CN103839014B - Self-destruction circuit of tablet personal computer storage device - Google Patents
Self-destruction circuit of tablet personal computer storage device Download PDFInfo
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- CN103839014B CN103839014B CN201410103170.2A CN201410103170A CN103839014B CN 103839014 B CN103839014 B CN 103839014B CN 201410103170 A CN201410103170 A CN 201410103170A CN 103839014 B CN103839014 B CN 103839014B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
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Abstract
The invention discloses a self-destruction circuit of a tablet personal computer storage device. The self-destruction circuit comprises a detecting unit, a switching unit and a destruction unit. The detecting unit is used for detecting whether a tablet personal computer is illegally disassembled or not and generating a corresponding computer disassembling signal; the switching unit is electrically connected to the detecting unit and used for connecting a direct current power source to the destruction unit according to the corresponding computer disassembling signal and providing input voltage to the destruction unit; the destruction unit comprises a voltage boosting circuit which is electrically connected to the switching unit and used for boosting the input voltage provided by the switching unit so that destruction voltage can be generated and outputting the destruction voltage to signal pins of the tablet personal computer storage device. Device cost can be reduced, circuit integration is convenient, and the self-destruction circuit can be widely applied to the tablet personal computer and other precise devices which are small in size and high in requirement.
Description
Technical field
The present invention relates to a kind of self-destruction circuit is and in particular to a kind of panel computer storage device self-destruction circuit.
Background technology
With informationalized development, the range of panel computer has also obtained great popularization, people can by data with
The formation of electronic document is stored in the storage device of panel computer, such as NAND Flash, Tf-Card etc..In order to prevent storing
Data is stolen, and prior art can be protected to data by various software or hardware configuration, such as tears machine self-destruction circuit open, this is torn open
The purpose of machine self-destruction circuit is to prevent from obtaining the data in storage device by way of disassembling storage device.In the market
Tear open machine self-destruction circuit be mainly by programmable device control relay, bulky capacitor is charged and sparks export one big
Transient energy reaches burns function to back-end circuit.However, this kind of self-destruction circuit needs the electric capacity of thousand of microfarads, with
As a example the SIKOREL125 25v3000uf 3300uf of EPCOS (Siemens), the volume of this electric capacity is that (diameter * is high for 21x38mm
Degree), its volume is larger, and price is high, not only increase cost and be not easy to circuit integrated it is clear that being not appropriate for being applied to flat board electricity
The precision equipment that this small size of brain has high demands.
Content of the invention
For the deficiencies in the prior art, the present invention proposes a kind of panel computer storage device self-destruction circuit, it is possible to decrease set
Standby cost and be easy to that circuit is integrated, can be widely applied to the precision equipment that this small size of panel computer has high demands.
In order to achieve the above object, the technical solution adopted in the present invention is as follows：
A kind of panel computer storage device self-destruction circuit, including detector unit, switch unit and damage unit；Described detection
Unit, for detecting whether panel computer is illegally torn open machine, and generates and corresponding tears machine signal open；Described switch unit, it is electrical
Connect to this detector unit, connect a DC source to described damage unit and to described damage for machine signal is torn open according to correspondence
Ruining unit provides an input voltage；Described damage unit, it includes a booster circuit, and this booster circuit is electrically connected to this switching
Unit, the input voltage for providing this switch unit is boosted to generate a damage voltage, and will be defeated for this damage voltage
Go out to the signal pin of panel computer storage device.
Preferably, described booster circuit is the DC boosting modular converter of feedback-less.
Preferably, described DC boosting modular converter includes DC boost converter, the first diode, the 4th to the 9th electricity
Appearance, the first to the second inductance and the 6th to the 9th resistance；Wherein, the voltage input end of this DC boost converter pass through this
Two inductance connections to this switch unit outfan, also by the 4th electric capacity in parallel and the 5th capacity earth, also successively
By the 6th resistance and the 6th capacity earth, defeated to the voltage of this DC boost converter also by this second inductance connection
Go out end；The power control terminal of this DC boost converter is connected between the 6th resistance and the 6th electric capacity；This DC boosting
The voltage output end of transducer connects to the anode of this first diode；The overvoltage protection end of this DC boost converter connect to
The negative electrode of this first diode；The feedback input end of this DC boost converter passes through the 7th capacitance connection to this first diode
Negative electrode, also pass sequentially through the 7th resistance, the 8th in parallel resistance and the 9th resistance eutral grounding；The moon of this first diode
Pole the 8th electric capacity in parallel and the 9th capacity earth.
Preferably, described damage unit also includes a comparison circuit and an electronic switching circuit；Described comparison circuit is electrical
Connect to booster circuit, for being compared the threshold value prestoring in described damage voltage and comparison circuit, and according to comparing knot
Fruit exports corresponding drive signal；Described electronic switching circuit includes an input, an outfan and a described driving of reception
The control end of signal, this electronic switching circuit is used for correspondingly being turned on or off under the control of this drive signal, this electronic cutting
The input closing circuit connects to the outfan of booster circuit, and the outfan of this electronic switching circuit connects to panel computer storage
The signal pin of equipment.
Preferably, described damage unit also includes an anti-back flow circuit, and this anti-back flow circuit is electrically connected at electrical switch
Between circuit and flat board computer storage equipment；The outfan of described switch unit is connected to liter piezoelectricity by one first filter circuit
The input on road；The input of described electronic switching circuit is connected to the outfan of booster circuit by one second filter circuit.
Preferably, described damage unit also includes pwm control circuit and electronic switching circuit；Described pwm control circuit electricity
Property connect to this booster circuit, for exporting periodic drive control signal, described electronic switching circuit be used in this drive
Correspondingly it is turned on or off under the control of dynamic control signal；Described electronic switching circuit include an input, an outfan and
The control end of the one described drive control signal of reception, the input of this electronic switching circuit connects to the outfan of booster circuit,
The outfan of this electronic switching circuit connects to the signal pin of panel computer storage device.
Preferably, described pwm control circuit include the first pwm pulse generator, the second pwm pulse generator, the four or three
Level pipe, the second diode, the tenth electric capacity and the 12nd to the 16th resistance；Wherein, the output of this first pwm pulse generator
End connects the input of this second pwm pulse generator, and the outfan of this first pwm pulse generator passes sequentially through the 16th
Resistance and the 15th resistance connect the input of this first pwm pulse generator；The outfan of this second pwm pulse generator
By the tenth capacitance connection between the 16th resistance and the 15th resistance；The base stage of the 4th triode passes through the tenth
Four resistance connect between this first pwm pulse generator and this second pwm pulse generator, the emitter stage of the 4th triode
Ground connection, the colelctor electrode of the 4th triode connects the negative electrode of this second diode；The anode of this second diode passes sequentially through this
13rd resistance and the 12nd resistance connect to the outfan of booster circuit；Between 13rd resistance and the 12nd resistance
Node connect to the control end of this electronic switching circuit.
Preferably, described detector unit includes the first signals collecting line, the first audion, the first electric capacity and first to
Five resistance；Wherein, the signal output part of this first signals collecting line pass sequentially through this first resistor and this second resistance connect to
Described DC source, also by this first capacitance connection between this first resistor and this second resistance, and this first signal is adopted
The signal output part ground connection of line concentration；The base stage of this first audion by this 3rd resistor connect to this first resistor and this second
Between resistance, the colelctor electrode of this first audion is connected to described DC source by the 5th resistance, also by the 4th electricity
Resistance connects to described switch unit；The grounded emitter of this first audion.
Preferably, described testing circuit also includes secondary signal gathering line, the signal output part of this secondary signal gathering line
Connect to this resistance and this second resistance.
Preferably, the internal battery that described DC source carries for panel computer.
Compared with prior art, the present invention is when panel computer is detected and illegally being torn open machine, can will be straight by switch unit
Stream power supply connects to damage unit and provides an input voltage to damage unit, through damaging the booster circuit of unit by above-mentioned input
The damage voltage of a high-voltage great-current, and the letter by this damage voltage output to panel computer storage device is generated after boost in voltage
Number pin (as the RE pin of NAND Flash, the clock pins of Tf-Card), to puncture storage device, realizes to panel computer
The damage of storage device.The invention has the advantages that：
1st, the present invention, when panel computer is detected and illegally being torn open machine, directly adopts a booster circuit that DC source is provided
Input voltage carry out boosting process, to obtain the damage voltage of a high-voltage great-current, with prior art in pass through programmable device
Control relay is charged to bulky capacitor and sparks comparing to obtain a big transient energy, and it can avoid bulky capacitor
Use, thus reducing equipment cost and being easy to that circuit is integrated, can be widely applied to what this small size of panel computer had high demands
Precision equipment.
2nd, the present invention is just connected DC source to damage by switch unit detecting when panel computer is illegally torn open machine
Ruin unit and provide an input voltage to damage unit, compared with prior art, its stand-by power consumption is very little it is only necessary to 10uA is left
Right.
3rd, the present invention adopt a feedback-less DC boosting modular converter as booster circuit, can rapidly obtain one high
The damage voltage of pressure high current, and fully puncture panel computer storage device.
4th, the present invention realizes to the control damaging voltage value also by comparison circuit and electronic switching circuit, by default
Threshold values can ensure that the damage voltage exporting to panel computer storage device reaches threshold values, to improve the reliability of damage.
5th, the internal battery that the DC source of the present invention carries for panel computer, and the self-destruction circuit on market is required for volume
One battery of outer carry could work.
Brief description
Fig. 1 is the circuit block diagram of the preferred embodiment of panel computer storage device self-destruction circuit of the present invention；
Fig. 2 is the circuit diagram of detector unit in Fig. 1；
Fig. 3 is the circuit diagram of switch unit in Fig. 1；
Fig. 4 is the circuit diagram damaging unit in Fig. 1；
Fig. 5 is second embodiment of panel computer storage device self-destruction circuit of the present invention；
Fig. 6 is the circuit diagram damaging unit in Fig. 5.
Specific embodiment
Below, in conjunction with accompanying drawing and specific embodiment, the present invention is described further, in order to clearer understanding
Present invention technological thought required for protection.
In the specific descriptions of following preferred embodiment, by the accompanying drawing with reference to appended by a composition present invention part.Institute
Attached accompanying drawing has been illustrated by way of example and has been capable of specific embodiment, and the embodiment of example is not intended as
Limit is according to all embodiments of the present invention.It is appreciated that without departing from the scope of the present invention, it is possible to use other
Embodiment is it is also possible to carry out structural or logicality modification.Therefore, specific descriptions below nonrestrictive, and this
The scope of invention is defined by the claims appended hereto.
Refer to Fig. 1, the present invention relates to a kind of panel computer storage device self-destruction circuit, its better embodiment includes examining
Survey unit 100, switch unit 200 and damage unit 300.
Detector unit 100 is used for detecting whether panel computer is illegally torn open machine, and generates and corresponding tear machine signal open.Flat board electricity
The casing of brain includes a face-piece and back cover, when this face-piece is disassembled thus during away from back cover, this detector unit 100 corresponds to generation one
Tear machine signal open, and this is torn open machine signal and send to this switch unit 200.In this regard, detector unit 100 can also select prior art
Present in multiple generating modes tearing machine signal open, such as pass through setting microswitch, photosensitive switch etc. inside face-piece, also can lead to
Excess pressure induction installation.
In the present embodiment, detector unit 100 includes the first signals collecting line (not shown), secondary signal gathering line
(not shown), audion Q1, electric capacity C1 and resistance R1 are to resistance R5.The signal output part of the first signals collecting line
(TEST1PI, TEST1NI) passes sequentially through this resistance R1 and this resistance R2 and connects to a DC source VBAT, also by this electric capacity
C1 connects between this resistance R1 and this resistance R2, and the signal output part (TEST1PI, TEST1NI) of this signals collecting line connects
Ground.The signal output part (TEST1P2, TEST1N2) of this secondary signal gathering line connects between this resistance R1 and this resistance R2.
The base stage of this audion Q1 connects the signal output part (TEST1P2, TEST1N2) of this secondary signal gathering line by resistance R3；
The colelctor electrode of this audion Q1 is connected to this DC source VBAT by this resistance R5, connects to this switching also by this resistance R4
Unit 200, and this tears machine signal EN_KILL open to switch unit 200 output；The grounded emitter of this audion Q1.
This first signals collecting line is arranged in a broken string box, and the two ends soldering of this first signals collecting line is in flat board electricity
On the PCBA of brain, under normal circumstances, this first signals collecting line is in "on" position.This broken string box is positioned on PCBA, and face
Inside shell, a buckle is provided with to the position of the box that should break, when face-piece is disassembled, this buckle closely clasps this broken string box simultaneously
It is driven to move to the direction away from back cover, thus pulling apart the first signals collecting line being arranged in this broken string box.The present embodiment
In, in order to avoid the problem of getting stuck occurring it is ensured that to the accuracy illegally tearing machine testing open and susceptiveness, the present embodiment be configured with this
Binary signal gathering line, it is the same with the first signals collecting line, is also arranged in this broken string box, and the two of this secondary signal gathering line
On the PCBA of panel computer, under normal circumstances, this secondary signal gathering line is in "on" position for end soldering；When face-piece is disassembled
When, this secondary signal gathering line is torn.It is also possible to cancel this secondary signal gathering line in some other embodiment.
Below the present embodiment detector unit 100 operation principle is illustrated：Under normal circumstances, this first signals collecting
Line and secondary signal gathering line are in "on" position, now audion Q1 conducting, and the colelctor electrode of audion Q1 passes through resistance R5
Draw high to high level with DC source VBAT, and generate the high level tearing machine signal EN_KILL open；When face-piece is disassembled, first
It is torn in signals collecting line and/or secondary signal gathering line, now audion Q1 cut-off, the colelctor electrode of audion Q1 is drawn
Low, and start to export the low level tearing machine signal EN_KILL open.Wherein, resistance R1 and electric capacity C1 constitutes and prevents gushing circuit.
Switch unit 200 is electrically connected to this detector unit 100, for tearing machine signal open by above-mentioned DC source according to correspondence
VBAT connects to this damage unit 300 and provides an input voltage KILL_VDD to this damage unit 300.Switch unit 200
To the effect of electrical switch, it can be using as the field effect transistor in this enforcement and/or electronic switch chip A04409.The present invention
Just by this switch unit 200, DC source VBAT is connected to damage unit when panel computer is illegally torn open machine detecting
300 and to damage unit 300 provide this input voltage KILL_VDD, compared with prior art, its stand-by power consumption very little it is only necessary to
Want 10uA.
Damage unit 300 includes the first filter circuit 310, booster circuit 320, the second filter circuit 330, comparison circuit
340th, electronic switching circuit 350 and anti-back flow circuit 360.
Wherein, this first filter circuit 310, booster circuit 320 and the second filter circuit 330 are electrically connected with successively, switching
Unit 200 provide this input voltage KILL_VDD pass sequentially through this first filter circuit 310 filter, 320 liters of this booster circuit
Pressure is filtered by this second filter circuit 330 after generating a damage voltage again.This comparison circuit 340 is electrically connected to boosting
Circuit 320, for being compared the threshold value prestoring in above-mentioned damage voltage and comparison circuit, and exports phase according to comparative result
The drive signal answered.This electronic switching circuit 350 includes the control of an input, an outfan and this drive signal of reception
End, this electronic switching circuit 350 is used for correspondingly being turned on or off under the control of this drive signal, this electronic switching circuit
350 input connects to the outfan of booster circuit 320, and the outfan of this electronic switching circuit 350 passes through this reverse-filling electricity
Road 360 connects to the signal pin of panel computer storage device (such as the RE pin of NAND Flash, the clock pipe of Tf-Card
Foot).The present invention passes through comparison circuit 340 and electronic switching circuit 350 is realized to the control damaging voltage value, by presetting valve
Value can ensure that the damage voltage exporting to panel computer storage device reaches threshold values, to improve the reliability of damage.
In the present embodiment, booster circuit 320 is the DC boosting modular converter of feedback-less, this DC boosting modular converter
Including DC boost converter U1, diode D1, electric capacity C6 to electric capacity C9, inductance L2 and resistance R6 to resistance R9.Wherein, should
The voltage input end VIN of DC boost converter U1 connects to the outfan of this switch unit 200, also passes sequentially through this resistance R6
It is grounded with the 6th electric capacity C6, connect also by this inductance L2 to the voltage output end SW of this DC boost converter.This direct current
The power control terminal SHDN of boost converter U1 is connected between this this resistance R6 and the 6th electric capacity C6.This DC boosting is changed
The voltage output end SW of device U1 connects to the anode of diode D1.The overvoltage protection end OVP of this DC boost converter U1 connects
Negative electrode to this diode D1.The feedback input end FB of this DC boost converter U1 is connected to this two grades by the 7th electric capacity C7
The negative electrode of pipe D1, also passes sequentially through this resistance R7, this resistance R8 in parallel and this resistance R9 ground connection.The negative electrode of this diode D1 leads to
This electric capacity C87 and this electric capacity C9 that cross parallel connection are grounded, and the negative electrode of this diode D1 is the outfan of booster circuit 320.
The chip model that DC boost converter U1 adopts is SY7200, and the DC boosting modular converter of the present invention can directly
The feedback input end FB of stream boost converter U1 directly passes sequentially through this resistance R7, this resistance R8 in parallel and this resistance R9 connects
Ground, forms a voltage increase and current constant circuit of feedback-less, thus the damage voltage of a high-voltage great-current can rapidly be obtained, and fills
Divide and puncture panel computer storage device.
Preferably, this comparison circuit 340 is a comparison circuit being made up of voltage-reference, those skilled in the art's root
A circuit with comparing function of the present invention can be built according to prior art by chip TL431.This electronic switching circuit 350
For a field effect transistor, the control end of this electronic switching circuit 350, input and outfan correspond to this field effect transistor grid,
Source electrode and drain electrode.Preferably, this anti-back flow circuit 360 is diode.
In the present embodiment, the internal battery that DC source VBAT carries for panel computer, and the self-destruction circuit on market
It is required for one battery of extra carry could work.
In other embodiments, damage unit may also be employed other implementations, as shown in figure 5, electric for flat board of the present invention
Second embodiment of brain storage device self-destruction circuit, its difference from above-mentioned embodiment essentially consists in, by pre-stored threshold values
Comparison circuit replace with a pwm control circuit, specifically, in second embodiment, damage unit include the first filtering
Circuit 310 ', booster circuit 320 ', pwm control circuit 330 ' and electronic switching circuit 340 '.
This first filter circuit 310 ' outfan connects the input of this booster circuit 320 ', and switch unit 200 provides
This input voltage KILL_VDD is delivered to booster circuit 320 ' after passing sequentially through the filtering of this first filter circuit 310 ' and is boosted,
And correspond to generation one damage voltage on the storage capacitor C11 in this booster circuit 320 '.
This pwm control circuit 330 ' is electrically connected to booster circuit 320, for exporting periodic drive control signal.
This electronic switching circuit 340 ' is used for correspondingly being turned on or off under the control of this drive control signal；This electronic switching circuit
340 ' the control ends including an input, an outfan and an above-mentioned drive control signal of reception, this electronic switching circuit
Input connects to the outfan of booster circuit, and the outfan of this electronic switching circuit connects to the letter of panel computer storage device
Number pin (as the RE pin of NAND Flash, the clock pins of Tf-Card).In the present embodiment, electronic switching circuit 340 '
Periodically turn in the drive control signal of pwm control circuit 330 ' and disconnect, when electronic switching circuit 340 ' turns on,
Booster circuit 320 ' is delivered to damaging voltage to the signal pin of panel computer storage device (the RE pipe as NAND Flash
Foot, the clock pins of Tf-Card), when electronic switching circuit 340 ' disconnects, booster circuit 320 ' stops the defeated of damage voltage
Send, now storage capacitor C11 in booster circuit continue to charge (for example pass through booster circuit can on this storage capacitor C11 shape
Become the damage voltage of 29V), therefore, can be for constantly storing to panel computer in the continuous charge and discharge process of storage capacitor C11
Equipment carries out damage provides power.
More specifically, this pwm control circuit 330 ' includes pwm pulse generator U2, pwm pulse generator U3, triode
Q4, diode D2, electric capacity C10 and resistance R12 are to resistance R16.Wherein, the outfan of this pwm pulse generator U2 connects and is somebody's turn to do
The input of pwm pulse generator U3, the outfan of this pwm pulse generator U2 passes sequentially through this resistance R16 and this resistance R15
Connect the input of this pwm pulse generator U2；The outfan of this pwm pulse generator U3 is connected to this by this electric capacity C10
Between resistance R16 and this resistance R15；The base stage of this triode Q4 connected to this pwm pulse generator U2 by this resistance R14 and
Between this pwm pulse generator U3, the grounded emitter of this triode Q4, the colelctor electrode of this triode Q4 connects this diode D2
Negative electrode；The anode of this diode D2 passes sequentially through this resistance R13 and this resistance R12 and connects to the output of booster circuit 320 '
End；Node between this resistance R13 and this resistance R12 connects to the control end of this electronic switching circuit 340 ', drives for output
Dynamic control signal.
Above-mentioned pwm pulse generator U2, pwm pulse generator U3, resistance R16, resistance R15 and the common structure of electric capacity C10
Become a square-wave generator with some cycles (if the cycle is 480ms), periodically to export low and high level signal, when it is defeated
When going out the high level for square wave, triode Q4 turns on, and then promotes electronic switching circuit 340 ' to turn on, when it is output as square wave
During low level, triode Q4 ends, and promotes electronic switching circuit 340 ' to disconnect.
This electronic switching circuit 340 ' is a field effect transistor, the control end of this electronic switching circuit 350, input and output
End corresponds to grid, source electrode and the drain electrode of this field effect transistor.Preferably, this anti-back flow circuit 360 is diode.Pwm pulse
The chip model of generator U2 and pwm pulse generator U3 is U307.
For a person skilled in the art, can technical scheme as described above and design, make other each
Plant corresponding change and deform, and all these changes and deforms the protection model that all should belong to the claims in the present invention
Within enclosing.
Claims (10)
1. a kind of panel computer storage device self-destruction circuit is it is characterised in that include detector unit, switch unit and damage list
Unit, wherein：
Described detector unit, for detecting whether panel computer is illegally torn open machine, and generates and corresponding tears machine signal open；
Described switch unit, it is electrically connected to this detector unit, connects a DC source for tearing machine signal open according to correspondence
There is provided an input voltage to described damage unit and to described damage unit；
Described damage unit, it includes a booster circuit, and this booster circuit is electrically connected to this switch unit, for switching this
The input voltage that unit provides is boosted to generate a damage voltage, and this damage voltage output is set to panel computer storage
Standby signal pin.
2. panel computer storage device self-destruction circuit as claimed in claim 1 is it is characterised in that described booster circuit is no anti-
The DC boosting modular converter of feedback.
3. panel computer storage device self-destruction circuit as claimed in claim 2 is it is characterised in that described DC boosting modulus of conversion
Block includes DC boost converter, the first diode, the 6th to the 9th electric capacity, the second inductance and the 6th to the 9th resistance；Its
In, the voltage input end of this DC boost converter connects to the outfan of this switch unit, also passes sequentially through the 6th resistance
With the 6th capacity earth, also by the voltage output end of this second inductance connection to this DC boost converter；This direct current liter
The power control terminal of pressure converter is connected between the 6th resistance and the 6th electric capacity；The voltage of this DC boost converter is defeated
Go out end to connect to the anode of this first diode；The overvoltage protection end of this DC boost converter connects to this first diode
Negative electrode；The feedback input end of this DC boost converter pass through the 7th capacitance connection to this first diode negative electrode, also successively
By the 7th resistance, the 8th resistance in parallel and the 9th resistance eutral grounding；The negative electrode of this first diode is in parallel
8th electric capacity and the 9th capacity earth.
4. panel computer storage device self-destruction circuit as claimed in claim 1 is it is characterised in that described damage unit also includes
One comparison circuit and an electronic switching circuit；Described comparison circuit is electrically connected to booster circuit, for by described damage voltage
It is compared with the threshold value prestoring in comparison circuit, and corresponding drive signal is exported according to comparative result；Described electrical switch
Circuit includes the control end of an input, an outfan and a described drive signal of reception, and this electronic switching circuit is used for
Correspondingly it is turned on or off under the control of this drive signal, the input of this electronic switching circuit connects to the output of booster circuit
End, the outfan of this electronic switching circuit connects to the signal pin of panel computer storage device.
5. panel computer storage device self-destruction circuit as claimed in claim 4 is it is characterised in that described damage unit also includes
One anti-back flow circuit, this anti-back flow circuit is electrically connected between electronic switching circuit and flat board computer storage equipment；Described cut
The outfan changing unit is connected to the input of booster circuit by one first filter circuit；The input of described electronic switching circuit
End is connected to the outfan of booster circuit by one second filter circuit.
6. panel computer storage device self-destruction circuit as claimed in claim 1 is it is characterised in that described damage unit also includes
Pwm control circuit and electronic switching circuit；Described pwm control circuit is electrically connected to this booster circuit, for output periodically
Drive control signal, described electronic switching circuit be used for correspondingly be turned on or off under the control of this drive control signal；
Described electronic switching circuit includes the control end of an input, an outfan and a described drive control signal of reception, this electricity
The input of sub- on-off circuit connects to the outfan of booster circuit, and the outfan of this electronic switching circuit connects to panel computer
The signal pin of storage device.
7. panel computer storage device self-destruction circuit as claimed in claim 6 is it is characterised in that described pwm control circuit bag
Include the first pwm pulse generator, the second pwm pulse generator, the 4th triode, the second diode, the tenth electric capacity and the tenth
Two to the 16th resistance；Wherein, the outfan of this first pwm pulse generator connects the input of this second pwm pulse generator
End, the outfan of this first pwm pulse generator passes sequentially through the 16th resistance and the 15th resistance connects a PWM
The input of pulse generator；The outfan of this second pwm pulse generator passes through the tenth capacitance connection to the 16th electricity
Between resistance and the 15th resistance；The base stage of the 4th triode is connected to the generation of this first pwm pulse by the 14th resistance
Between device and this second pwm pulse generator, the grounded emitter of the 4th triode, the colelctor electrode of the 4th triode connects
The negative electrode of this second diode；The anode of this second diode passes sequentially through the 13rd resistance and the 12nd resistance connect to
The outfan of booster circuit；Node between 13rd resistance and the 12nd resistance connects to the control of this electronic switching circuit
End processed.
8. panel computer storage device self-destruction circuit as claimed in claim 1 is it is characterised in that described detector unit includes
One signals collecting line, the first audion, the first electric capacity and the first to the 5th resistance；Wherein, the letter of this first signals collecting line
Number outfan passes sequentially through this first resistor and this second resistance connects to described DC source, also by this first capacitance connection
To between this first resistor and this second resistance, and the signal output part ground connection of this first signals collecting line；This first audion
Base stage connected between this first resistor and this second resistance by this 3rd resistor, the colelctor electrode of this first audion passes through
5th resistance connects to described DC source, connects to described switch unit also by the 4th resistance；This first audion
Grounded emitter.
9. panel computer storage device self-destruction circuit as claimed in claim 8 is it is characterised in that described testing circuit also includes
Secondary signal gathering line, the signal output part of this secondary signal gathering line connects to this resistance and this second resistance.
10. panel computer storage device self-destruction circuit as claimed in claim 1 is it is characterised in that described DC source is flat
The internal battery that plate computer carries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410103170.2A CN103839014B (en) | 2014-03-19 | 2014-03-19 | Self-destruction circuit of tablet personal computer storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410103170.2A CN103839014B (en) | 2014-03-19 | 2014-03-19 | Self-destruction circuit of tablet personal computer storage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103839014A CN103839014A (en) | 2014-06-04 |
| CN103839014B true CN103839014B (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410103170.2A Active CN103839014B (en) | 2014-03-19 | 2014-03-19 | Self-destruction circuit of tablet personal computer storage device |
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| CN111046442B (en) * | 2019-12-11 | 2020-09-11 | 上海载德信息科技股份有限公司 | Self-destruction circuit of storage component of equipment and equipment with storage function |
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