CN104007800A - Reset circuit, electronic device and reset method - Google Patents
Reset circuit, electronic device and reset method Download PDFInfo
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- CN104007800A CN104007800A CN201310061842.3A CN201310061842A CN104007800A CN 104007800 A CN104007800 A CN 104007800A CN 201310061842 A CN201310061842 A CN 201310061842A CN 104007800 A CN104007800 A CN 104007800A
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Abstract
The invention discloses a reset circuit, an electronic device and a reset method. The reset circuit comprises a main control module powered by a first power supply, a charge and discharge module powered by the first power supply, and a reset module respectively connected with the main control module and the charge and discharge module. At a first time when the first operating voltage supplied by the first power supply is reduced to a first threshold value, the control module is powered down, and the charge and discharge module is in a discharge state and supplies power to the reset module; at a second time after the first time, the charge and discharge module finishes the discharge, and the time period between the first time and the second time is less than the power supply period of the operating voltage; at a third time after the second time, when the first operating voltage is equal to or higher than a second threshold value, the charge and discharge module is in a charge process, the reset module is triggered to provide a first reset signal to the main control module to enable the main control module to reset according to the first reset signal, wherein the second threshold value is larger than the first threshold value .
Description
Technical field
The present invention relates to electronic technology field, relate in particular to a kind of reset circuit, electronic equipment and repositioning method.
Background technology
Along with scientific and technical development, electronic technology has also obtained development at full speed, and the kind of electronic product is also more and more, and people have also enjoyed the various facilities that development in science and technology brings.People can pass through various types of electronic equipments now, enjoy the comfortable life bringing along with development in science and technology.For example, TV has become an indispensable role in people's life, and people can watch TV play, news etc. TV programme by TV, alleviates the pressure that modern fast pace life brings.
At present, please refer to Fig. 1, Fig. 1 is the module diagram of the electronic device circuitry such as televisor in prior art, as shown in Figure 1, supply module 101 is connected with reseting module 103 with main control module 102 respectively, reseting module 103 is connected with main control module, main control module 102 specifically can comprise the main control chip of televisor, reseting module 103 specifically can comprise a reset circuit, by reseting module 103, to main control module 102, provide a reset signal, thereby make the main control module 102 can be according to reseting signal reset, then make the electronic equipments such as televisor can normally work when starting, in addition, the electronic equipments such as televisor also comprise a standby module 104, standby module 104 is for providing standby voltage during in standby mode at electronic equipments such as televisors.
In actual applications, the operating voltage that supply module 101 provides is normally for example, by alternating current (the civilian ac voltage standard of China: voltage 220V, frequency 50HZ) through overcommutation, step-down and come, therefore, in operating voltage, can inevitably there are some alternating components, these alternating components can greatly affect work and the life-span of electronic equipment, therefore for the normal operation of the electronic equipments such as televisor, also can filter out these alternating components with charge-discharge modules 105, also filter out the ripple in circuit, charge-discharge modules 105 specifically can comprise the electronic components such as electric capacity, resistance value in charge-discharge modules 104 generally can be larger, simultaneously, in order to guarantee the electrifying timing sequence of modules in the electronic equipments such as televisor, charge-discharge modules 105 is arranged between supply module 101 and reseting module 103.
But in the process of inventor's invention technical scheme in realizing the embodiment of the present invention, find that above-mentioned technology at least exists following technical matters:
In the prior art, as shown in Figure 1, when causing transient voltage to fall because of power network fluctuation, the main control module 102 meeting power down of the electronic equipments such as televisor, after voltage recovery, main control module 102 can recover to power on again, in the process of voltage decline abruptly and rise, reseting module 103 can cannot provide reset signal to main control module 102 because of the electric discharge of charge-discharge modules 105, so main control module 102 cannot be worked, the electronic equipments such as televisor can be in deadlock state, power button and remote control standby key all cannot respond user's operation, the power lead that needs user again to plug the electronic equipments such as televisor just can recover, therefore, in prior art there is the technical matters that cannot restart in the electronic equipment such as televisor when transient voltage falls.
Specifically, while dropping to 180V such as the alternating current voltage in China by 220V moment, the operating voltage that the supply module 101 of the electronic equipments such as televisor provides can reduce thereupon, main control module 102 meeting power down because operating voltage reduces, 105 of charge-discharge modules can start to discharge and power to reseting module 103, reseting module 103 is still in high level state, and when alternating current voltage gos up to 220V by 180V, main control module 102 re-powers, charge-discharge modules 105 starts charging again, reseting module 103 is still in high level state, and reseting module 103 need to could provide reset signal to main control module 102 from low level state is changed to high level state, so now reseting module 103 is due to always in high level state, cannot provide reset signal to main control module 102, main control module 102 after re-powering because cannot obtain reset signal, so cannot carry out electrification reset This move, also just cannot normally start working, thereby the electronic equipments such as televisor can be in deadlock state, power button and remote control standby key all cannot respond user's operation, the power lead that needs user again to plug the electronic equipments such as televisor just can recover.
Summary of the invention
The embodiment of the present invention, by a kind of reset circuit, electronic equipment and repositioning method are provided, have solved the electronic equipment such as televisor in prior art and when transient voltage falls, has had the technical matters that cannot restart.
The embodiment of the present invention provides a kind of reset circuit, is applied in an electronic equipment, and described reset circuit comprises: main control module, obtains power supply from the first power supply; Charge-discharge modules, obtains power supply from described the first power supply; Reseting module, is connected with described main control module and described charge-discharge modules respectively; Wherein, the first operating voltage providing at described the first power supply is reduced to first after first threshold constantly, described main control module power down, and described charge-discharge modules is in discharge condition and give described reseting module power supply; In second moment after described first moment, described charge-discharge modules electric discharge finishes, and the time period between described first moment and described second moment is less than a power cycle of described the first operating voltage; In described the first operating voltage, be more than or equal to the 3rd moment after described second moment after Second Threshold, when described charge-discharge modules is in charging process, trigger described reseting module and provide the first reset signal to described main control module, make the described main control module can be according to described the first reseting signal reset, wherein, described Second Threshold is greater than described first threshold.
Alternatively, described charge-discharge modules is specially a capacitance module, and the capacitance of described capacitance module is less than the first preset value, makes the end of can discharging in a described power cycle of described capacitance module.
Alternatively, described main control module is specially a main control chip, and described main control chip comprises that a reset signal receives pin, and described reseting module receives pin with described reset signal and is connected.
Alternatively, the capacitance of described capacitance module is greater than the second preset value, makes to be less than a default ripple voltage value by the ripple voltage value of described reseting module.
The embodiment of the present invention also provides a kind of electronic equipment, comprising: casing; Electric supply installation, is arranged in described casing; Reset circuit as in the foregoing embodiment, is arranged in described casing, is connected with described electric supply installation.
The embodiment of the present invention also provides a kind of repositioning method on the other hand, be applied to an electronic equipment, described electronic equipment comprises a reset circuit, described reset circuit comprises main control module, charge-discharge modules and reseting module, described main control module obtains power supply from the first power supply, described charge-discharge modules obtains power supply from described the first power supply, described reseting module is connected with described main control module and described charge-discharge modules respectively, described method comprises: the first operating voltage providing at described the first power supply is reduced to first after first threshold constantly, described main control module power down, described charge-discharge modules is in discharge condition and give described reseting module electric discharge, in second moment after described first moment, described charge-discharge modules electric discharge finishes, and the time period between described first moment and described second moment is less than a power cycle of described the first operating voltage, in described the first operating voltage, be more than or equal to the 3rd moment after described second moment after Second Threshold, when described charge-discharge modules is in charging process, trigger described reseting module and provide the first reset signal to described main control module, make the described main control module can be according to described the first reseting signal reset, wherein, described Second Threshold is greater than described first threshold.
Alternatively, described charge-discharge modules is specially a capacitance module, and the capacitance of described capacitance module is less than the first preset value, makes the end of can discharging in a described power cycle of described capacitance module.
Alternatively, described main control module is specially a main control chip, and described main control chip comprises that a reset signal receives pin, and described reseting module receives pin with described reset signal and is connected.
Alternatively, the capacitance of described capacitance module is greater than the second preset value, makes to be less than a default ripple voltage value by the ripple voltage value of described reseting module.
The one or more technical schemes that provide in the embodiment of the present invention, at least have following technique effect or advantage:
1, due to the end of can discharging in a power cycle of the first operating voltage of the charge-discharge modules in the embodiment of the present invention, so the first operating voltage providing at the first power supply is reduced to first after first threshold constantly, main control module power down, charge-discharge modules is powered in discharge condition and to reseting module, second moment after first moment, charge-discharge modules electric discharge finishes, time period between first moment and second moment is less than a power cycle of the first operating voltage, and be more than or equal to the 3rd moment after second moment after Second Threshold in the first operating voltage, when charge-discharge modules is in charging process, trigger reseting module and provide the first reset signal to main control module, make the main control module can be according to the first reseting signal reset, and then make electronic equipment automatically realize and restarting, therefore solve in prior art the electronic equipments such as televisor and when transient voltage falls, had the technical matters that cannot restart.
2, owing to having solved the electronic equipment such as televisor in prior art, when falling, transient voltage there is the technical matters that cannot restart, so do not need power lead that user plugs the electronic equipments such as televisor again manually to restart televisor, the user who has then improved the electronic equipments such as televisor experiences.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the electronic equipment such as televisor in prior art;
The functional block diagram of the reset circuit that Fig. 2 provides for the embodiment of the present invention;
The process flow diagram of the repositioning method that Fig. 3 provides for the embodiment of the present invention;
The oscillogram of passing through oscillograph test reset circuit that Fig. 4 provides for the embodiment of the present invention;
The electrifying timing sequence figure of modules in the electronic equipment that Fig. 5 provides for the embodiment of the present invention;
The schematic diagram that the reseting module that Fig. 6 provides for the embodiment of the present invention is connected with main control module;
The functional block diagram of the electronic equipment that Fig. 7 provides for the embodiment of the present invention.
Embodiment
The embodiment of the present invention, by a kind of reset circuit, electronic equipment and repositioning method are provided, have solved the electronic equipment such as televisor in prior art and when transient voltage falls, has had the technical matters that cannot restart.
There is the technical matters that cannot restart for solving the electronic equipments such as above-mentioned televisor in the technical scheme in the embodiment of the present invention, general thought is as follows when transient voltage falls:
The embodiment of the present invention provides a kind of reset circuit, is applied in an electronic equipment, and this reset circuit can comprise: main control module, obtains power supply from the first power supply; Charge-discharge modules, obtains power supply from the first power supply; Reseting module, is connected with main control module and charge-discharge modules respectively; Wherein, the first operating voltage providing at the first power supply is reduced to first after first threshold constantly, main control module power down, and charge-discharge modules is powered in discharge condition and to reseting module; In second moment after first moment, charge-discharge modules electric discharge finishes, and the time period between first moment and second moment is less than a power cycle of the first operating voltage; In the first operating voltage, be more than or equal to the 3rd moment after second moment after Second Threshold, when charge-discharge modules is in charging process, trigger reseting module and provide the first reset signal to main control module, make the main control module can be according to the first reseting signal reset, and then make electronic equipment automatically realize and restarting, wherein, Second Threshold is greater than first threshold.
By above-mentioned part, can find out, due to the end of can discharging in a power cycle of the first operating voltage of the charge-discharge modules in the embodiment of the present invention, so the first operating voltage providing at the first power supply is reduced to first after first threshold constantly, main control module power down, charge-discharge modules is powered in discharge condition and to reseting module, second moment after first moment, charge-discharge modules electric discharge finishes, time period between first moment and second moment is less than a power cycle of the first operating voltage, and be more than or equal to the 3rd moment after second moment after Second Threshold in the first operating voltage, when charge-discharge modules is in charging process, trigger reseting module and provide the first reset signal to main control module, make the main control module can be according to the first reseting signal reset, and then make electronic equipment automatically realize and restarting, therefore solve in prior art the electronic equipments such as televisor and when transient voltage falls, had the technical matters that cannot restart.
Simultaneously, owing to having solved the electronic equipment such as televisor in prior art, when falling, transient voltage there is the technical matters that cannot restart, so do not need power lead that user plugs the electronic equipments such as televisor again manually to restart televisor, the user who has then improved the electronic equipments such as televisor experiences.
In order better to understand technique scheme, below in conjunction with Figure of description and concrete embodiment, technique scheme is described in detail.
Please refer to Fig. 2, Fig. 2 is the functional block diagram of the reset circuit that provides of the embodiment of the present invention, this reset circuit can be applied in an electronic equipment, in actual applications, this electronic equipment can be televisor, also can be other electronic equipments of the same type for example for display of computer etc., at this, do not limit.As shown in Figure 2, this reset circuit comprises: main control module 201, from the first power supply, obtain power supply, and can be specifically from the first power supply, to obtain power supply by the first power supply receiving end; Charge-discharge modules 202, obtains power supply from the first power supply, can be specifically from the first power supply, to obtain power supply by second source receiving end; Reseting module 203, is connected with main control module 201 and charge-discharge modules 202 respectively.
The embodiment of the present invention also provides a kind of repositioning method on the other hand, please refer to Fig. 3, and Fig. 3 is the process flow diagram of the repositioning method that provides of the embodiment of the present invention, and as shown in Figure 3, the method comprises:
S1: the first operating voltage providing at the first power supply is reduced to first after first threshold constantly, main control module power down, charge-discharge modules discharges in discharge condition and to reseting module;
S2: in second moment after first moment, charge-discharge modules electric discharge finishes, the time period between first moment and second moment is less than a power cycle of the first operating voltage;
S3: be more than or equal to the 3rd moment after second moment after Second Threshold in the first operating voltage, when charge-discharge modules is in charging process, trigger reseting module and provide the first reset signal to main control module, make the main control module can be according to the first reseting signal reset, wherein, Second Threshold is greater than first threshold.
The repositioning method that the embodiment of the present invention provides can be applied on the electronic equipment that comprises above-mentioned said reset circuit, in ensuing part, will take electronic equipment as televisor is example, in conjunction with Fig. 2 and Fig. 3, carries out at length describing for example.
Please also refer to Fig. 2 and Fig. 3, in step S1, the first operating voltage providing at the first power supply is reduced to first after first threshold constantly, main control module power down, charge-discharge modules discharges in discharge condition and to reseting module, specifically, can be when causing transient voltage to fall because of power network fluctuation, the first operating voltage that the first power supply provides has dropped to first threshold, cannot meet the normal work of main control module 201, thereby main control module 201 power down, charge-discharge modules 202 is owing to having stored certain electric weight before the first operating voltage is reduced to first threshold, so first constantly, charge-discharge modules 202 is in discharge condition and give reseting module 203 power supplies.
In actual applications, main control module 201 can be the main control chip of televisor, this main control chip can comprise that power pin and reset signal receive pin, the power pin of this main control chip can be the first power supply receiving end of main control chip, reseting module 203 receives pin with this reset signal and is connected, to provide reset signal to main control module 201.
In actual applications, main control module 201 can be that model is the SOC(System on Chip of MT5505, system level chip or SOC (system on a chip)) chip, in concrete application, also can be for example MT8222 chips etc. of other chips of the same type, certainly, can be also other chips that the technician under this area can use, at this, do not limit.
Charge-discharge modules 202 can be specifically a capacitance module, the capacitance of this capacitance module is less than the first preset value, make the end of can discharging of this capacitance module in a power cycle of the first operating voltage, while falling in first operating voltage moment, in a power cycle of the first operating voltage, charge-discharge modules 202 end of can discharging, thereby make after the first operating voltage is gone up, can be in the charging process of charge-discharge modules 202, trigger reseting module 203 and provide a reset signal to main control module 201, make the first reset signal that main control module 201 can provide according to reseting module 203 carry out reset, then make described electronic equipment can automatically realize and restarting when transient voltage falls.
By the introduction of the present embodiment, technician under this area is according to actual conditions, can be for the first preset value arranges suitable numerical value, thus make the end of can discharging of this capacitance module in a power cycle of the first operating voltage, at this, just repeated no more.
In the present embodiment, main control module 201 can be specifically MT5505 chip, charge-discharge modules 202 is specifically as follows a capacitance module, the capacitance of this capacitance module is specially 47 μ F, please refer to Fig. 4, the oscillogram of Fig. 4 for testing this reset circuit by oscillograph, external power source is the civilian alternating current of China's standard, the oscillogram of MT5505 chip is as shown in the first waveform, the waveform of standby module 204 is as shown in the second waveform, as can be seen from the figure, main control module 201 is in the first power down constantly, standby module 204 starts power down constantly second, reseting module 203 second constantly in low level state, time period between first moment and second moment is 14.2ms, be less than a power cycle 20ms of civilian alternating current, charge-discharge modules 202 end of can discharging in a power cycle, make reseting module 203 second constantly in low level state.
Under normal conditions, the power supply that the electronic equipments such as televisor use is all to be converted by alternating current, such as the standard of the civilian alternating current of China is: 220V, 50HZ, by rectification circuit and the change-over circuit of inside television, can say that alternating current is converted to the operable electric energy of module such as the main control module 201 of televisor, charge-discharge modules 202, reseting module 203.By the introduction of aforementioned part, the technician under this area can select suitable rectification circuit and change-over circuit according to actual conditions, thereby meets the demand of actual conditions, at this, has just repeated no more.
When causing transient voltage to fall because of power network fluctuation, while dropping to 180V such as external communication piezoelectric voltage by 220V moment, the voltage that the rectification circuit of televisor and change-over circuit provide also can decline thereupon and sharply, thereby make main control module 201 power down, and charge-discharge modules 202 has stored certain electric weight when externally alternating current voltage does not fall, so now charge-discharge modules 202 is initially located in discharge condition, and start to reseting module 203 power supplies.
In the present embodiment, when the first operating voltage is reduced to 180V by 220V, main control module 201 power down, first threshold can be set to 180V, in actual applications, according to the difference of the difference of main control module 201 and circuit, first threshold can be also other values, by the introduction of the present embodiment, technician under this area can be according to actual conditions, the first threshold of the first operating voltage is arranged to suitable numerical value, to meet the demand of actual conditions, at this, just repeated no more.
In step S2, second moment after first moment, when charge-discharge modules electric discharge finishes, specifically reseting module is in low level state,, it can be second moment after first moment, the end of having discharged of the charge-discharge modules 202 of televisor, reseting module 203 is due to power supply source, so second constantly simultaneously, reseting module 203 is in low level state, and the time period between first moment and second moment is less than a power cycle of the first operating voltage.
The civilian alternating current of China of take is example, a power cycle of civilian alternating current is 1S/50=20ms, as long as the capacitance of charge-discharge modules 202 is less than the first preset value, just can guarantee main control module 201 power down first constantly and second time period between constantly of finishing of charge-discharge modules 202 electric discharges be less than a power cycle of civilian alternating current, be also less than 20ms.
Certainly, in actual applications, by the introduction of the present embodiment, those skilled in the art can select other suitable electronic devices and components as charge-discharge modules according to actual conditions, to meet the demand of actual conditions, at this, has just repeated no more.
In step S3, the first operating voltage at the first power supply is more than or equal to the 3rd moment after second moment after Second Threshold, when charge-discharge modules is in charging process, trigger reseting module and provide the first reset signal to main control module, and then make electronic equipment automatically realize and restarting, specifically, can be that the voltage recovery of the first operating voltage of providing at the first power supply is in Second Threshold, main control module 201 powers on the 3rd constantly, charge-discharge modules 202 is initially located in charging process, and start to reseting module 203 power supplies, reseting module 203 can be subject to one section of lasting high level signal, thereby trigger reseting module 203 and provide the first reset signal to main control module 201, make the main control module can be according to the first reseting signal reset, thereby main control module 201 starts normal work, then make televisor automatically realize and restarting.
In actual applications, Second Threshold can be that main control module 201 can be according to the numerical value of the normal work of the first operating voltage, such as, in the present embodiment, Second Threshold can be 220V, in actual applications, according to the difference of the difference of main control module 201 and circuit, Second Threshold can be also other values, by the introduction of the present embodiment, technician under this area can be according to actual conditions, the Second Threshold of the first operating voltage is arranged to suitable numerical value, to meet the demand of actual conditions, at this, just repeated no more, certainly, narration by above-mentioned part is known, the Second Threshold of the first operating voltage is greater than first threshold.
In concrete application, the electronic equipments such as televisor also can comprise a standby module 204, are arranged between charge-discharge modules 202 and reseting module 202, for providing standby voltage to televisor at televisor during in holding state.
In order to guarantee televisor, when moving, protect interlock circuit, please refer to Fig. 5, Fig. 5 is the electrifying timing sequence figure of the modules of the electronic equipment that provides of the embodiment of the present invention, as shown in Figure 5, first standby module 204 need to power in the T1 time period, then be that main control module 201 powered in the T2 time period, but now main control module 201 is just in power-up state, also do not start normal work, and then some other modules that are televisor powered in the T3 time period, some I/O interfaces for example, power amplifier chips etc. module, then reseting module 203 was changed to after high level state by low level state in the T4 time period, to main control module 201, provide a reset signal, now main control module 201 is carried out homing action according to this reset signal, and then main control module 201 just starts normal work, after main control module 201 is carried out reset, televisor just starts normal work.
Please refer to Fig. 6, Fig. 6 is the schematic diagram that reseting module 203 that the embodiment of the present invention provides is connected with main control module 201, as shown in Figure 6, main control module 201 is specially MT5505 chip, MT5505 chip comprises that a power pin VCC and reset signal receive pin AE8, and MT5505 chip, by power pin VCC receiver voltage, receives pin AE8 by reset signal and obtains reset signal, thereby carry out, reset, make televisor start normal work.
Reseting module 203 is specifically as follows a reset circuit, and by the introduction of the present embodiment, the technician under this area can select suitable reset circuit according to actual conditions, to meet the demand of actual conditions, at this, has just repeated no more.
As mentioned above, in the present embodiment, due to main control module 201 power down first constantly and second time period constantly between of reseting module 203 in low level state be less than a power cycle of the first operating voltage, so after falling in first operating voltage moment, reseting module 203 can be because of the electric discharge of charge-discharge modules 202 always in high level state, and after can falling in first operating voltage moment thereupon in low level state, in the first operating voltage, go up to normal voltage, reseting module 204 is again in high level state, thereby can provide the first reset signal to main control module 201, make main control module 201 to carry out and to reset according to this first reset signal, and again start working, avoided user manually to go to plug the inconvenience of power lead, the user who has improved electronic equipment experiences.
Certainly, in concrete application, charge-discharge modules 202, is also that the capacitance of the capacitance module in the present embodiment need to be greater than the second preset value, makes to be less than a default ripple voltage value by the ripple voltage value of reseting module 203.
Because DC stable power supply is generally formed through links such as rectifying and voltage-stabilizings by AC power, so just inevitably in DC stabilization amount how much with some Alternating Components, this AC compounent being superimposed upon in DC stabilization amount is just referred to as ripple, ripple can affect work and the life-span of electronic equipment, therefore for the normal operation of the electronic equipments such as televisor, charge-discharge modules 202 is also the capacitance of the capacitance module in the present embodiment, need to be greater than the second preset value, make to be less than a default ripple voltage value by the ripple voltage value of reseting module 203.
Because the actual conditions of all types of electronic equipments are different, the corresponding default ripple voltage value of each electronic equipment is also different, by the introduction of the present embodiment, technician under this area can be according to actual conditions, the capacitance of capacitance module is set to suitable value, to guarantee normal operation and the life-span of electronic equipment, thereby meet the needs of actual conditions, at this, just repeated no more.
In actual applications, in general, the second preset value is less than the first preset value, the capacitance of capacitance module can be controlled in the scope between the second preset value and the first preset value, but may still exist the second preset value to be greater than the application scenarios of the first preset value, in this case, by the introduction of the present embodiment, technician under this area is according to actual conditions, can select the capacitance of charge-discharge modules to be specially is greater than the second preset value or is less than the first preset value, to meet the demand of actual conditions, at this, do not limit.
By above-mentioned part, can find out, due to the end of can discharging in a power cycle of the first operating voltage of the charge-discharge modules in the embodiment of the present invention, so the first operating voltage providing at the first power supply is reduced to first after first threshold constantly, main control module power down, charge-discharge modules is powered in discharge condition and to reseting module, second moment after first moment, charge-discharge modules electric discharge finishes, time period between first moment and second moment is less than a power cycle of the first operating voltage, and be more than or equal to the 3rd moment after second moment after Second Threshold in the first operating voltage, when charge-discharge modules is in charging process, trigger reseting module and provide the first reset signal to main control module, make the main control module can be according to the first reseting signal reset, and then make electronic equipment automatically realize and restarting, therefore solve in prior art the electronic equipments such as televisor and when transient voltage falls, had the technical matters that cannot restart.
Simultaneously, owing to having solved the electronic equipment such as televisor in prior art, when falling, transient voltage there is the technical matters that cannot restart, so do not need power lead that user plugs the electronic equipments such as televisor again manually to restart televisor, the user who has then improved the electronic equipments such as televisor experiences.
Based on same inventive concept, the embodiment of the present invention also provides a kind of electronic equipment, please refer to Fig. 7, and Fig. 7 is the functional block diagram of the electronic equipment that provides of the embodiment of the present invention, and this electronic equipment comprises: casing 701; Electric supply installation 702; Reset circuit 703, is connected with electric supply installation 702.
Electronic equipment in the embodiment of the present invention and the reset circuit in previous embodiment, repositioning method are two aspects based under same inventive concept, above, the implementation process of reset circuit, repositioning method has been done to detailed description, so the technician under this area can be according to aforementioned structure and the implementation process of understanding the electronic equipment in the present embodiment with being described clearly, succinct for instructions, has just repeated no more at this.
Technical scheme in the invention described above embodiment, at least has following technique effect or advantage:
1, due to the end of can discharging in a power cycle of the first operating voltage of the charge-discharge modules in the embodiment of the present invention, so the first operating voltage providing at the first power supply is reduced to first after first threshold constantly, main control module power down, charge-discharge modules is powered in discharge condition and to reseting module, second moment after first moment, charge-discharge modules electric discharge finishes, time period between first moment and second moment is less than a power cycle of the first operating voltage, and be more than or equal to the 3rd moment after second moment after Second Threshold in the first operating voltage, when charge-discharge modules is in charging process, trigger reseting module and provide the first reset signal to main control module, make the main control module can be according to the first reseting signal reset, and then make electronic equipment automatically realize and restarting, therefore solve in prior art the electronic equipments such as televisor and when transient voltage falls, had the technical matters that cannot restart.
2, owing to having solved the electronic equipment such as televisor in prior art, when falling, transient voltage there is the technical matters that cannot restart, so do not need power lead that user plugs the electronic equipments such as televisor again manually to restart televisor, the user who has then improved the electronic equipments such as televisor experiences.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (9)
1. a reset circuit, is applied to, in an electronic equipment, it is characterized in that, described reset circuit comprises:
Main control module, obtains power supply from the first power supply;
Charge-discharge modules, obtains power supply from described the first power supply;
Reseting module, is connected with described main control module and described charge-discharge modules respectively;
Wherein, the first operating voltage providing at described the first power supply is reduced to first after first threshold constantly, described main control module power down, and described charge-discharge modules is in discharge condition and give described reseting module power supply; In second moment after described first moment, described charge-discharge modules electric discharge finishes, and the time period between described first moment and described second moment is less than a power cycle of described the first operating voltage; In described the first operating voltage, be more than or equal to the 3rd moment after described second moment after Second Threshold, when described charge-discharge modules is in charging process, trigger described reseting module and provide the first reset signal to described main control module, make the described main control module can be according to described the first reseting signal reset, wherein, described Second Threshold is greater than described first threshold.
2. reset circuit as claimed in claim 1, is characterized in that, described charge-discharge modules is specially a capacitance module, and the capacitance of described capacitance module is less than the first preset value, makes the end of can discharging in a described power cycle of described capacitance module.
3. reset circuit as claimed in claim 2, is characterized in that, described main control module is specially a main control chip, and described main control chip comprises that a reset signal receives pin, and described reseting module receives pin with described reset signal and is connected.
4. reset circuit as claimed in claim 2, is characterized in that, the capacitance of described capacitance module is greater than the second preset value, makes to be less than a default ripple voltage value by the ripple voltage value of described reseting module.
5. an electronic equipment, is characterized in that, comprising:
Casing;
Electric supply installation, is arranged in described casing;
Reset circuit as described in claim as arbitrary in claim 1-4, is arranged in described casing, is connected with described electric supply installation.
6. a repositioning method, be applied to an electronic equipment, it is characterized in that, described electronic equipment comprises a reset circuit, described reset circuit comprises main control module, charge-discharge modules and reseting module, and described main control module obtains power supply from the first power supply, and described charge-discharge modules obtains power supply from described the first power supply, described reseting module is connected with described main control module and described charge-discharge modules respectively, and described method comprises:
The first operating voltage providing at described the first power supply is reduced to first after first threshold constantly, described main control module power down, and described charge-discharge modules is in discharge condition and give described reseting module electric discharge;
In second moment after described first moment, described charge-discharge modules electric discharge finishes, and the time period between described first moment and described second moment is less than a power cycle of described the first operating voltage;
In described the first operating voltage, be more than or equal to the 3rd moment after described second moment after Second Threshold, when described charge-discharge modules is in charging process, trigger described reseting module and provide the first reset signal to described main control module, make the described main control module can be according to described the first reseting signal reset, wherein, described Second Threshold is greater than described first threshold.
7. method as claimed in claim 6, is characterized in that, described charge-discharge modules is specially a capacitance module, and the capacitance of described capacitance module is less than the first preset value, makes the end of can discharging in a described power cycle of described capacitance module.
8. method as claimed in claim 7, is characterized in that, described main control module is specially a main control chip, and described main control chip comprises that a reset signal receives pin, and described reseting module receives pin with described reset signal and is connected.
9. method as claimed in claim 7, is characterized in that, the capacitance of described capacitance module is greater than the second preset value, makes to be less than a default ripple voltage value by the ripple voltage value of described reseting module.
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| CN201310061842.3A CN104007800B (en) | 2013-02-27 | 2013-02-27 | A kind of reset circuit, electronic equipment and repositioning method |
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| CN201310061842.3A CN104007800B (en) | 2013-02-27 | 2013-02-27 | A kind of reset circuit, electronic equipment and repositioning method |
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| CN104007800A true CN104007800A (en) | 2014-08-27 |
| CN104007800B CN104007800B (en) | 2018-02-27 |
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| CN107197380B (en) * | 2017-01-26 | 2019-12-06 | 青岛海信电器股份有限公司 | Intelligent television and undervoltage protection fault-tolerant method thereof |
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| CN107341075B (en) * | 2017-08-28 | 2023-12-15 | 北京世通凌讯科技有限公司 | Power-down protection device and electronic equipment |
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| CN104007800B (en) | 2018-02-27 |
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