility model one.Such as Fig. 1 institutes
Show, on-off circuit 100 disclosed in the present embodiment includes driver element 101, switch element 102, detection unit 103 and control unit
104, wherein switch element 102 and load 105 is connected in series between loaded work piece power supply and ground, and in the He of switch element 102
Voltage detecting terminal A is provided between load 105, normal work is may determine that by detecting the voltage at voltage detecting terminal A
When load 105 whether there is short circuit or abnormal.
Driver element 101 is used to provide driving voltage, with the turn-on and turn-off of controlling switch element 102.Exemplarily, drive
The driving voltage that moving cell provides is square wave voltage signal, and when driving voltage is high level, switch element 102 turns on, voltage
Detection terminal A is in low level；When driving voltage is low level, switch element 102 turns off, and voltage detecting terminal A is in height
Level.
Detection unit 1103 is used for the voltage for detecting the voltage detecting end points, and formed with voltage in the detection unit
Feed back end points.Exemplarily, the Voltage Feedback end points is configured in the voltage detecting terminal A because load short circuits are in high electricity
Usually, the Voltage Feedback end points is in low level, and the driver element 101 is connected with the Voltage Feedback end points, with institute
When stating the voltage of Voltage Feedback end points and being in low level, the driving voltage is dragged down, to turn off the switch element.
Control unit 104 is configured to the testing result control driver element 101 of detection unit 103, with load 105
Driver element 101 is closed when abnormal.
According to the on-off circuit of the present embodiment, when load short circuits or it is abnormal when, voltage detecting terminal A can be in high level,
And when causing the voltage of the Voltage Feedback end points in the detection unit to be in low level, so as to drag down the driving electricity
Pressure, to turn off the switch element, i.e., according to the on-off circuit of the present embodiment can load short circuits or it is abnormal when pass through hardware
Circuit directly turns off rapidly switch element, so as to realize effective protection to switch element, and can closed by control unit
Driver element is closed, with preferably protection switch element.
Fig. 2 shows the schematic circuit of the on-off circuit according to the embodiment of the utility model one.
A kind of specific implementation circuit of on-off circuit according to the present embodiment is illustrated with reference to Fig. 2, with preferably
Understand on-off circuit of the present utility model.
As shown in Fig. 2 the on-off circuit of the present embodiment uses power tube Q1 to be gone here and there as switch element, power tube Q1 with load
Connection is connected between DC voltage and ground, and power tube Q1 colelctor electrode C and load connect, emitter E ground connection, base stage G and power
Pipe drive module connects, with or off under the driving voltage that is provided in power tube drive module.Exemplarily, power tube drives
The driving voltage that dynamic model block provides is square-wave voltage.Exemplarily, it is connected between power tube Q1 collector and emitter
Diode, to realize certain protection to power tube.
Power tube Q1 is the crucial device of control load (such as inductive load, ohmic load or capacitive load etc.) current switching
Part, and the core of this circuit protection, during load circuit works, load and power tube Q1 are begun to pass through to ground from DC voltage,
Complete the purpose to load acting.When load short circuits, power tube Q1 now becomes load, electric current and power tube Q1's
C, E both end voltages will raise rapidly, if can not judge and react in time, now power tube will permanent damage because
Even if fuse is connected in loop, but because the time of blown fuse is Millisecond, power tube Q1 can be because protect not in time
And permanent damage, cause whole electric equipment can not be further continued for using.
In order to which the quick protection to power tube can be realized in the present embodiment, detection circuit is added in on-off circuit
(i.e. part in Fig. 2 in dotted line frame), it uses two groups of voltage comparators U1A and U1B to judge whether to occur after doing voltage ratio
The abnormal conditions such as short circuit, voltage comparator have the advantages that reaction speed is fast, reliable and stable, cheap.
Power tube Q1 protections are described in detail to detecting the composition of circuit and how to realize below.VCC is in Fig. 2
The operating voltage (generally higher than equal to 15V) of on-off circuit, VM is reference voltage, general small less than single-chip microprocessor MCU supply voltage
In 5V.Power tube drive module is based on operating voltage VCC and provides driving voltage, i.e. driving voltage high level is VCC, such as 15V,
Low level is zero.
As shown in Fig. 2 detection circuit includes the first detection branch, first voltage comparator U1A, second voltage comparator
U1B and the second detection branch.
Wherein, the first detection branch includes the first diode D1 and the first current-limiting resistance R1, the first diode D1 negative electrode
Voltage detecting terminal A between power tube Q1 and load is connected, the first diode D1 anode and the first current-limiting resistance R1's
First end and first voltage comparator U1A inverting input 4 connect, and the first current-limiting resistance R1 the second end and power tube drive
Dynamic model block connects.
The first voltage comparator U1A diode D1 of inverting input 4 and first anode and the first current-limiting resistance R1
First end connection, first voltage comparator U1A in-phase input end 5 is connected with reference voltage, first voltage comparator U1A's
Output end 2 is connected with second voltage comparator U 1B in-phase input end 11.In the detection branch of first voltage comparator U1A and first
Filter capacitor C1 is set between road, for preventing from protecting by mistake, increases reliability.Filter capacitor C1 first end and first voltage ratio
Inverting input 4 compared with device 1A connects with the first diode D1 anode, filter capacitor C1 the second end ground connection.Filter capacitor C1
The sensitivity protected as needed of capacitance size determine, value too it is big then protects it is blunt, it is too small then easily disturbed to protect by mistake
Shield.
Second voltage comparator U1B inverting input 10 is connected with reference voltage VM, and second voltage comparator U1B's is same
Phase input 11 is connected with first voltage comparator U1A output end 2, second voltage comparator U1B output end 13 and voltage
Feed back terminal B connection.
Because first voltage comparator U1A and second voltage comparator U1B is when inverting input is more than in-phase input end,
Low level is exported, when inverting input is less than in-phase input end, vacantly, therefore the first pull-up electricity is also add in this circuit
Resistance R3 and the second pull-up resistor R4, the first pull-up resistor R3 first end are connected with operating voltage VCC, the first pull-up resistor R3's
Second end is connected with first voltage comparator U1A output end 2；Second pull-up resistor R4 first end connects with operating voltage VCC
Connect, the second pull-up resistor R4 the second end is connected with second voltage comparator U1B output end.
Second detection branch includes pull down resistor R5, the second current-limiting resistance R2 and the second diode D2, the pull down resistor
R5 first end ground connection, the second end of the pull down resistor R5 and the first voltage comparator U1A output end 2 and described the
Two current-limiting resistance R2 first end connection, the second end of the second current-limiting resistance R2 and the anode of the second diode D2 connect
Connect, the negative electrode of the second diode D2 is connected with the output end 13 of the second voltage comparator U1B.In the pull down resistor
The second end and second current-limiting resistance first end between formed with interrupt detect end points MCU interruption mouth, such as single-chip microcomputer
MCU control unit can be turned on and off based on the voltage control power tube drive module for interrupting detection end points.
Further, is provided between the second end of the first current-limiting resistance R1 and the Voltage Feedback end points B
Three diode D3, the anode of the 3rd diode D3 are connected with the second end of the current-limiting resistance R1, the three or two pole
Pipe D3 negative electrode is connected with the Voltage Feedback end points B.
The course of work and protection philosophy of the on-off circuit of the present embodiment be：Power tube Q1 G poles drive part and power
Pipe drive module connects, and when driving voltage is high level, power tube Q1 conductings, now power tube Q1 C-terminal is because power tube
Q1 conducting over the ground is changed into low level, i.e. D1 and R2 connection end are also low level.That is first voltage comparator U1A's is anti-phase defeated
It is low level, first voltage comparator U1A in-phase input end 5 and second voltage comparator U1B anti-phase input to enter 4 voltages of end
End 10 is reference voltage VM, and it is a certain voltage less than single-chip microprocessor MCU operating voltage, and the VM voltage swings can adjust power
The sensitivity of protection of pipe.Now the voltage of first voltage comparator U1A inverting input 4 is less than the voltage of in-phase input end 5,
Because first voltage comparator U1A output end 2 is connected to the first pull-up resistor R3, first voltage comparator U1A output
End 2 is high level VCC, and second voltage comparator U1B inverting input 10 is VM voltages, less than the electricity of in-phase input end 11
Pressure, because second voltage comparator U1B output end 13 is connected to the second pull-up resistor R4, therefore second voltage comparator U1B
Output end 13 is high level VCC.MCU interruption mouth is due to pull down resistor R5 and the first pull-up resistor R3, and R3 and R5 partial pressure is electric
Pressure value should approach with single-chip microprocessor MCU supply voltage, and at this time the voltage of MCU interruption mouth is high level, generation without exception.Work as driving
When voltage is low level, due to D3 clamping action, the voltage of MCU interruption mouth is also high level, generation without exception.
When driving voltage exports high level, power tube Q1 normallies, first voltage comparator U1A inverting input
4 be low level, if load short circuits or flow through power tube Q1 electric current it is excessive, i.e., excessively stream when, power tube Q1 C-terminal voltage quickly rises
Height, now first voltage comparator U1A inverting input 4 also raise by low level and more than VM voltage, therefore first
Voltage comparator U1A output end 2 exports low level so that the VM voltages of second voltage comparator U1B inverting input 10
More than the low level of in-phase input end 11, second voltage comparator U1B output end 13 can export low level, quickly drag down power
Pipe drive module, the driving voltage for exporting drive module are low level, and power tube turns off, because second voltage comparator U1B
Output end 13 export low level, it is by the second diode D2 and the second current-limiting resistance R2 second voltage comparator U1B's
In-phase input end 11 pulls into low level, and such power tube drive module is constantly in locking low level state, while MCU interruption
Mouthful level is by high level to low level, and the control unit of such as single-chip microprocessor MCU detects external interrupt, discovery load abnormal, from
And close power tube drive module.Now the control unit of such as single-chip microprocessor MCU is if necessary to once be soundd out confirmation again
No is real load short circuits, can reset the comparator circuit, and the method for reset changes into output state for MCU interruption mouth, so
Second voltage comparator U1B in-phase input end 11 is pulled into high level afterwards, now second voltage comparator U1B homophase input
11 voltages are held to be higher than the VM voltages of inverting input 10, second voltage comparator U1B output end 13 can export high level
VCC, the voltage comparator circuit now is resetted, prepared for next driving power pipe Q1, MCU middle ports continue to be changed into interrupting
Detection mouth, driving power pipe drive module is only needed again to work during lower task, if load be really short-circuit condition, guarantor
Protection circuit continues to act.
The utility model is illustrated by above-described embodiment, but it is to be understood that, above-described embodiment is
For the purpose illustrated and illustrated, and it is not intended to the utility model being limited in described scope of embodiments.In addition ability
Field technique personnel are it is understood that the utility model is not limited to above-described embodiment, according to teaching of the present utility model also
More kinds of variants and modifications can be made, these variants and modifications all fall within the utility model scope claimed with
It is interior.The scope of protection of the utility model is defined by the appended claims and its equivalent scope.
Claims (10)
- A kind of 1. on-off circuit, for controlling the turn-on and turn-off of load circuit, it is characterised in that including：Switch element, the switch element and connected in series with the load switch member between loaded work piece power supply and ground, and described Voltage detecting end points is provided between part and the load；Driver element, the driver element is used to provide driving voltage, to control the turn-on and turn-off of the switch element；Detection unit, the detection unit is used for the voltage for detecting the voltage detecting end points, and is formed in the detection unit There is Voltage Feedback end points；Control unit, the testing result that described control unit is configured to the detection unit control the driver element, with The driver element is closed in the load abnormal；Wherein, the driver element is connected with the Voltage Feedback end points, to be in low in the voltage of the Voltage Feedback end points During level, the driving voltage is dragged down, to turn off the switch element.
- 2. on-off circuit according to claim 1, it is characterised in that the switch element is power tube, the power tube Colelctor electrode connected with the load, the grounded emitter of the power tube, the base stage of the power tube and the driver element Connection, with the on or off in the presence of the driving voltage.
- 3. on-off circuit according to claim 1, it is characterised in that the driving voltage is square-wave voltage.
- 4. on-off circuit according to claim 1, it is characterised in that the detection unit includes：First detection branch, first detection branch includes the first diode and the first current-limiting resistance being connected in series, described The negative electrode of first diode is connected with the voltage detecting end points, the anode of first diode and first current-limiting resistance First end connection, the second end of first current-limiting resistance is connected with the Voltage Feedback end points and the driver element；First voltage comparator, the inverting input of the first voltage comparator are connected with the anode of first diode, The in-phase input end of the first voltage comparator is connected with reference voltage；Second voltage comparator, the inverting input of the second voltage comparator are connected with reference voltage, the second voltage The in-phase input end of comparator is connected with the output end of the first voltage comparator, the output end of the second voltage comparator It is connected with the Voltage Feedback end points.
- 5. on-off circuit according to claim 4, it is characterised in that the detection unit also includes：First pull-up resistor, the first end of first pull-up resistor are connected with on-off circuit operating voltage, first pull-up Second end of resistance is connected with the output end of the first voltage comparator；Second pull-up resistor, the first end of second pull-up resistor are connected with the on-off circuit operating voltage, and described second Second end of pull-up resistor is connected with the output end of the second voltage comparator.
- 6. on-off circuit according to claim 4, it is characterised in that the detection unit also includes：Second detection branch, second detection branch includes pull down resistor, the second current-limiting resistance and the second diode, under described The first end ground connection of pull-up resistor, the second end of the pull down resistor and the output end and described second of the first voltage comparator The first end connection of current-limiting resistance, the second end of second current-limiting resistance is connected with the anode of second diode, described The negative electrode of second diode is connected with the output end of the second voltage comparator.
- 7. on-off circuit according to claim 6, it is characterised in that at the second end of the pull down resistor and described second Formed with detection end points is interrupted between the first end of current-limiting resistance, described control unit is based on the voltage for interrupting detection end points Control being turned on and off for the driver element.
- 8. on-off circuit according to claim 4, it is characterised in that at the second end of first current-limiting resistance and described The 3rd diode, the anode of the 3rd diode and the second end of a current-limiting resistance are provided between Voltage Feedback end points Connection, the negative electrode of the 3rd diode are connected with the Voltage Feedback end points.
- 9. on-off circuit according to claim 4, it is characterised in that the detection unit also includes：Filter capacitor, the anode of the first end of the filter capacitor and first diode and the first voltage comparator Inverting input connects, the second end ground connection of the filter capacitor.
- 10. a kind of cooking apparatus, it is characterised in that including load and opening as described in any one in claim 1-9 Powered-down road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720978789.7U CN206993078U (en) | 2017-08-07 | 2017-08-07 | A kind of on-off circuit and the cooking apparatus with the on-off circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720978789.7U CN206993078U (en) | 2017-08-07 | 2017-08-07 | A kind of on-off circuit and the cooking apparatus with the on-off circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206993078U true CN206993078U (en) | 2018-02-09 |
Family
ID=61418519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720978789.7U Active CN206993078U (en) | 2017-08-07 | 2017-08-07 | A kind of on-off circuit and the cooking apparatus with the on-off circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206993078U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115268325A (en) * | 2022-07-27 | 2022-11-01 | 广达创芯电子技术(杭州)有限公司 | Double PMOS load protection alarm circuit |
-
2017
- 2017-08-07 CN CN201720978789.7U patent/CN206993078U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115268325A (en) * | 2022-07-27 | 2022-11-01 | 广达创芯电子技术(杭州)有限公司 | Double PMOS load protection alarm circuit |
| CN115268325B (en) * | 2022-07-27 | 2023-09-05 | 广达创芯电子技术(杭州)有限公司 | Double PMOS load protection alarm circuit |
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