CN102510121A - Power failure processing device and method - Google Patents
Power failure processing device and method Download PDFInfo
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- CN102510121A CN102510121A CN2011103274531A CN201110327453A CN102510121A CN 102510121 A CN102510121 A CN 102510121A CN 2011103274531 A CN2011103274531 A CN 2011103274531A CN 201110327453 A CN201110327453 A CN 201110327453A CN 102510121 A CN102510121 A CN 102510121A
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Abstract
The invention discloses a power failure processing device and a power failure processing method and belongs to the field of electronics and communication. When an input voltage of powered equipment cannot meet a requirement for normal operation, a combining circuit switches power which is supplied to the powered equipment from an external power supply to a button battery which can store more energy, so that the powered equipment can accomplish necessary information sending operation when the external power supply is under-voltage, and the problem that an electrolytic capacitor stores less energy is solved. The button battery has a small size, so that the structural space of the powered equipment can be saved. Moreover, according to the invention, the power supply time of the button battery is controlled by a timing power supply circuit, and the electric energy of the button battery can be effectively utilized.
Description
Technical field
The present invention relates to the electronics and the communications field, particularly a kind of power down process device and method.
Background technology
XDSL is all kinds DSL (Digital Subscribe Line; Digital subscriber line) general name; Comprise ADSL (Asymmetric Digital Subscriber Line; The ADSL), VDSL (Very-high-data-rateDigital Subscriber Line; Very High Speed Digital Subscriber Line) and G.SHDSL (Single-pair High-speedDigital Subscriber Line, single-line high speed digital subscriber line) etc., the existing copper cash resource of xDSL techniques make use (for example telephone wire) provides network insertion service cheaply at a high speed for terminal client.XPON is all kinds PON (Passive Optical Network; Passive optical-fiber network) general name of technology; Comprise GPON (Gigabit-Capable Passive Optical Network; Gigabit-capable Passive Optical Network), EPON (Ethernet Passive Optical Network, Ethernet passive optical network) etc., the xPON technology provides at a high speed, grows the optical-fiber network access service of distance for the user.Alarm for power-off (Dying gasp) is as CPE (the Customer Premises Equipment of xDSL and xPON; Customer premises equipment, CPE) function of end; The input voltage of CPE system is meant: when can't satisfy system's operate as normal; System can trigger CPE and send out an alarm for power-off signal automatically to DSLAM (Digital Subscriber Line Access Multiplexer; Digital Subscriber Line Access Multiplexer), notice DSLAM does not cause the cpe end can't operate as normal because voltage does not satisfy need of work, and DSLAM discharges that passage of arranging to give CPE.
The Dying gasp of CPE system implementation method is at present: chip manufacturer can design a Dying gasp performance module in chip in design chips, and this module realizes Dying gasp function through monitoring external power source input voltage.Must operate as normal because the normal prerequisite of using of this function is a chip; And to send the signal of certain hour length to DSLAM; So at Dying gasp signal in effective time; The various power source voltage of confession chip operate as normal can not be less than the desired minimum of this chip; Owing to be to utilize some electric energy of system's storage after the power down to send last state information by CPE, the CPE system will accomplish and send power down information to the DSLAM end and operate this moment, and the energy that then requires energy-storage travelling wave tube to store satisfies the consumption (energy consumption=power consumption * time) of CPE in this section period.
In realizing process of the present invention, when the inventor finds that prior art exists the cpe end of following problem: xDSL, xPON to realize the dying-gasp function at least, adopt electrochemical capacitor as storage capacitor; But under the plurality of applications occasion; Because CPE system loss-rate is bigger, structure space is less, thereby causes in order to realize a fairly large number of storage capacitor of Dying-gasp function needs; Can increase cost; And power consumption greatly then needs bigger capacity storage capacitor, and the capacity of storage capacitor often has much relations with volume, and the use of large bulk capacitance will cause the structure space of CPE system nervous.
Summary of the invention
The cost that uses capacitance energy storage to cause when solving existing power down process to power receiving equipment increases the problem with the structure space anxiety, and the embodiment of the invention provides a kind of power down process device and method.Said technical scheme is following:
A kind of power down process device, said device comprises: alarm for power-off testing circuit, charging circuit, timing power supply circuit, button cell and close the road circuit;
Wherein, One end of said alarm for power-off testing circuit is connected with external power source; The other end of said alarm for power-off testing circuit is connected with power receiving equipment; Be used for monitoring in real time the voltage of said external power source, when the voltage of said external power source is lower than preset threshold voltage, make said power receiving equipment produce the alarm for power-off signal;
One end of said charging circuit links to each other with said external power source, and the other end of said charging circuit links to each other with the positive pole of said button cell, is used to use said external power source to give said button cell charging;
One end of said timing power supply circuit is connected with the positive pole of said button cell; The other end of said timing power supply circuit is connected with the said first input end that closes the road circuit; Be used for when the voltage of said external power source is lower than preset threshold voltage, control said button cell and close the time that the road circuit provides the electric current input to said;
The positive pole of said button cell is connected with said timing power supply circuit with said charging circuit; The other end ground connection of said button cell is used for when the voltage of said external power source is lower than preset threshold voltage, to the said road circuit that closes the electric current input being provided through said timing power supply circuit;
Said second input that closes the road circuit is connected with said external power source; The said first input end that closes the road circuit is connected with said timing power supply circuit; The said output that closes the road circuit links to each other with said power receiving equipment, is used for the electric current of said external power source or the input of said timing power supply circuit is offered said power receiving equipment.
A kind of power down process method, said method comprises:
When the voltage of external power source was lower than preset threshold voltage, the alarm for power-off testing circuit made power receiving equipment produce the alarm for power-off signal;
Opening timing power supply circuits, button cell provide the electric current input to closing the road circuit in the preset timing of said timing power supply circuit control, so that the said road circuit that closes is that said power receiving equipment provides electric energy.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is: when the voltage input of power receiving equipment can not be satisfied operate as normal; Close the road circuit will for the power supply of power receiving equipment is switched to by external power source can the more button cell of energy storage; So that power receiving equipment can be accomplished necessary information transmission work when externally power source voltage is not enough, and solved the less problem of electrochemical capacitor energy storage, because the button cell volume is less; Can save the structure space of power receiving equipment; And in the present invention,, can effectively utilize the electric energy of button cell through the power-on time of timing power supply circuit control button cell.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of power down process device of providing in the embodiment of the invention 1;
Fig. 2 is first kind of structural representation of the timing power supply circuit in a kind of power down process device that provides in the embodiment of the invention 1;
Fig. 3 is second kind of structural representation of the timing power supply circuit in a kind of power down process device that provides in the embodiment of the invention 1;
Fig. 4 is the schematic flow sheet of a kind of power down process method of providing in the embodiment of the invention 2.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.
As shown in Figure 1, present embodiment 1 provides a kind of power down process device, and this device comprises: alarm for power-off testing circuit 1, charging circuit 2, timing power supply circuit 3, button cell 4 and close road circuit 5;
Wherein, One end of alarm for power-off testing circuit 1 is connected with external power source, and the other end of alarm for power-off testing circuit 1 is connected with power receiving equipment, is used for monitoring in real time the voltage of external power source; When the voltage of external power source is lower than preset threshold voltage, make power receiving equipment produce the alarm for power-off signal;
One end of charging circuit 2 links to each other with external power source, and the other end of charging circuit 2 links to each other with the positive pole of button cell 4, is used to use external power source to give button cell 4 chargings;
One end of timing power supply circuit 3 is connected with the positive pole of button cell 4; The other end of timing power supply circuit 3 is connected with the first input end that closes road circuit 5; Be used for when the voltage of external power source is lower than preset threshold voltage, control control button cell 4 provides the time of electric current input to closing road circuit 5;
The positive pole of button cell 4 is connected with timing power supply circuit 3 with charging circuit 2, and the other end ground connection of button cell 4 is used for when the voltage of external power source is lower than preset threshold voltage, to closing road circuit 5 the electric current input being provided through timing power supply circuit 3;
Second input that closes road circuit 5 is connected, closes road circuit 5 with external power source first input end is connected with timing power supply circuit 3; The output that closes road circuit 5 links to each other with power receiving equipment, is used for the electric current of external power source or 3 inputs of timing power supply circuit is offered power receiving equipment.
In the present embodiment, above-mentioned power receiving equipment comprises the CPE system.
Need to prove; The mode that alarm for power-off testing circuit 1 makes power receiving equipment produce the alarm for power-off signal comprises following mode at least: an end of alarm for power-off testing circuit 1 is connected with external power source; The real-time voltage of monitoring external power source, and give power receiving equipment through the other end output high level of self, (voltage of external power source is lower than preset threshold voltage when the voltage of external power source can not satisfy the required voltage of power receiving equipment operate as normal; When for example external power source outage and voltage are 0V); Because the reduction of voltage, transfer low level to the high level of power receiving equipment input, when power receiving equipment detect alarm for power-off testing circuit 1 be input as low level the time; Promptly produce the alarm for power-off signal, and send to the processor of power receiving equipment.
Further; As shown in Figure 2; Timing power supply circuit 3 comprises: and diode D1, first resistance R 1, second resistance R 2, capacitor C 1 and N type power field effect transistor Q1 (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET);
Wherein, The anode of diode D1 is connected with external power source; The negative electrode of diode D1 is connected with first resistance R 1; Be used for when the voltage of external power source is not less than preset threshold voltage, take the mode of unidirectional conducting that the electric current that external power source provides is inputed to capacitor C 1 through first resistance R 1, make capacitor C 1 storage of electrical energy;
One end of first resistance R 1 is connected with the negative electrode of diode D1, and the other end of first resistance R 1 is connected with capacitor C 1, is used to limit the size that external power source inputs to the electric current of capacitor C 1, and is excessive to prevent charging current, causes capacitor C 1 breakdown;
One end of capacitor C 1 is connected with first resistance R 1; The other end ground connection of capacitor C 1 is used for when the voltage of external power source is not less than preset threshold voltage, receives the electric current of external power source input; And be stored as electric energy; When the voltage of external power source is lower than preset threshold voltage, discharge electric energy, produce first electric current;
One end of second resistance R 2 is connected with the grid of first resistance R 1, N type power field effect transistor Q1; The other end ground connection of second resistance R 2; Be used for when the voltage of external power source is lower than preset threshold voltage; Receive first electric current, form N type power field effect transistor Q1 grid voltage, so that drain electrode and the source electrode conducting of N type power field effect transistor Q1;
The grid of N type power field effect transistor Q1 is connected with second resistance R 2; The drain electrode of N type power field effect transistor Q1 is connected with button cell 4; The source electrode of N type power field effect transistor Q1 with close road circuit 5 and be connected; Be used for when the drain electrode of N type power field effect transistor Q1 and source electrode conducting, make button cell 4 the electric current input is provided to closing road circuit 5.
The timing power supply circuit that regarding to above-mentioned Fig. 2 down provides describes, and is as shown in Figure 2 in the present embodiment, and what first electric current was concrete is current Ib, and this timing power supply circuit 2 utilizes and produces timing the discharge time of capacitor C 1.When the power receiving equipment operate as normal, external power source input is capacitor C 1 charging through diode D1, makes capacitor C 1 storage of electrical energy.This moment, N type power field effect transistor Q1 was in opening (i.e. drain electrode is in conducting state with source electrode); But, the external power source input current closes road circuit 2 because giving; Button cell 4 is in charged state simultaneously; So electric current I e is close to 0 (0V), electric current I e is the electric energy that 0 power receiving equipment can not consume button cell 4.
When the voltage of external power source can not be kept the operate as normal of power receiving equipment; Capacitor C 1 can be through the loop release current Ib (current Ib i.e. first electric current) of first resistance R 1, the 2nd R2 and N type power field effect transistor Q1; Current Ib is that N type power field effect transistor Q1 conducting provides necessary electric current; When current Ib drops to can not keep N type power field effect transistor Q1 conducting the time; The drain electrode of N type power field effect transistor Q1 and source electrode turn-off, thereby realize the timing power supply of 4 pairs of power receiving equipments of button cell.
Further, first resistance R 1, second resistance R 2 and capacitor C 1 also are used for through regulating the duration of first electric current, input to the time of closing road circuit 5 with the electric current of regulating button cell 4 and providing.
For example, 1 discharge time of change capacitor C through changing capacitor discharge loop parameter (capacity of capacitor C 1, the resistance of first resistance R 1 and second resistance R 2), thus reach needed timing.
Further, as shown in Figure 3, timing power supply circuit 3 comprises: resistance R 3 and N type power field effect transistor Q2;
Wherein, One end of resistance R 3 is connected with power receiving equipment; The other end of resistance R 3 is connected with the grid of N type power field effect transistor Q2; Be used for after power receiving equipment receives the alarm for power-off signal, receive the low level that power receiving equipment sends behind Preset Time, so that the drain electrode of N type power field effect transistor Q2 and the conducting of source electrode are disconnected;
The grid of N type power field effect transistor Q2 is connected with resistance R 3; The drain electrode of N type power field effect transistor Q2 is connected with button cell 4; The source electrode of N type power field effect transistor Q2 with close road circuit 5 and be connected; Be used for when the drain electrode of N type power field effect transistor Q2 and source electrode conducting; The electric current that makes button cell 4 provide inputs to and closes road circuit 5, when the conducting of the drain electrode of N type power field effect transistor Q2 and source electrode is disconnected, cuts off button cell 4 to closing the electric current input that road circuit 5 provides.
The timing power supply circuit that regarding to above-mentioned Fig. 3 down provides describes; In power receiving equipment, be provided with timer; This timer can be realized through programming; Can be implemented in when external power source can not be kept the operate as normal of power receiving equipment through this timer, in the preset time, supply power by button cell 4.
When the power receiving equipment operate as normal; The high level that the alarm for power-off testing circuit 1 that power receiving equipment receives sends; Be that the alarm for power-off signal is a disarmed state, what this moment, power receiving equipment sent to resistance R 3 is high level state, and N type power field effect transistor Q2 is in the opening (drain electrode and the source electrode that are N type power field effect transistor Q2 are conducting state) of acquiescence; But because external power source inputs to and closes road circuit 2; Button cell 4 is in charged state simultaneously, so electric current I e is close to 0, electric current I e is the electric energy that 0 power receiving equipment can not consume button cell 4.
When external power source can not satisfy the power receiving equipment operate as normal, power receiving equipment produced the alarm for power-off signal and gives processor, and power receiving equipment power supply simultaneously can switch to by button cell 4 power supplies.The processor of power receiving equipment receives that the alarm for power-off signal begins to start timer; Behind the timing of in reaching timer, presetting; Processor output switch controlled signal is on-off switching tube state (concrete in the present embodiment is output low level); Make drain electrode and the conducting between the source electrode of N type power field effect transistor Q2 break off, thereby make the power receiving equipment outage.
In timing power supply circuit implementation shown in Figure 3, through detecting the alarm for power-off signal, thereby triggered timer, after arriving the preset time, close the button cell power supply.This kind implementation can accomplish that timing can accurately be provided with, and is provided with flexibly, has made full use of system's existing resources, can extra increase cost.
Further, when charging circuit 2 also is used for charging voltage when button cell 4 is charged greater than preset charging voltage thresholding, break off charging circuit 2.
Wherein, in Fig. 2 and Fig. 3, that button cell 4 is concrete is power supply V1.
The present invention is through when the voltage input of power receiving equipment can not be satisfied operate as normal; Close the road circuit will for the power supply of power receiving equipment is switched to by external power source can the more button cell of energy storage; So that power receiving equipment can be accomplished necessary information transmission work when externally power source voltage is not enough, and solved the less problem of electrochemical capacitor energy storage, because the button cell volume is less; Can save the structure space of power receiving equipment; And in the present invention,, can effectively utilize the electric energy of button cell through the power-on time of timing power supply circuit control button cell.
Based on the power down process device that the foregoing description 1 is provided, as shown in Figure 4, present embodiment provides a kind of power down process method, and this method comprises the steps:
201, when the voltage of external power source is lower than preset threshold voltage, alarm for power-off testing circuit 1 makes power receiving equipment produce the alarm for power-off signal;
Before this step, this method also comprises:
Alarm for power-off testing circuit 1 is the voltage of monitoring external power source in real time, when the voltage of external power source is not less than preset threshold voltage, closes the electric current that road circuit 5 receives the external power source input, and be the power receiving equipment power supply.
Further, this method also comprises: external power source provides the electric current input to charging circuit 2, and charging circuit 2 is button cell 4 chargings.
202, the opening timing power supply circuits 3, and button cell 4 provides the electric current input to closing road circuit 5 in the preset timing of timing power supply circuit 3 controls, for power receiving equipment electric energy is provided so that close road circuit 5.
Need to prove that this step 202 specifically comprises two kinds of methods:
Circuit diagram as shown in Figure 2, timing power supply circuit 3 comprise diode D1, first resistance R 1, second resistance R 2, capacitor C 1 and N type power field effect transistor Q1, and method one specifically comprises:
202-1, when the voltage of external power source is lower than preset threshold voltage, the loop release current Ib that capacitor C 1 constitutes through first resistance R 1, second resistance R 2;
Drain electrode and source electrode that 202-2, current Ib are kept N type power field effect transistor Q1 continue conducting, and button cell 4 provides the electric current input to closing road circuit 5;
202-3, behind preset timing, current Ib drops to can not keep N type power field effect transistor Q1 conducting, the drain electrode of N type power field effect transistor Q1 is turn-offed with source electrode, button cell 4 stops to closing road circuit 5 electric current input being provided.
Need to prove; In method one; Current Ib can maintain N type power field effect transistor Q1 conducting in the preset timing; Mainly by first resistance R 1, the resistance of second resistance R 2 and the capacity decision of capacitor C 1, therefore, the duration of the resistance that can be through adjustment first resistance R 1, second resistance R 2 and the capacity regulating current Ib of capacitor C 1.
The circuit diagram that provides as shown in Figure 3, timing power supply circuit 3 comprise resistance R 3 and N type power field effect transistor Q2, and method two specifically comprises:
202-1 ', after timer that power receiving equipment produces alarm for power-off signal and power receiving equipment reaches preset timing, the grid of N type power field effect transistor Q2 receives the low level that power receiving equipment is carried;
Need to prove; When the external power source operate as normal; The high level that the alarm for power-off testing circuit 1 that the CPE system receives sends; Be that the alarm for power-off signal is a disarmed state, what this moment, power receiving equipment sent to resistance R 3 is high level state, and N type power field effect transistor Q2 is in the opening (drain electrode and the source electrode that are N type power field effect transistor Q2 are conducting state) of acquiescence.
The drain electrode of 202-2 ', N type power field effect transistor Q2 and the conducting between the source electrode are broken off, and button cell 4 stops to closing road circuit 5 the electric current input being provided.
The present invention is through when the voltage input of power receiving equipment can not be satisfied operate as normal; Close the road circuit will for the power supply of power receiving equipment is switched to by external power source can the more button cell of energy storage; So that power receiving equipment can be accomplished necessary information transmission work when externally power source voltage is not enough, and solved the less problem of electrochemical capacitor energy storage, because the button cell volume is less; Can save the structure space of power receiving equipment; And in the present invention,, can effectively utilize the electric energy of button cell through the power-on time of timing power supply circuit control button cell.
The all or part of step that one of ordinary skill in the art will appreciate that realization the foregoing description can be accomplished through hardware; Also can instruct relevant hardware to accomplish through program; Described program can be stored in a kind of computer-readable recording medium; The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a power down process device is characterized in that, said device comprises: alarm for power-off testing circuit, charging circuit, timing power supply circuit, button cell and close the road circuit;
Wherein, One end of said alarm for power-off testing circuit is connected with external power source; The other end of said alarm for power-off testing circuit is connected with power receiving equipment; Be used for monitoring in real time the voltage of said external power source, when the voltage of said external power source is lower than preset threshold voltage, make said power receiving equipment produce the alarm for power-off signal;
One end of said charging circuit links to each other with said external power source, and the other end of said charging circuit links to each other with the positive pole of said button cell, is used to use said external power source to give said button cell charging;
One end of said timing power supply circuit is connected with the positive pole of said button cell; The other end of said timing power supply circuit is connected with the said first input end that closes the road circuit; Be used for when the voltage of said external power source is lower than preset threshold voltage, control said button cell and close the time that the road circuit provides the electric current input to said;
The positive pole of said button cell is connected with said timing power supply circuit with said charging circuit; The other end ground connection of said button cell is used for when the voltage of said external power source is lower than preset threshold voltage, to the said road circuit that closes the electric current input being provided through said timing power supply circuit;
Said second input that closes the road circuit is connected with said external power source; The said first input end that closes the road circuit is connected with said timing power supply circuit; The said output that closes the road circuit links to each other with said power receiving equipment, is used for the electric current of said external power source or the input of said timing power supply circuit is offered said power receiving equipment.
2. device according to claim 1 is characterized in that, said timing power supply circuit comprises diode, first resistance, second resistance, electric capacity and N type power field effect transistor;
Wherein, The anode of said diode is connected with said external power source; The negative electrode of said diode is connected with said first resistance; When being used for voltage when said external power source and being not less than said preset threshold voltage, take the mode of unidirectional conducting that the electric current that said external power source provides is inputed to said electric capacity through said first resistance, make said capacitance stores electric energy;
One end of said first resistance is connected with the negative electrode of said diode, and the other end of said first resistance is connected with said electric capacity, is used to limit the size that said external power source inputs to the electric current of said electric capacity;
One end of said electric capacity is connected with said first resistance; The other end ground connection of said electric capacity when being used for voltage when said external power source and being not less than said preset threshold voltage, receives the electric current of said external power source input; And be stored as electric energy; When the voltage of said external power source is lower than said preset threshold voltage, discharge said electric energy, produce first electric current;
One end of said second resistance is connected with the grid of said first resistance, said N type power field effect transistor; The other end ground connection of said second resistance; When being used for voltage when said external power source and being lower than said preset threshold voltage; Receive said first electric current, form the grid voltage of said N type power field effect transistor, so that the drain electrode of said N type power field effect transistor and source electrode conducting;
The grid of said N type power field effect transistor is connected with said second resistance; The drain electrode of said N type power field effect transistor is connected with said button cell is anodal; The source electrode of said N type power field effect transistor is connected with the said road circuit that closes; Be used for when the drain electrode of said N type power field effect transistor and source electrode conducting, make said button cell to the said road circuit that closes the electric current input is provided through said timing power supply circuit.
3. device according to claim 1 is characterized in that, said timing power supply circuit comprises resistance and N type power field effect transistor;
Wherein, One end of said resistance is connected with said power receiving equipment; The other end of said resistance is connected with the grid of said N type power field effect transistor; Be used for after said power receiving equipment produces said alarm for power-off signal, receiving the low level that said power receiving equipment sends behind Preset Time, so that the drain electrode of said N type power field effect transistor and the conducting of source electrode are disconnected;
The grid of said N type power field effect transistor is connected with said resistance; The drain electrode of said N type power field effect transistor is connected with said button cell; The source electrode of said N type power field effect transistor is connected with the said road circuit that closes; Be used for when the drain electrode of said N type power field effect transistor and source electrode conducting; The electric current that said button cell is provided inputs to the said road circuit that closes, and when the conducting of the drain electrode of said N type power field effect transistor and source electrode is disconnected, cuts off said button cell and closes the electric current input that the road circuit provides through said timing power supply circuit to said.
4. according to any described device among the claim 1-3, it is characterized in that, when said charging circuit also is used for charging voltage when said button cell is charged greater than preset charging voltage thresholding, break off said charging circuit.
5. a power down process method is characterized in that, said method comprises:
When the voltage of external power source was lower than preset threshold voltage, the alarm for power-off testing circuit made power receiving equipment produce the alarm for power-off signal;
Opening timing power supply circuits, button cell provide the electric current input to closing the road circuit in the preset timing of said timing power supply circuit control, so that the said road circuit that closes is that said power receiving equipment provides electric energy.
6. method according to claim 5 is characterized in that, when said voltage when external power source was lower than preset threshold voltage, the alarm for power-off testing circuit produced before the alarm for power-off signal power receiving equipment, and said method also comprises:
The alarm for power-off testing circuit is the voltage of the said external power source of monitoring in real time, when the voltage of said external power source is not less than said preset threshold voltage, saidly closes the electric current that the road circuit receives said external power source input, and be that said power receiving equipment is supplied power.
7. according to claim 5 or 6 described methods, it is characterized in that when the voltage of said external power source was not less than said preset threshold voltage, said method also comprised:
Said external power source provides the electric current input to charging circuit, so that said charging circuit is said button cell charging.
8. according to any described method among the claim 5-7, it is characterized in that said timing power supply circuit comprises diode, first resistance, second resistance, electric capacity and N type power field effect transistor; Said button cell provides the electric current input to closing the road circuit in the preset timing of timing power supply circuit control, comprising:
When the voltage of said external power source was lower than preset threshold voltage, said electric capacity discharged first electric current through the loop that said first resistance, said second resistance constitute;
Drain electrode and source electrode that said first electric current is kept said N type power field effect transistor continue conducting, and said button cell provides the electric current input to the said road circuit that closes;
Behind said preset timing; Said first electric current drops to drain electrode and the source electrode conducting that can not keep said N type power field effect transistor; The drain electrode of said N type power field effect transistor and source electrode turn-off, and said button cell stops to the said road circuit that closes the electric current input being provided.
9. according to any described method among the claim 5-7; It is characterized in that; Said timing power supply circuit comprises resistance and N type power field effect transistor, and said button cell provides the electric current input to closing the road circuit in the preset timing of timing power supply circuit control, comprising:
After the timer of said power receiving equipment generation alarm for power-off signal and said power receiving equipment reached said preset timing, the grid of said N type power field effect transistor received the low level that said power receiving equipment is carried;
The drain electrode of said N type power field effect transistor and the conducting between the source electrode are broken off, and said button cell stops to the said road circuit that closes the electric current input being provided.
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| CN201110327453.1A CN102510121B (en) | 2011-10-25 | 2011-10-25 | Power failure processing device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108491059A (en) * | 2018-04-08 | 2018-09-04 | 普联技术有限公司 | A kind of adapter, control device and electronic equipment |
| WO2019095947A1 (en) * | 2017-11-16 | 2019-05-23 | 华为技术有限公司 | Power supply combining circuit, control method, and vehicle-mounted wireless communication terminal |
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| CN201063461Y (en) * | 2007-06-28 | 2008-05-21 | 中兴通讯股份有限公司 | Power-off alarm energy-accumulating circuit |
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| US20030035377A1 (en) * | 2001-08-16 | 2003-02-20 | Dong-Kweon Ju | Method and apparatus for performing dying gasp process for an external digital subscriber line communication terminal |
| US7302352B2 (en) * | 2005-07-15 | 2007-11-27 | Cisco Technology, Inc. | Method and system for providing dying gasp support for a network component |
| CN2882128Y (en) * | 2005-10-31 | 2007-03-21 | 飞博创（成都）科技有限公司 | Optical network equipment |
| CN201063461Y (en) * | 2007-06-28 | 2008-05-21 | 中兴通讯股份有限公司 | Power-off alarm energy-accumulating circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019095947A1 (en) * | 2017-11-16 | 2019-05-23 | 华为技术有限公司 | Power supply combining circuit, control method, and vehicle-mounted wireless communication terminal |
| CN109831018A (en) * | 2017-11-16 | 2019-05-31 | 华为终端有限公司 | Power supply Combining Circuit, control method and onboard wireless communicating terminal |
| CN109831018B (en) * | 2017-11-16 | 2022-09-16 | 华为终端有限公司 | Power supply combining circuit, control method and vehicle-mounted wireless communication terminal |
| CN108491059A (en) * | 2018-04-08 | 2018-09-04 | 普联技术有限公司 | A kind of adapter, control device and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102510121B (en) | 2014-01-08 |
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