CN108983936A - Intelligent wireless pressing plate wake-up circuit - Google Patents
Intelligent wireless pressing plate wake-up circuit Download PDFInfo
- Publication number
- CN108983936A CN108983936A CN201811085824.8A CN201811085824A CN108983936A CN 108983936 A CN108983936 A CN 108983936A CN 201811085824 A CN201811085824 A CN 201811085824A CN 108983936 A CN108983936 A CN 108983936A
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- switch
- gate unit
- movable
- wake
- short circuit
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- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 6
- 230000000630 rising effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000002618 waking effect Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
Abstract
The present invention relates to a kind of wake-up circuits, including nor gate unit and switch, the first input end of the first end of the switch and the nor gate unit is for connecting power supply, the second end of the switch is for being grounded, the movable end of the switch is flexibly connected the first end of the switch and the second end of the switch, and the movable end of the switch is connect with the second input terminal of the nor gate unit.Disconnect the movable end and first end of short circuit type microswitch again after the movable end of switch is connect with second end, the movable end of switch is connected with the first end of switch and second end respectively, has an of short duration short-circuit process.By nor gate unit and switch series connection, when the switch state changes, i.e., it is described close the switch disconnect or be disconnected to closure during, can all occur an elder generation it is low after high, the pulse being then lower again.
Description
Technical field
The present invention relates to field of circuit technology, more particularly to a kind of wake-up circuit.
Background technique
Currently, intelligent wireless pressing plate is powered using battery, therefore extremely harsh, intelligent wireless thus is required system power dissipation
Pressing plate immediately enters dormant state to save power consumption, as CPU (Central Processing after needing to transmit completion data
Unit, central processing unit) enter dormant state after, if encountering pressing plate state change, it has to be possible to immediately call out the CPU of suspend mode
It wakes up, sends backstage main website for pressing plate status data, after pressing plate state change, the method for waking up CPU has Hall element, infrared
The various ways such as line, the considerations of for power consumption and reliability, microswitch is optimal selection, but on only receiving after CPU suspend mode
It rises along waking up, does not receive failing edge wake-up, so occurring high level when pressing plate being caused to put into, CPU can be waken up, pressing plate exits
When, it can not wake up.The application designs a kind of new-type circuit, so that no matter microswitch disconnects or be closed, can issue
Rising edge signal wakes up CPU.
Summary of the invention
Based on this, a kind of wake-up circuit is provided.
A kind of wake-up circuit in one of the embodiments, comprising:
The first input end of nor gate unit and switch, the first end of the switch and the nor gate unit is for connecting
Power supply is connect, for the second end of the switch for being grounded, the movable end of the switch is flexibly connected first end and the institute of the switch
The second end of switch is stated, the movable end of the switch is connect with the second input terminal of the nor gate unit.
The switch is short circuit type microswitch in one of the embodiments,.
It in one of the embodiments, further include resistance R1, the first of the first end of the switch and the nor gate
Input terminal is connect with the first end of the resistance R1 respectively, and the second end of the resistance R1 is for connecting power supply.
It in one of the embodiments, further include processing unit, the output end of the nor gate unit and the processing are single
Member connection.
The nor gate unit is SN74AUP1G02 model chip in one of the embodiments,.
It in one of the embodiments, include any of the above-described wake-up circuit as described in the examples.
Above-mentioned wake-up circuit is connected by nor gate unit and switch, by switch AND OR NOT gate unit series connection, works as switch
When state changes, the movable end of switch has an of short duration connection with first end and second end respectively, short using this of switch
No matter temporary short-circuit process switchs and how to act in conjunction with nor gate, the low rear high pulse of an elder generation can all occurs, to pass through
Wake up CPU.
Detailed description of the invention
Fig. 1 is the schematic diagram of the wake-up circuit of one embodiment of the invention.
Specific embodiment
To facilitate the understanding of the present invention, in order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, under
In conjunction with attached drawing, specific embodiments of the present invention will be described in detail in face.It is explained in the following description many details
To facilitate a thorough understanding of the present invention, giving better embodiment of the invention in attached drawing.But the present invention can be with many not
With form realize, however it is not limited to embodiments described herein.On the contrary, the purpose of providing these embodiments is that making
It makes the present disclosure more fully understandable.The present invention can be to be much different from other way described herein
Implement, those skilled in the art can make similar improvements without departing from the spirit of the invention, therefore the present invention not by
The limitation of following public specific embodiment.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.In the description of the present invention, " several " are meant that at least one, such as one,
Two etc., unless otherwise specifically defined.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term used herein is intended merely to the mesh of description specific embodiment
, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more relevant listed items
Any and all combinations.
Referring to Fig. 1, in implementing at wherein one, a kind of wake-up circuit 10, including nor gate unit U2 and switch S1, institute
The first input end of the first end 100 and the nor gate unit U2 of stating switch S1 is used to connect power supply, the switch S1's
Second end 200 for being grounded, the movable end 300 of the switch S1 be flexibly connected the switch first end 100 and the switch
Second end 200, the movable end 300 of the switch connect with the second input terminal of the nor gate unit U2.
Specifically, the movable end of switch, first end and second end are respectively three contacts switched, and movable end is for living
Dynamic to connect other two contact, when movable end is connect with first end, the circuit between movable end and first end is connected, movable end
When connecting with second end, the circuit between movable end and second end is connected.
In the present embodiment, the first end of nor gate unit U2 and the first end of switch are connected to power supply, and the switched
Two ends ground connection, is connected by switch S1 AND OR NOT gate unit U2, and when switch S1 state changes, the movable end 300 of switch S1 divides
There is not an of short duration connection with first end 100 and second end 200, using switch S1 this of short duration short-circuit process, in conjunction with
Nor gate, no matter how switch S1 acts, and the low rear high pulse of an elder generation can all occurs, thus by waking up CPU.
In implementing at wherein one, the switch S1 is short circuit type microswitch, and so-called short circuit type microswitch S1 refers to,
When the microswitch state changes, for example, when movable end 300 switches to second end 200 by first end 100, movable end 300 with
In the case that first end 100 not yet disconnects, movable end 300 and the second end 200 of short circuit type microswitch S1 will be connected first,
After the movable end 300 of short circuit type microswitch S1 is connect with second end 200, the movable end 300 of short circuit type microswitch S1 will
It is disconnected with first end 100；Conversely, when movable end 300 switches to first end 100 by second end 200, in movable end 300 and
Before two ends 200 not yet disconnect, movable end 300 is connect first with first end 100, after movable end 300 is connect with first end 100,
300 ability of movable end is disconnected with second end 200.That is, short circuit type microswitch S1 carry out switch state switching when, meeting
There is the short circuit in short-term of movable end 300, first end 100 and second end 200, that is to say, that in handoff procedure, movable end
300 exist simultaneously be connected respectively with first end 100 and second end 200, have an of short duration short-circuit process, in this way, in conjunction with or
The input of non-gate cell, it will so that nor gate unit exports a rising pulses from low to high.In implementing at wherein one,
The short circuit type microswitch S1 movement changes, i.e., the described short circuit type microswitch S1 state changes, and the short circuit type fine motion is opened
The movable end 300 for closing S1 is connect with the first end 100 of the short circuit type microswitch S1 and second end 200 respectively.
In one of the embodiments, the short circuit type microswitch S1 in the closure state, the short circuit type fine motion
The movable end 300 of switch S1 is connect with the first end 100 of the short circuit type microswitch S1, the short circuit type microswitch S1's
The second end 200 of movable end 300 and the short circuit type microswitch S1 disconnect, then the first input end of the nor gate unit U2
Input high level, the second input terminal input low level of the nor gate unit, therefore the output end of the nor gate unit exports
Low level.When the short circuit type microswitch S1 is in an off state, the movable end 300 of the short circuit type microswitch S1 and institute
The first end 100 for stating short circuit type microswitch S1 disconnects, the movable end 300 and the short circuit type of the short circuit type microswitch S1
The second end 200 of microswitch S1 connects, the first input end input high level of the nor gate unit U2, the nor gate list
The second input terminal input high level of first U2, therefore the output end of the nor gate unit U2 exports low level.The short circuit type is micro-
When dynamic switch S1 is in short-circuit condition, the movable end 300 of the short circuit type microswitch S1 is opened with the short circuit type fine motion respectively
Close S1 first end 100 and second end 200 connect, the first input end input low level of the nor gate unit U2, it is described or
Second input terminal input low level of non-gate cell, therefore the output end of the nor gate unit U2 exports high level.Therefore, described
Short circuit type microswitch S1 is in closing or opening state, and the output end of the nor gate unit U2 all exports low level, described
When short circuit type microswitch S1 short circuit, the output end of the nor gate unit U2 exports high level, that is to say, that the short circuit type
Microswitch S1 state changes, i.e., during the described short circuit type microswitch S1 is closed into disconnection or is disconnected to closure,
It is low rear high will to there is an elder generation, the pulse being then lower again.
As shown in Figure 1, wake-up circuit further includes resistance R1 in implementing at wherein one, the first end of the switch and
The first input end of the nor gate is connect with the first end of the resistance R1 respectively, and the second end of the resistance R1 is for connecting
Power supply.In the present embodiment, the first end of nor gate unit U2 and the first end of switch are connected to power supply by resistance R1.Into one
Step, for the second end 200 of the switch S1 for being grounded, the movable end 300 of the switch S1 is flexibly connected the switch S1's
The second end 200 of first end 100 and the switch S1, the of the movable end 300 of the switch S1 and the nor gate unit U2
The connection of two input terminals.Resistance R1 plays partial pressure in circuit, to protect circuit.For example, resistance R1 is 47 κ Ω, make voltage
Size meet the needs of each element, voltage is crossed conference and is directly resulted in component wear, its service life, too small possibility can be reduced
It will not directly damage, but its cisco unity malfunction, or even not work, so resistance R1 plays partial pressure, to protect circuit.
In implementing at wherein one, which is characterized in that wake-up circuit further includes processing unit U1, the nor gate unit U2
Output end connect with the processing unit U1, for example, the processing unit U1 be CPU (Central Processing
Unit), in digital circuit, digital level becomes (moment) at that moment of high level (digital " 1 ") from low level (digital " 0 ")
It is called rising edge.Otherwise it is failing edge.Only have digital level from low electricity after CPU (Central Processing Unit) suspend mode
Flat (digital " 0 "), which becomes high level (digital " 1 "), can wake up CPU (Central Processing Unit).Otherwise it can not call out
It wakes up.The short circuit type microswitch S1 state changes, can all occur an elder generation it is low after high, the pulse being then lower again, i.e.,
Rising edge signal can be issued and wake up CPU (Central Processing Unit).
In implementing at wherein one, which is characterized in that the nor gate unit U2 is SN74AUP1G02 model chip,
First pin of SN74AUP1G02 chip is connect with the first end of resistance R1 and the first end of the switch 100 respectively,
Second pin of SN74AUP1G02 chip is connect with the movable end 300 of the switch, the third pin of SN74AUP1G02 chip
For being grounded, the 4th pin of SN74AUP1G02 chip is connect with the processing unit U1, and the 5th of SN74AUP1G02 chip the
For pin for connecting to power supply, the nor gate unit U2 output low and high level controls the state of the processing unit.
In implementing at wherein one, the short circuit type microswitch S1 includes drive rod and movable plate, and the drive rod drives
Dynamic movable plate connects the contact of the short circuit type microswitch, in wherein one implementation, the short circuit type microswitch S1 packet
Drive rod, movable plate, the first contact piece, the second contact piece and third contact piece are included, the drive rod activity is connected to movable plate,
The movable plate is metal clips, and the drive rod connects the short circuit type fine motion by movable plate for driving movable plate to move
The contact of switch, the contact of short circuit type microswitch include the first contact piece, the second contact piece and third contact piece.It is described movable
Piece is metallic conductor, and the first contact piece, the second contact piece and third contact piece are metallic conductor, in the present embodiment, the first touching
Spot film is the first end of short circuit type microswitch, the second end of the second contact piece short circuit type microswitch, third contact piece short circuit
The movable end of type microswitch, third contact piece are connect with the second input terminal of the nor gate unit, the first contact piece and
Two contact pieces are located at the two sides of third contact piece, and switch original state is closure, movable plate respectively with movable end and first
It end in contact and is disconnected with second end, when switch closed condition switches off state, movable plate is sliding along the direction close to second end
Dynamic, switching is divided into two processes, first, the movable plate not yet disconnects first end and contact second end；Second, described can
When movable plate slides into final position, movable plate is disconnected with movable end and the second end in contact and with the first end.Conversely, switch is just
Beginning state is to disconnect, and movable plate is disconnected with movable end and the second end in contact and with first end respectively, when switch off state switches
When closed state, movable plate is slided along the direction close to first end, and switching is divided into two processes, first, the movable plate
Not yet disconnect second end and contact first end；Second, when the movable plate slides into final position, movable plate and movable end and the
End thereof contacts and with the second end disconnect.
In order to enable movable plate sliding is more steady, in one embodiment, short circuit type microswitch is provided with guide rail, this is led
Rail is insulating guide rail, and one embodiment is that the guide rail is plastic guide rail, and movable plate is slideably positioned on guide rail, one embodiment
It is that guide rail offers guide groove, the guide groove has type tee section, and movable plate is provided with sliding part, and sliding part has convex shape
Section, and sliding part is slideably positioned in guide groove, since guide rail is made of the plastics of isolation material, enable guide rail with it is movable
It insulate between piece, avoids short circuit, and by the guidance of guide groove, so that movable plate movement is more steady, and leading by convex shape
The buckle of slot, effectively avoids movable plate from slipping.
In one embodiment, there are two arc convex, the arc convex is disposed in proximity to described for the side wall setting of guide groove
The position of first contact piece and second contact piece, the arc convex are connected to the movable plate, specifically, guide groove
An arc convex is arranged close to the position of the first contact piece in side wall, and the side wall of guide groove is another close to the setting of the position of the first contact piece
Arc convex, one embodiment are that the arc convex has arcwall face, and arcwall face activity is connected to movable plate.In this way, movable
Piece is along guide groove movement to both ends, when connecting with the first contact piece or the second contact piece, the other side of arc convex and guide groove
Side wall jointly clamps movable plate, so that movable plate is clamped, and then effectively movable plate is avoided to be displaced, avoids short circuit type micro-
The mistake switching of the state of dynamic switch.
In implementing at wherein one, a kind of intelligent wireless pressing plate, including any of the above-described wake-up circuit as described in the examples.
For example, a kind of intelligent wireless pressing plate includes switch S1, nor gate unit U2 and processing unit U1, the first end of the switch S1
The first input end of the 100 and nor gate unit U2 is for connecting power supply, and the second end 200 of the switch S1 is for connecing
Ground, the movable end 300 of the switch S1 are flexibly connected the first end 100 of the switch S1 and the second end 200 of the switch S1,
The movable end 300 of the switch S1 is connect with the second input terminal of the nor gate unit U2, and the nor gate unit U2's is defeated
Outlet is connect with the processing unit U1, for example, the processing unit is CPU (Central Processing Unit), it is described
Switch S1 is short circuit type microswitch, and the short circuit type microswitch state changes, and the low rear height of an elder generation can all occurs, so
The pulse being lower again afterwards can issue rising edge signal and wake up CPU (Central Processing Unit), therefore, wirelessly
Intelligent pressure plate needs to transmit complete data after immediately enter dormant state to save power consumption, after CPU enters dormant state, if
Pressing plate state change is encountered, the CPU of suspend mode can be waken up immediately, send backstage main website for pressing plate status data.
Refer to table one and table two, in table one, pressing plate original state is to exit, at this point, the movable end of switch S1 and second
End is in connected state, and movable end is in an off state with first end, and the signal of the second input terminal input of nor gate unit is
The signal of low level L, first input end input are high level H, and nor gate unit exports low level L at this time.When pressing plate is by exiting
When state switches to investment state, movable end and first end and the of short duration short circuit of second end, i.e. movable end and first end and the
Two ends are also turned on, and the input signal of the first input end of nor gate unit and the second input terminal is low level L, in this way,
The output of nor gate unit is high level, so that nor gate unit outputs a pulse from low to high, CPU is called out in realization
It wakes up.Then, pressing plate is in investment state, and the movable end of switch S1 is connected to first end, and movable end and second end disconnect, nor gate
The signal of the first input end input of unit is high level H, and the signal of the second input terminal input is high level H, nor gate unit
Low level L is exported at this time.
One pressing plate of table switches to investment by exiting
In table two, pressing plate original state is investment, at this point, the movable end of switch S1 and first end are in connected state, it is living
Moved end is in an off state with second end, and the signal of the first input end input of nor gate unit is high level H, the second input terminal
The signal of input is high level H, and nor gate unit exports low level L at this time.When pressing plate switches to the state of exiting by investment state
When, movable end and first end and the of short duration short circuit of second end, i.e. movable end are also turned on first end and second end, nor gate
The input signal of the first input end of unit and the second input terminal is low level L, in this way, the output of nor gate unit is height
Level H realizes the wake-up to CPU so that nor gate unit outputs a pulse from low to high.Then, pressing plate is in and moves back
It does well, the movable end of switch S1 is connected to second end, and movable end and first end disconnect, and the second input terminal of nor gate unit is defeated
The signal entered is low level L, and the signal of first input end input is high level H, and nor gate unit exports low level L at this time.
Two pressing plate of table is exited by putting into switch to
By table one and table two it is found that when the short circuit type microswitch state changes, i.e., the described short circuit type fine motion
Close the switch during disconnecting or being disconnected to closure, can all occur an elder generation it is low after high, the pulse being then lower again so that
The state of intelligent wireless pressing plate, which is either switched to from investment, to be exited, or switches to investment from exiting, and will all wake up CPU.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.It should be noted that " in an embodiment ", " example of the application
Such as ", " for another example ", it is intended to the application is illustrated, rather than for limiting the application.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (6)
1. a kind of wake-up circuit characterized by comprising nor gate unit and switch, the first end of the switch and described
The first input end of nor gate unit is for connecting power supply, and the second end of the switch is for being grounded, the movable end of the switch
It is flexibly connected the first end of the switch and the second end of the switch, the movable end of the switch and the nor gate unit
The connection of second input terminal.
2. wake-up circuit according to claim 1, which is characterized in that the switch is short circuit type microswitch.
3. wake-up circuit according to claim 1, which is characterized in that further include resistance R1, the first end of the switch with
And the first input end of the nor gate is connect with the first end of the resistance R1 respectively, the second end of the resistance R1 is for connecting
Connect power supply.
4. wake-up circuit according to claim 1, which is characterized in that it further include processing unit, the nor gate unit
Output end is connect with the processing unit.
5. the intelligent wireless pressing plate wake-up circuit according to claim 1, which is characterized in that the nor gate unit
For SN74AUP1G02 model chip.
6. a kind of intelligent wireless pressing plate, which is characterized in that including wake-up circuit described in claim 1 to 5 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811085824.8A CN108983936A (en) | 2018-09-18 | 2018-09-18 | Intelligent wireless pressing plate wake-up circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811085824.8A CN108983936A (en) | 2018-09-18 | 2018-09-18 | Intelligent wireless pressing plate wake-up circuit |
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| Publication Number | Publication Date |
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| CN108983936A true CN108983936A (en) | 2018-12-11 |
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| CN201811085824.8A Pending CN108983936A (en) | 2018-09-18 | 2018-09-18 | Intelligent wireless pressing plate wake-up circuit |
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Citations (8)
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| CA1286397C (en) * | 1985-10-17 | 1991-07-16 | Jan S. Wesolowski | Time base corrector memory arrangement and memory control |
| US20060176155A1 (en) * | 2005-02-05 | 2006-08-10 | Neotec Semiconductor Ltd. | Wake-up circuit |
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| US20170149427A1 (en) * | 2015-11-24 | 2017-05-25 | Intel Corporation | APPARATUS AND METHOD FOR REDUCING di/dt DURING POWER WAKE-UP |
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| CN208873108U (en) * | 2018-09-18 | 2019-05-17 | 广州供电局有限公司 | Intelligent wireless pressing plate wake-up circuit |
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2018
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| CA1286397C (en) * | 1985-10-17 | 1991-07-16 | Jan S. Wesolowski | Time base corrector memory arrangement and memory control |
| US20060176155A1 (en) * | 2005-02-05 | 2006-08-10 | Neotec Semiconductor Ltd. | Wake-up circuit |
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| US20170149427A1 (en) * | 2015-11-24 | 2017-05-25 | Intel Corporation | APPARATUS AND METHOD FOR REDUCING di/dt DURING POWER WAKE-UP |
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