CN203299809U - Data protection circuit - Google Patents
Data protection circuit Download PDFInfo
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- CN203299809U CN203299809U CN2013203562266U CN201320356226U CN203299809U CN 203299809 U CN203299809 U CN 203299809U CN 2013203562266 U CN2013203562266 U CN 2013203562266U CN 201320356226 U CN201320356226 U CN 201320356226U CN 203299809 U CN203299809 U CN 203299809U
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Abstract
The utility model discloses a data protection circuit which comprises a voltage monitoring signal and a control chip. The voltage monitoring circuit is connected with a power supply end and analyzes circuit abnormality, the control chip receives signals of the voltage monitoring circuit and is connected with a backup circuit, the backup circuit performs backup copy on data of a control system, and an output end of the backup circuit is connected with a backup line which is used for transmitting data backup signals of the system. The data protection circuit has the advantages that whether internal voltage of the system is normal nor not is monitored by the voltage monitoring circuit, the control chip can drive the backup circuit to transmit a temporary transferring signal when the voltage is abnormal, a backup system of the computer system can perform temporary storage backup copy on the current data after receiving the signal, accordingly, the data can be stored during sudden failure by means of predictive temporary storage, and loss of the data is prevented from being expanded; corresponding electric power can be provided by a storage battery during the failure, so that backup copy can be assuredly performed on the data.
Description
Technical field
The utility model relates to the data security field, is specifically related to a kind of safety circuit that can carry out system data back-up for mutation voltage.
Background technology
In prior art, general computer system has the fixing data backup time, namely according to the backup of carrying out a current data interval time of default, this backup mode can carry out data and recover when system breaks down, so that system input normal operation as early as possible, but this data recover to return to the data mode of the last backup, if the time interval of backup is longer, and before being in backup next time during fault, the data between this can't be recovered.For now, the faults such as normal voltage fluctuation, power failure, all had very perfect coping style, as equipment such as voltage stabilizer, uninterrupted power sources.But the fault for internal system can't be processed, and as the chip of system board self, damages or certain aging circuit etc., and this phenomenon in case occur, can cause intrasystem data can't in time preserve and lose.
The utility model content
The problem that causes data in time to back up due to faults itself for solving prior art Computer system, the utility model provides a kind of data protection circuit.A kind of data protection circuit; it is characterized in that; comprise and being connected with power source supply end and the voltage monitoring circuit that analysis circuit is abnormal, the control chip of receiver voltage monitoring circuit signal; described control chip is connected with the fallback circuit that the control system data back up, and the output terminal of described fallback circuit is connected with the spare line that system sends the data backup signal.
For exporting fast control signal: described fallback circuit is analog switching circuit IC2, and the output terminal of described analog switching circuit IC2 is in parallel with spare line.
For improving measuring accuracy: described voltage monitoring circuit comprises the bridge circuit IC3 that input current is carried out rectification, and whether contrast potential abnormal comparer IC1 and resistance in series R1, the R2 that regulates input comparator IC1 voltage.
For guaranteeing completing of data backup process, described control chip connects promising data backup provides the accumulator of electric power, and the input end of described accumulator is in parallel with control chip and power source supply end, and output terminal is in parallel with fallback circuit.
Whether the utility model is normal by the voltage of voltage monitoring circuit detection system inside, when electric voltage exception occurring, control chip can drive fallback circuit work and send an interim unloading signal, the standby system of computer system can be kept in backup to current data after receiving this signal, by keeping in of this anticipation, realization is preserved the data of catastrophic discontinuityfailure, has avoided data degradation expansion.Can provide corresponding electric power when the fault by accumulator, to guarantee the carrying out of data backup.
The utility model has reduced data degradation by preventative data backup, has reduced the data release time of whole system.
Description of drawings
Fig. 1 illustrative view of functional configuration of the present utility model;
Fig. 2 circuit diagram of the present utility model;
Attached number in the figure explanation: 1-control chip, 2-voltage monitoring circuit, 3-fallback circuit, 4-accumulator, 5-power source supply end, 6-spare line.
Embodiment
As shown in Figure 1; data protection circuit of the present utility model; comprise and the voltage monitoring circuit 2 that power source supply end 5 is connected and analysis circuit is abnormal, the control chip 1 of receiver voltage monitoring circuit signal; the fallback circuit 3 that the control system data that are connected with described control chip 1 back up, the output terminal of described fallback circuit 3 is connected with the spare line 6 that system sends the data backup signal.
the utility model is by the voltage status of voltage monitoring circuit 2 detection system inside, during voltage when occurring higher than setting value in circuit, send an overvoltage signal to control chip 1, control chip 1 transmits control signal to fallback circuit 3 after receiving the overvoltage signal, because fallback circuit 3 is connected with the spare line of system executing data backup, this spare line only just has backup signal at the appointed time to be passed through, after receiving control signal, fallback circuit 3 can send a signal by this spare line 6, the standby system of system is when receiving this improper backup signal, can start corresponding interim stand-by program, to last time backup and the data this moment back up, standby system adopts independently backup mode to the backup of improper backup signal, with present data backup to a scratchpad area (SPA).Adopt be in such a way because: if consequent malfunction continues to cause system crash, carry out the system recovery with the data of this temporary backup after solving fault, do not cause system to be stopped transport if consequent malfunction is removed, by the Normal Backups program, undertaken, automatically abandon this time temporary backup.Described control chip 1 adopts the integrated circuit of TPS23752, and it adopts 20 pin TSSOP sealings, can be the power of POE load generation up to 25.5W, under underloaded condition, can close synchronous rectifier, enters the variable frequency work pattern.
For realizing easily and fast the signal transmission, described fallback circuit 3 of the present utility model is analog switching circuit IC2, and the output terminal of described analog switching circuit IC2 is in parallel with spare line 6.Under normal condition, analog switching circuit IC2 is not communicated with spare line 6, only when fault, analog switching circuit IC2 just can be under the signal controlling of control chip 1 Closing Switch, realization is communicated with spare line 6, and this conducting specifically can be sent by control chip 1 identification signal with regard to a kind of signal of meaning person after conducting, automatically starts interim backup scenario after also can recognizing line conduction by standby system.
For improving accuracy of identification, described voltage monitoring circuit 2 of the present utility model comprises the bridge circuit IC3 that input current is carried out rectification, and whether contrast potential abnormal comparer IC1 and resistance in series R1, the R2 that regulates input comparator IC1 voltage.As shown in Figure 2, bridge circuit in power supply monitoring circuit 2 comprises that four diodes adopt schottky diode or the silicon diode of anti-40V voltage breakdown, comparer IC1 adopts the operational amplifier of Vcc=35V supply voltage, is arranged in to be arranged in by resistance R 2 and two series circuit that the diode D1 that permits on logical direction and D2 form between the high potential of comparer IC1; Be arranged on comparer IC1 low for the series circuit that is formed by two resistance R 1 and R3 between electromotive force; And the pull-up resistor R4 that is arranged on comparer IC1 output terminal, be arranged on the reference potential V1 that permits on logical direction, when the output terminal of comparer IC1 drops to positive terminal position.Utilization is applied to the output voltage of the output of comparer IC1, and analog switching circuit IC2 is closed the connection spare line.Except pull-up resistor R4, can also between the output terminal of the positive input terminal of comparer IC1 and comparer IC1, positive feedback resistor be set, can regulate threshold value by positive feedback resistor, reverse respectively at the output voltage of the comparer IC1 of described threshold value place.Therefore, connect and close threshold value and do not overlap, but by the formation switching hysteresis that staggers each other.The positive input terminal of voltage V1 by comparer IC1 intercepted and is therefore the input voltage that is applied to the positive input terminal place of comparer IC1., by improving the power supply electromotive force of comparer IC1, at the voltage divider place with resistance R 1 and R3, apply larger voltage.Therefore, the voltage that descends at resistance R 3 places is also larger.The voltage of the negative input end intercepting by comparer IC1 is the input voltage that is applied to the negative input end place of comparer IC1.Therefore, be applied to the input voltage at negative input end place of comparer IC1 greater than the input voltage at the positive input terminal place that is applied to comparer IC1.Cause thus the output terminal of comparer IC1 to be turned to negative terminal position, that is to say, the magnitude of voltage of output voltage that is applied to the output of comparer IC1 becomes 0V.Utilize this output voltage, analog switching circuit IC2 is disconnected.
For avoiding the system board electricity shortage to cause carrying out interim backup, control chip 1 of the present utility model is connected with the accumulator 4 of supported data backup, the input end of described accumulator 4 is in parallel with control chip 1 and power source supply end 5, and output terminal is in parallel with fallback circuit 3.Provide electric power by power source supply end under normal circumstances, when voltage rising phenomenon occurring, control chip 1 is after analog switching circuit IC2 transmitted signal, along with being communicated with of analog switching circuit IC2 and spare line, the electric power of accumulator 4 is also along with spare line, being communicated with, if this moment, power source supply end 5 still can provide corresponding electric power, do not affect former power supply, if the electric power of power source supply end 5 self cuts off the power supply or by voltage monitoring circuit 2, cut off, the electric power on accumulator 4 can provide corresponding backup electric power for standby system.Accumulator 4 can independently be arranged on system board, and by power source supply end 5 chargings, it is worked simultaneously with analog switching circuit IC2 at ordinary times, for system backup provides electric power, guarantees.Concrete accumulator capacity size can be selected according to the system of use and the time length of backup.
the above is only preferred embodiment of the present utility model, not the utility model is done any pro forma restriction, although the utility model with preferred embodiment openly as above, yet not in order to limit the utility model, anyly be familiar with the technician of this patent within not breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned prompting is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, any simple modification that foundation technical spirit of the present utility model is done above embodiment, equivalent variations and modification, all still belong in the scope of the utility model scheme.
Claims (4)
1. data protection circuit; it is characterized in that; comprise and the voltage monitoring circuit (2) that power source supply end (5) is connected and analysis circuit is abnormal, the control chip (1) of receiver voltage monitoring circuit signal; the fallback circuit (3) that the control system data that are connected with described control chip (1) back up, the output terminal of described fallback circuit (3) is connected with the spare line (6) that system sends the data backup signal.
2. a kind of data protection circuit as claimed in claim 1, is characterized in that, described fallback circuit (3) is analog switching circuit IC2, and the output terminal of described analog switching circuit IC2 is in parallel with spare line (6).
3. a kind of data protection circuit as claimed in claim 2; it is characterized in that; described voltage monitoring circuit (2) comprises the bridge circuit IC3 that input current is carried out rectification, and whether contrast potential abnormal comparer IC1 and resistance in series R1, the R2 that regulates input comparator IC1 voltage.
4. a kind of data protection circuit as claimed in claim 3; it is characterized in that; described control chip (1) connects promising data backup provides the accumulator (4) of electric power; the input end of described accumulator (4) is in parallel with control chip (1) and power source supply end (5), and output terminal is in parallel with fallback circuit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203562266U CN203299809U (en) | 2013-06-20 | 2013-06-20 | Data protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203562266U CN203299809U (en) | 2013-06-20 | 2013-06-20 | Data protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203299809U true CN203299809U (en) | 2013-11-20 |
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ID=49575807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203562266U Expired - Lifetime CN203299809U (en) | 2013-06-20 | 2013-06-20 | Data protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203299809U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104731723A (en) * | 2015-03-19 | 2015-06-24 | 青岛海信电器股份有限公司 | Power-off protection method and device for storage device |
| CN112531835A (en) * | 2020-11-30 | 2021-03-19 | 惠州Tcl移动通信有限公司 | Charging method and device of mobile terminal, storage medium and mobile terminal |
-
2013
- 2013-06-20 CN CN2013203562266U patent/CN203299809U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104731723A (en) * | 2015-03-19 | 2015-06-24 | 青岛海信电器股份有限公司 | Power-off protection method and device for storage device |
| CN112531835A (en) * | 2020-11-30 | 2021-03-19 | 惠州Tcl移动通信有限公司 | Charging method and device of mobile terminal, storage medium and mobile terminal |
| CN112531835B (en) * | 2020-11-30 | 2024-06-21 | 东莞市熠源电子科技有限公司 | Mobile terminal charging method and device, storage medium and mobile terminal |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131120 |
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| CX01 | Expiry of patent term |