CN105897240A - Single-button soft on-off circuit with hardware forced power-off function - Google Patents
Single-button soft on-off circuit with hardware forced power-off function Download PDFInfo
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- CN105897240A CN105897240A CN201610300186.1A CN201610300186A CN105897240A CN 105897240 A CN105897240 A CN 105897240A CN 201610300186 A CN201610300186 A CN 201610300186A CN 105897240 A CN105897240 A CN 105897240A
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- circuit
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- shutting down
- switching
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
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Abstract
The invention provides a single-button soft on-off circuit with a hardware forced power-off function. The single-button soft on-off circuit comprises an input power supply, an output power supply, an on-off working power generating circuit, a power switch, a switch driving circuit, a power-on trigger circuit, a hardware forced power-off circuit, a long delay circuit and an on-off signal generating circuit, wherein the input power is separately connected with the on-off working power generating circuit, the power switch and the switch driving circuit; the on-off working power generating circuit is separately connected with the power-on trigger circuit and the on-off signal generating circuit, the power switch is separately connected with the switch driving circuit and the output power supply, the switch driving circuit is separately connected with the power-on trigger circuit and the hardware forced power-off circuit, the power-on trigger circuit is connected to the long delay circuit, and the long delay circuit is connected to the hardware forced power-off circuit. The single-button soft on-off circuit effectively solves the problems of complex structure design and high design cost of the existing on-off circuit.
Description
Technical field
The present invention relates to a kind of on/off circuit, refer in particular to a kind of singly-bound possessing hardware forced shutdown function
Sofe Switch electromechanics road.
Background technology
On/off circuit is used to control electronic system electric power starting and the mechanism of closedown, be electronic system extremely
Close part and parcel.The application of current emerging intelligent artifact is more and more universal, and intelligent artifact is the most all equipped with
Product stand-by time, to meet Mobile solution, is therefore required the highest by battery, in order to be able to extend stand-by time,
Needing the structure space product is limited to place the biggest battery capacity, the design of internal battery becomes
More and more universal, this is because almost half volume of external battery is by occupied by its structural member, as
During really battery is built in intelligent artifact fuselage, it is possible to save the structural member volume of battery, thus identical
Or even on bigger volume, it is greatly improved the capacity of battery；The design of internal battery allows the capacity of battery really
Increased considerably, but also brought a new problem: if intelligent artifact is sent out in application process
Raw software system card machine or the situation of deadlock, owing to battery is built in fuselage, it is impossible to takes to dismantle battery
Way release, that how to carry out solve division operation？The most relatively backward solution has employing to hide
Armstrong's patent reset key in fuselage, hiding reset key is difficult to the most again touch, this way
User can be made to experience when using very poor.
The design majority of current existing patented technology or on the market intelligent artifact on/off circuit uses collection
Become circuit or power source special managing chip (PMU) etc. to realize, cause design cost the highest, also have
Using discrete device to realize, generally there is circuit structure complicated, reliability is relatively low, occupies too simultaneously
Many PCB space, use on the product that structure space is compact and have significant limitation.
Summary of the invention
The technical problem to be solved in the present invention, is to provide a kind of singly-bound possessing hardware forced shutdown function
Sofe Switch electromechanics road, it is possible to effective solution current intelligent artifact on/off circuit design structure excessively complexity,
The problem that design cost is high.
The present invention is achieved in that a kind of singly-bound Sofe Switch electromechanics possessing hardware forced shutdown function
Road, produces circuit, on and off switch, switch including input power, out-put supply, switching on and shutting down working power
Drive circuit, start trigger circuit, hardware circuit for forced shutdown, Long-time-delay circuit and switching on and shutting down signal
Producing circuit, described input power connects described switching on and shutting down working power respectively and produces circuit, on and off switch
And switch driving circuit；Described switching on and shutting down working power produces circuit and connects described start triggering electricity respectively
Road and switching on and shutting down signal generating circuit, described on and off switch connect respectively described switch driving circuit and
Out-put supply, described switch driving circuit connects described start respectively and triggers circuit and hardware forced shutdown
Circuit, described start triggers circuit and is connected to described Long-time-delay circuit, and described Long-time-delay circuit is connected to institute
State hardware circuit for forced shutdown.
Further, described Long-time-delay circuit includes resistance R8, electric capacity C1, audion Q4 and two
Pole pipe D3；Described resistance R8 one end is connected to described start and triggers circuit, the described resistance R8 other end
Connect one end of described electric capacity C1, the colelctor electrode of audion Q4 and hardware circuit for forced shutdown respectively,
The other end of described electric capacity C1 is connected to base stage and the negative electrode of diode D3 of described audion Q4,
The anode of described diode D3 and the grounded emitter of audion Q4.
Further, described switching on and shutting down working power produces circuit and includes a switching on and shutting down button K1, described
Input power is connected described switching on and shutting down signal generating circuit respectively by described switching on and shutting down button K1 and is opened
Machine triggers circuit.
Further, described switching on and shutting down signal generating circuit includes Digital I/O reference power source, switching on and shutting down signal
Outfan, resistance R3, resistance R4 and triode Q2；Described resistance R3 one end is connected to described numeral
Power supply, the described resistance R3 other end connecting valve machine signal output part and the current collection of audion Q2 respectively
Pole, the base stage of described audion Q2 is connected to described switching on and shutting down button K1, described three poles by resistance R4
The grounded emitter of pipe Q2.
Further, described switching on and shutting down working power generation circuit includes resistance R1, resistance R12, three poles
Pipe Q6 and switching on and shutting down button K2, described input power connects one end and three of described resistance R1 respectively
The colelctor electrode of pole pipe Q6, the other end of described resistance R1 connects one end and three of described resistance R12 respectively
The base stage of pole pipe Q6, the other end of described resistance R12 connect respectively described switching on and shutting down signal generating circuit with
And one end of switching on and shutting down button K2, the emitter stage of described audion Q6 is connected to described start and triggers circuit,
The other end ground connection of described switching on and shutting down button K2.
Further, described switching on and shutting down signal generating circuit includes Digital I/O reference power source, switching on and shutting down signal
Outfan, resistance R11 and diode D1, described Digital I/O reference power source is connected to the one of resistance R11
End, the other end of described resistance R11 connecting valve machine signal output part and the sun of diode D1 respectively
Pole, the negative electrode of described diode D1 is respectively connecting to one end and the resistance of described switching on and shutting down button K2
The other end of R12.
Further, described start triggering circuit includes resistance R5 and diode D2, described resistance R5
One end connect described switching on and shutting down working power and produce circuit, the other end of described resistance R5 is by described
Diode D2 connects described switch driving circuit and hardware circuit for forced shutdown respectively.
Further, described hardware circuit for forced shutdown includes resistance R9, audion Q5 and resistance R10,
Described resistance R9 one end connects described Long-time-delay circuit, and the described resistance R9 other end connects described three respectively
The base stage of pole pipe Q5 and one end of resistance R10, the colelctor electrode of described audion Q5 connects described respectively
Switching on and shutting down trigger circuit and switch driving circuit, the emitter stage of described audion Q5 and resistance R10
The equal ground connection of the other end.
It is an advantage of the current invention that: a kind of singly-bound Sofe Switch machine possessing hardware forced shutdown function of the present invention
Circuit, adds some discrete devices only with small capacitances and can realize normal delay circuit, and big without using
Capacity；And when off-mode, each several part power supply is thoroughly to turn off, and all circuit components are all
It is in open circuit state, on/off circuit power consumption hardly itself, reach to use mechanical switch to turn off equally
Effect, hardware forced shutdown function uses and is forced shutdown circuit power, it is possible to efficient solution is soft except intelligent artifact
Part system card machine or deadlock.
Accompanying drawing explanation
The present invention is further illustrated the most in conjunction with the embodiments.
Fig. 1 is the principle on a kind of singly-bound Sofe Switch electromechanics road possessing hardware forced shutdown function of the present invention
Figure.
Fig. 2 is the one on a kind of singly-bound Sofe Switch electromechanics road possessing hardware forced shutdown function of the present invention
The circuit diagram of detailed description of the invention.
Detailed description of the invention
Referring to shown in Fig. 1 and Fig. 2, the present invention possesses the singly-bound Sofe Switch machine of hardware forced shutdown function
Circuit, produces circuit, on and off switch including input power, out-put supply, switching on and shutting down working power, opens
Close drive circuit, start triggers circuit, hardware circuit for forced shutdown, Long-time-delay circuit and switching on and shutting down and believes
Number producing circuit, described input power connects described switching on and shutting down working power respectively and produces circuit, power supply and open
Close and switch driving circuit；Described switching on and shutting down working power produces circuit and connects described start triggering respectively
Circuit and switching on and shutting down signal generating circuit, described on and off switch connect respectively described switch driving circuit with
And out-put supply, described switch driving circuit connects described start respectively and triggers circuit and hardware pressure pass
Dynamo-electric road, described start triggers circuit and is connected to described Long-time-delay circuit, and described Long-time-delay circuit is connected to
Described hardware circuit for forced shutdown.
Described Long-time-delay circuit includes resistance R8, electric capacity C1, audion Q4 and diode D3；Institute
Stating resistance R8 one end and be connected to described start triggering circuit, the described resistance R8 other end connects institute respectively
State one end of electric capacity C1, the colelctor electrode of audion Q4 and hardware circuit for forced shutdown, described electric capacity
The other end of C1 is connected to base stage and the negative electrode of diode D3 of described audion Q4, described two poles
The anode of pipe D3 and the grounded emitter of audion Q4.
Described switching on and shutting down working power produces circuit and includes a switching on and shutting down button K1, and described input power leads to
Cross described switching on and shutting down button K1 and connect described switching on and shutting down signal generating circuit and start triggering electricity respectively
Road, described switching on and shutting down signal generating circuit includes Digital I/O reference power source, switching on and shutting down signal output part, electricity
Resistance R3, resistance R4 and triode Q2；Described resistance R3 one end is connected to described digital power, described
The resistance R3 other end connecting valve machine signal output part and the colelctor electrode of audion Q2 respectively, described three
The base stage of pole pipe Q2 is connected to described switching on and shutting down button K1, the transmitting of described audion Q2 by resistance R4
Pole ground connection.
Or, described switching on and shutting down working power produces circuit and includes resistance R1, resistance R12, audion Q6
And switching on and shutting down button K2, described input power connects one end and the audion of described resistance R1 respectively
The colelctor electrode of Q6, the other end of described resistance R1 connects one end and the audion of described resistance R12 respectively
The base stage of Q6, the other end of described resistance R12 connects described switching on and shutting down signal generating circuit respectively and opens
One end of shutdown button K2, the emitter stage of described audion Q6 is connected to described start and triggers circuit, institute
Stating the other end ground connection of switching on and shutting down button K2, described switching on and shutting down signal generating circuit includes Digital I/O reference
Power supply, switching on and shutting down signal output part, resistance R11 and diode D1, described Digital I/O reference power source is even
Be connected to one end of resistance R11, the other end of described resistance R11 connecting valve machine signal output part respectively with
And the anode of diode D1, the negative electrode of described diode D1 is respectively connecting to described switching on and shutting down button K2's
One end and the other end of resistance R12.
Described start triggers circuit and includes one end of resistance R5 and diode D2, described resistance R5 even
Connecing described switching on and shutting down working power and produce circuit, the other end of described resistance R5 passes through described diode
D2 connects described switch driving circuit and hardware circuit for forced shutdown respectively.
Described hardware circuit for forced shutdown includes resistance R9, audion Q5 and resistance R10, described electricity
Resistance R9 one end connects described Long-time-delay circuit, and the described resistance R9 other end connects described audion respectively
The base stage of Q5 and one end of resistance R10, the colelctor electrode of described audion Q5 connect respectively described in open
Shutdown triggers circuit and switch driving circuit, the emitter stage of described audion Q5 and resistance R10's
The equal ground connection of the other end.
As shown in Figure 1, the present invention is triggered circuit by 1 switching on and shutting down button K1, start, and power supply is opened
Close pipe Q1, switching on and shutting down signal generating circuit, switch driving circuit, switching on and shutting down working power produce circuit,
The often composition such as delay circuit, hard circuit for forced shutdown.In electronic product, on and off switch generally uses electricity
Son has switched, and electrical switch can be audion, metal-oxide-semiconductor, have the electricity that output enable controls
Source chip etc., the core of the present invention is through the opening and closing controlling this electrical switch to complete electricity
The startup and shutdown function of sub-product, present invention power supply switch tube Q1 in scheme describes uses
PMOS illustrates, but the scheme scope of application is not limited to use PMOS, it is also possible to be other band
Having switching function or have the electronic device that output enable controls, control mode can be according to the electricity used
Control signal is done suitably deformation by sub-device property, such as level, voltage conversion etc..The following is this programme work
Make the description of principle.
Start triggers circuit operation principle: start triggers circuit has resistance R5, diode D2 etc. to constitute.
When switching on and shutting down button K1 presses, switching on and shutting down working power produce circuit output by resistance R5, two
Pole pipe D2 produces voltage signal makes Q3 turn on to the base stage of the audion Q3 in switch driving circuit,
The grid of on and off switch PMOS Q1 is dragged down by Q3 colelctor electrode, makes Q1 turn on, input power VIN
It is conducting to out-put supply VOUT, completes start and trigger.
Switch driving circuit operation principle: switch driving circuit by resistance R2, resistance R6, resistance R7,
Triode Q3 etc. are constituted.In accompanying drawing 1, POWER_ON/nFF is the input control of switch driving circuit
Interface signal, this signal is produced by on/off circuit logic, generally by intelligent processor in intelligent artifact
Output I/O port drive control.When POWER_ON/nFF input high level, audion Q3 leads
Logical, the grid dragging down on and off switch PMOS Q1 maintains Q1 conducting；Work as POWER_ON/nFF
During input low level, audion Q3 pipe turns off, and resistance R3 draws high on and off switch PMOS Q1
Gate turn-off Q1.
Switching on and shutting down signal generating circuit operation principle: switching on and shutting down signal produces electric capacity by diode D1, electricity
Resistance R3 is constituted.In accompanying drawing 1, POWER_KEYIN is switching on and shutting down signals, in intelligent artifact generally
The input I/O port being available to intelligent processor does detection use.When switching on and shutting down button is pressed, by two poles
The POWER_KEYIN signal of pipe D1 output low level, when switching on and shutting down button unclamps, passes through resistance
R3 be pulled to digital circuit working power DVDD (the Digital I/O reference power source of processor, mainly for
The explanation allowing the output signal of this circuit and intelligent processor I/O interface level match and introduce), produce
The POWER_KEYIN signal of high level, this POWER_KEYIN signal is as in intelligent artifact
The switching on and shutting down detection signal of intelligent processor, intelligent processor can design detection logic, according to detecting
Signal condition do corresponding actions, as performed the start action such as maintenance, shutdown.
Switching on and shutting down working power produces circuit operation principle: switching on and shutting down working power produces electricity routing resistance
R1, resistance R4, triode Q2 etc. are constituted.When switching on and shutting down button is pressed, give three by resistance R4
Pole pipe Q2 emitter junction provides electric current to make audion Q2 turn on, and circuit input power VIN is given by Q2
Triggered circuit by start and Long-time-delay circuit provides working power.
Long-time-delay circuit operation principle: Long-time-delay circuit by resistance R8, electric capacity C1, audion Q4,
Diode D3 etc. are constituted.Wherein electric capacity C1, triode Q4 constitute capacitance multiplier circuit, utilize three poles
The Current amplifier effect of pipe, is equivalent to be exaggerated electric capacity C1 the about hFE (direct current of audion Q4
Amplification, hFE=direct current IC/IB) times, say, that the equivalent timing capacitor of this circuit is about
HFE*C1, therefore the charge constant ≈ R8*hFE*C1 of this circuit, so, apply extremely simple
Capacitance multiplier circuit achieve the long delay function in the present invention.When switching on and shutting down button is pressed, switch
Machine working power is produced the output of circuit and is charged this circuit equivalent timing capacitor by R7, this charged electrical
Pressure signal is as the input signal on hardware force switch electromechanics road.In accompanying drawing 1, the effect of diode D3 is
After trip switch machine button, provide discharge loop to electric capacity C1, allow Long-time-delay circuit electric capacity discharge back
Position.This discharge loop is by diode D3, electric capacity C1, resistance R9 and resistance R10 and three in accompanying drawing 1
The emitter junction parallel circuit etc. of level pipe Q5 is constituted.
Hardware circuit for forced shutdown operation principle: hardware force switch electromechanics routing resistance R9, resistance
R10, audion Q5 etc. are constituted.The charging voltage of Long-time-delay circuit output is carried by R9, R10 dividing potential drop
The emitter junction of supply audion Q5, when partial pressure value rises to the conducting voltage (about 0.7V) of triode Q5
Time neighbouring, triode Q5 turns on, and the audion Q3 pipe in switch driving circuit is turned off by Q5 colelctor electrode,
Thus power cutoff switching tube Q1, complete hardware forced shutdown.When intelligent artifact is favorite in application process
When outer generation software system card machine or deadlock, switching on and shutting down button forced shutdown can be pressed to solve by overlength
Remove.
More than respectively describe the operation principle of each circuit ingredient of the present invention, next describe
Whole circuit operation principle:
Software controls start: press switching on and shutting down button, and switching on and shutting down working power produces circuit output services electricity
Source triggers circuit to start, and start trigger circuit triggers switch driving circuit power-on switchs Q1, defeated
Enter power supply VIN and be conducting to out-put supply VOUT, complete start and trigger, now intelligent processor system
Starting working, intelligent processor detects that switching on and shutting down button presses (the low electricity of POWER_KEYIN signal
Flat) more than performing start maintenance (output high level to POWER_ON/nOFF), system during 0.5S
Having powered on short by soft start, otherwise, do not performed start and maintain, system just cannot complete start.
Software controls shutdown: open state presses switching on and shutting down button, and intelligent processor detects that switching on and shutting down are believed
When number producing circuit output low level (represent switching on and shutting down button down state) more than 2S, pass through UI
(liquid crystal, LED etc.) prompting user shuts down, and then user understands trip switch machine button, intelligence
Processor can detect that switching on and shutting down signal generating circuit output high level (represents that switching on and shutting down button unclamps shape
State), i.e. perform shutdown action (output low level to POWER_ON/nOFF), system power failure is complete
Grow up and press soft-off.
Hardware controls is shut down: open state presses switching on and shutting down button, is always maintained at pinning until exceeding long prolonging
Time circuit configuration time constant, Long-time-delay circuit trigger hardware circuit for forced shutdown work, power cutoff
Switch Q1, completes hardware forced shutdown.
It is on the practice processes being described above as in the embodiment of figure 2, by switching on and shutting down working power
Generation circuit and switching on and shutting down signal generating circuit do equivalence change and come, and circuit structure is more simplified.
Although the foregoing describing the detailed description of the invention of the present invention, but it is familiar with the technology people of the art
Member should be appreciated that our described specific embodiment is merely exemplary rather than for this
The restriction of bright scope, those of ordinary skill in the art are in the equivalence made according to the spirit of the present invention
Modify and change, all should contain in the scope of the claimed protection of the present invention.
Claims (8)
1. the singly-bound Sofe Switch electromechanics road possessing hardware forced shutdown function, it is characterised in that: bag
Include input power, out-put supply, switching on and shutting down working power generation circuit, on and off switch, switch drive electricity
Road, start are triggered circuit, hardware circuit for forced shutdown, Long-time-delay circuit and switching on and shutting down signal and are produced electricity
Road, described input power connects described switching on and shutting down working power respectively and produces circuit, on and off switch and open
Close drive circuit；Described switching on and shutting down working power produce circuit connect respectively described start trigger circuit and
Switching on and shutting down signal generating circuit, described on and off switch connects described switch driving circuit and output electricity respectively
Source, described switch driving circuit connects described start respectively and triggers circuit and hardware circuit for forced shutdown,
Described start triggers circuit and is connected to described Long-time-delay circuit, and described Long-time-delay circuit is connected to described hardware
Circuit for forced shutdown.
A kind of singly-bound Sofe Switch electromechanics possessing hardware forced shutdown function
Road, it is characterised in that: described Long-time-delay circuit include resistance R8, electric capacity C1, audion Q4 and
Diode D3；Described resistance R8 one end be connected to described start trigger circuit, described resistance R8 another
End connects one end of described electric capacity C1, the colelctor electrode of audion Q4 and hardware forced shutdown electricity respectively
Road, the other end of described electric capacity C1 is connected to the base stage of described audion Q4 and diode D3
Negative electrode, the anode of described diode D3 and the grounded emitter of audion Q4.
A kind of singly-bound Sofe Switch electromechanics possessing hardware forced shutdown function
Road, it is characterised in that: described switching on and shutting down working power produces circuit and includes a switching on and shutting down button K1, institute
State input power by described switching on and shutting down button K1 connect respectively described switching on and shutting down signal generating circuit and
Start triggers circuit.
A kind of singly-bound Sofe Switch electromechanics possessing hardware forced shutdown function
Road, it is characterised in that: described switching on and shutting down signal generating circuit includes Digital I/O reference power source, switching on and shutting down letter
Number outfan, resistance R3, resistance R4 and triode Q2；Described resistance R3 one end is connected to described number
Word power supply, the described resistance R3 other end connecting valve machine signal output part and the collection of audion Q2 respectively
Electrode, the base stage of described audion Q2 is connected to described switching on and shutting down button K1 by resistance R4, and described three
The grounded emitter of pole pipe Q2.
A kind of singly-bound Sofe Switch electromechanics possessing hardware forced shutdown function
Road, it is characterised in that: described switching on and shutting down working power produce circuit include resistance R1, resistance R12, three
Pole pipe Q6 and switching on and shutting down button K2, described input power connect respectively described resistance R1 one end and
The colelctor electrode of audion Q6, the other end of described resistance R1 connect respectively described resistance R12 one end and
The base stage of audion Q6, the other end of described resistance R12 connects described switching on and shutting down signal generating circuit respectively
And one end of switching on and shutting down button K2, the emitter stage of described audion Q6 is connected to described start and triggers electricity
Road, the other end ground connection of described switching on and shutting down button K2.
A kind of singly-bound Sofe Switch electromechanics possessing hardware forced shutdown function
Road, it is characterised in that: described switching on and shutting down signal generating circuit includes Digital I/O reference power source, switching on and shutting down letter
Number outfan, resistance R11 and diode D1, described Digital I/O reference power source is connected to resistance R11's
One end, the other end of described resistance R11 connecting valve machine signal output part and the sun of diode D1 respectively
Pole, the negative electrode of described diode D1 is respectively connecting to one end and the resistance of described switching on and shutting down button K2
The other end of R12.
A kind of singly-bound Sofe Switch electromechanics possessing hardware forced shutdown function
Road, it is characterised in that: described start triggers circuit and includes resistance R5 and diode D2, described resistance
One end of R5 connects described switching on and shutting down working power and produces circuit, and the other end of described resistance R5 passes through institute
State diode D2 and connect described switch driving circuit and hardware circuit for forced shutdown respectively.
A kind of singly-bound Sofe Switch electromechanics possessing hardware forced shutdown function
Road, it is characterised in that: described hardware circuit for forced shutdown includes resistance R9, audion Q5 and resistance
R10, described resistance R9 one end connects described Long-time-delay circuit, and the described resistance R9 other end connects institute respectively
Stating base stage and one end of resistance R10 of audion Q5, the colelctor electrode of described audion Q5 connects respectively
Described switching on and shutting down trigger circuit and switch driving circuit, the emitter stage of described audion Q5 and resistance
The equal ground connection of the other end of R10.
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| CN201610300186.1A CN105897240B (en) | 2016-05-09 | 2016-05-09 | A kind of singly-bound Sofe Switch electromechanics road having hardware forced shutdown function |
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| CN201610300186.1A CN105897240B (en) | 2016-05-09 | 2016-05-09 | A kind of singly-bound Sofe Switch electromechanics road having hardware forced shutdown function |
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| CN105897240B CN105897240B (en) | 2019-01-29 |
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Cited By (4)
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| CN106502151A (en) * | 2016-11-03 | 2017-03-15 | 武汉博激世纪科技有限公司 | A kind of band software lock control on/off circuit |
| CN109327215A (en) * | 2017-07-31 | 2019-02-12 | 国基电子（上海）有限公司 | switch control circuit |
| CN110429928A (en) * | 2019-07-30 | 2019-11-08 | 北京超维世纪科技有限公司 | A kind of on/off circuit of low-pressure system |
| WO2022036949A1 (en) * | 2020-08-17 | 2022-02-24 | 深圳市大疆创新科技有限公司 | Power supply circuit, mobile platform, and terminal device |
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