RU2346345C1 - Recorded information erasure device - Google Patents

Abstract

FIELD: physics, computer technology.

SUBSTANCE: referring to the sphere of instrument engineering, the invention enables erasure of information recorded on heterogeneous semiconductor media (such as flash-memory). Recorded information erasure device consists of direct current source, power actuator, current divider, damper unit, capacitor-based energy storage unit, switching unit, solenoid-based field-formation system, controller, four-wire cable and four-contact connector. The field-formation system is composed of frame with four solenoids mounted on it, installed one inside another. The first solenoid pair has oblique coil winding with the winding wire coils skewed at an acute angle relative to the solenoid longitudinal edges within the frame narrow side planes. The second solenoid pair has zig-zag winding with the coils skewed at an acute angle within the frame wide and narrow side planes Under the effect of the rapidly changing electromagnetic field generated by the device the charge arrangement structure of the semiconductor recording media undergoes modifications.

EFFECT: qualitative improvement and acceleration of irretrievable information erasure.

2 cl, 10 dwg

Description

The invention relates to instrumentation technology and can be used to erase records from heterogeneous semiconductor storage media, in particular non-volatile memory devices, flash memory, etc.

The basic principle of operation of non-volatile memory semiconductor devices is to store the charge in an insulated gate. If a charge is stored in an insulated gate, then the threshold voltage U _{TP of the} transistor can vary between two different values, usually defined as “0” and “1”. The threshold voltage varies depending on the amount of charge stored in an insulated gate at a certain distance from it [1]. To erase the recorded information in the form of residual conductivity, it is necessary to restore the initial value of the voltage of the potential barrier for charge carriers, the threshold voltage of which U _TP is equal to the value of the erased state, i.e. the value preceding the entry. This means that a process must occur in which the charge Q _t stored in discrete centers or in an isolated (floating) shutter at a distance of, for example, 1 from the shutter, must at least take a value equal to “0”, and fixed values charge at the interface, for example, silicon - insulator and charge in the depleted silicon layer to take the original value, the previous record.

A device for erasing recorded information on heterogeneous semiconductor media [2], containing a darkened vacuum chamber, a device for creating steam, a compressor for changing vapor pressure, a 30 W incandescent lamp, an electromagnetic valve, a pump to ensure quick adsorbate inlet, a device for changing the distance incandescent lamps, a device for measuring the conductivity of a film, a device for measuring the pressure of water vapor in the chamber, a device for measuring time and a power source, in Hur at an initial pressure of the residual atmosphere of 10 ^-3 ÷ 1 mm Hg. Art. the residual conductivity is excited by the light of a 30 W incandescent lamp located at a distance of 10 cm from the surface of the film — a semiconductor information carrier. During 20 ÷ 60 s measure the conductivity of the film. During the excitation time, the film conductivity reaches a stationary value of δ _sv ~ 10 ^-1 Ohm ^-1 · cm ^-1 .

Adsorption is carried out by increasing the pressure using a compressor of water vapor coming from the device for creating steam into a vacuum chamber with a vapor pressure of up to 10 ÷ 1000 mm RT. Art. for ~ 1 s, controlled by a special time measuring device. With an increase in the conductivity of the film, desorption is carried out by lowering the pressure to an initial level.

Quick inlet and outlet of the adsorbate is carried out using a pump and an electromagnetic valve. Erasing is carried out by an adsorbate pressure pulse, which is constantly monitored by a device for measuring the pulse pressure generated in a darkened vacuum chamber.

The disadvantage of this device is the complexity of the design, the use of expensive equipment, high energy consumption, it takes a lot of time to prepare the erasure process, special monitoring equipment is needed to control the parameters of the components of the device, limited application.

Closest to the invention is a USB 2.0 device as part of a computer, which is described in technology [3], a device for erasing records from heterogeneous semiconductor data carriers with non-volatile memory, flash memory (devices having a special USB connector for connecting to a computer), comprising: a monitor, a keyboard, a mouse, a system unit incorporating a host (Hub), hubs (Hub) and four-pin connectors (connectors) for connecting flash memory to a computer, two for transmitting a signal and two for supply voltage, a cable and a power source. Data erasure transmission is initiated by the host. Transactions on the USB bus consist of two or three acts: sending a marker packet, a data packet, a transaction status packet.

The disadvantage of this device is that the information that needs to be erased may remain in the computer’s RAM, functional devices themselves cannot directly transmit information about erasing, since USB is an output bus from the computer’s system unit, for which it is necessary to have an operating system, which would support USB (Windows 98 Second Edition) and perform software functions. In addition, the high energy costs associated with the need to provide power to a number of PC components, a relatively long erasure time, which is determined by the time the computer takes to work and the transfer of the necessary commands to erase information, the possibility of restoring information, since there is always the possibility that the recorded information will remain in the computer's RAM.

The claimed invention solves the problem of improving the quality of erasing information without the possibility of its recovery, reducing the time of erasing, reducing energy consumption and its simplification by eliminating the complex and expensive hardware-software complex.

The technical result of the invention is to increase the reliability of erasing information while reducing erasing time and energy costs.

Description of figures and symbols

Figure 1 presents a block diagram of a device for erasing recorded information.

Figure 2 presents the electrical circuit of the prototype device for erasing recorded information.

Figure 3 shows graphs of pulsed signals controlling the operation of the device, charge and discharge of the energy storage device (NE5) and the total magnetic fields H _{Σ of} solenoids 29, 30 and 31, 32.

Figure 3 introduced the notation:

T is the maximum value of the irradiation time by the total pulsed magnetic field of the flash memory;

T1 - the period of the signals of the electric pulse generator (GI11);

- t _o - time of the closure of contacts (1) and (3) of the switching device (HC2) and the beginning of the charge of NE5;

- t ₁ - the time of opening of the contacts (1) and (3) UV2, the end of the charge NE5 and the moment of occurrence of the control signals on the contacts (2) GI11 and (2) of the launcher (UZ12) (figure 2);

-t ₂ , t ₃ , t ₄ and t ₅ - times of occurrence of delayed control signals at the outputs (3), (4), (5) and (6) of the programmed delay line (PLZ15);

- t _o 'and t ₁ ' - time moments of the next cycle of the device.

Figure 4 - sketch field-forming system with a breakout.

On figa and 5b two versions of the winding wires of the windings of the solenoids 29, 30 and 31, 32 NE5.

On figa shows the intensity distribution of the component of the magnetic field Hz in the cavity of the field-forming system along the axis minus X - plus X of the Cartesian coordinate system (X, Y, Z), the Z axis of which coincides with the longitudinal axis of the cavity of the field-forming system, and the X axis is coplanar to its wide the wall.

On figb shows the intensity distribution of the component of the magnetic field Well in the cavity of the field-forming system along the axis minus X - plus X of the same coordinate system.

On figv shows the distribution of the intensity of the component of the magnetic field Hz in the cavity of the field-forming system along the axis minus Y - plus Y of the same coordinate system.

On fig.6g shows the intensity distribution of the component of the magnetic field Hx in the cavity of the field-forming system along the axis minus Y - plus Y of the same coordinate system.

The following notation is introduced in the figures:

1 - direct current source (IPT1); 2 - switching device (HC2); 3 - current divider (DT3); 4 - damping device (UD4); 5 - energy storage (NE5); 6 - switching device (UK6); 7 - field-forming system (POS7); 8 - control device (UU8); 9 - four-wire cable; 10 - four-pin connector (connector); 11 - electric pulse generator; 12 - launcher; 13 - voltage divider; 14 - microprocessor; 15 - programmable delay line; 16 - USB bus controller; 17, 18, 19, 20 - damping diodes; 21, 22, 23, 24 - capacitors; 25, 26, 27, 28 - thyristors; 29, 30, 31, 32 - solenoids; 33 - flash memory; 34 - frame of solenoids; 35 - tire with a tip.

The numbers in the figures, written in small print, indicate the numbers of inputs and outputs of the blocks. In the text of the description of the invention, these numbers are enclosed in parentheses.

Description of the claimed device

The technical result of the invention is achieved due to the fact that the device for erasing recorded information contains (Fig. 1): a direct current source IPT1, a power supply device UV2, a current divider DTZ, a damping device UD4, an energy storage device NE5, a switching device UK6, a field-forming POS7 system, a device UU8 control, four-wire cable 9 and four-pin connector (connector) 10.

The direct current source IPT1 has an output (1) (positive terminal) of direct current and a common input (2) (negative terminal).

The UV2 switch-on device has inputs: the first one is for power supply (1), the second one is for control signal (2) and power supply output (3). The second input (2) of HC2 receives control signals from the output (7) of the control device of CC8.

The current divider DT3 has an input voltage (1) and outputs: the first - strong (3) and the second - weak (2) currents, the values of which are multiple.

The UD4 damping device has outputs in terms of the number of solenoids of the NE5 energy storage device, which must be at least four, the same number of damping diodes 17, 18, 19, 20, the same number of unipolar power supply outputs (2), (3), (4), ( 5) and the input voltage (1) (figure 2). The input of the supply voltage UD4 is designed to power the diodes 17, 18, 19,20 with the voltage supplied through the common bus to the anodes of all diodes.

The NE5 energy storage device contains capacitors 21, 22, 23, 44 by the number of NE5 solenoids, the same number of supply voltage inputs (1), (2), (3), (4) and a common supply voltage output (5), which is connected by a common bus to the negative terminal IPT1 (figure 2).

The UK6 switching device contains thyristors 25, 26, 27, 28 according to the number of NE5 solenoids, the same number of supply voltage inputs (1), (2), (3), (4), the same number of control signal inputs (9), (10) , (11), (12) and the same number of outputs of the supply voltage (5), (6), (7), (8) (Fig. 2).

The POS7 field-forming system has a non-magnetic frame on which at least four solenoids are installed coaxially to it one inside the other according to the principle of “nesting dolls” (Fig. 4), first 29, second 30, third 31 and fourth 32, which have corresponding power supply inputs (1) , (2), (3), (4) and the common output of the supply voltage (5), which is connected by a common bus to the negative terminal IPT1 via bus 35 (Figs. 2, 4). The ends of all the solenoid windings are connected to the bus 35. The overall dimensions of the cavity of the frame of the smallest solenoid 29: the width, height and length are larger than the same dimensions of the flash memory 33.

The windings of the coils of a pair of solenoids 29, 32 are oblique, with the slopes of the turns of the wires of the windings in the planes of the narrow walls of the frame 34 to its longitudinal ribs of the solenoids at an angle (90 ° - α) (Fig. 5a). In other words, the parallel planes in which the turns of the wires of the windings lie are at an angle (90 ° - α) to the longitudinal axis of the solenoids.

The inclination angle (90 ° - α) of the oblique winding relative to the longitudinal edges of the frame of the solenoids can be in the range greater than zero, but less than 90 ° (0 ° <α <90 °). In this case, the total magnetic field vector is coplanar to the surfaces of the narrow walls of the solenoid frame and is at an angle α to the Z axis of the Cartesian coordinate system (X, Y, Z) associated with the cross section of the frame 34 (Fig. 5a). One projection Hz of the total magnetic field H _Σ lies on the Z axis and the axis of the frame coinciding with it, and the other Well is orthogonal to it and lies on the Y axis. The projections of the total magnetic field vector are equal to each other at α = 45 °.

The winding of the wires of the coils of a pair of solenoids 30, 31 is made zigzag, i.e. inclined in the planes of the wide and narrow walls of the frame 34 (Fig.5B). The inclination angles φ ₁ , φ ₂ and φ ₃ of the winding wires to the Z axis lie in the range greater than zero, but less than 90 ° (0 ° <φ ₁ , φ ₂ , φ ₃ <90 °). In other words, the parallel planes in which the turns of the windings lie are at sharp angles to the planes XY, YZ and ZX of the Cartesian coordinate system associated with the cross section of the cavity of the field-forming system. In this case, the total magnetic field vector H _Σ is at acute angles φ ₁ , φ ₂ and φ ₃ to different axes of the Cartesian coordinate system (Fig.5b), therefore, it has three components of the total magnetic field Hx, Well and Hz along the corresponding coordinates X, Y and Z (Fig.5b). The optimal value of the angles φ ₁ = 30 °, φ ₂ = 60 ° and φ ₃ = 30 °.

Option control device

The control device UU8 can be performed according to the scheme of figure 2, which contains the following devices:

- a generator of electric pulses GI11 with an input of the supply voltage (1) and the first and second outputs of the start pulses (2) and (3). Input (1) is the input of the supply voltage UU8;

- trigger device UZ12 with input (1) and output (2) of the supply voltage;

- voltage divider D13 with a power input (1) and outputs: the first - power supply of the microcontroller (2) and the second - flash memory (3). The output (3) D13 is the corresponding output of the UV8 (figure 2).

- MP14 microprocessor with inputs: the first is the supply voltage (1), the second is the synchronization (2) and the third is the standby supply voltage (6), constantly on (Figs. 1 and 2), which is the corresponding input of the UU8, and outputs: the first control signals (3) PL315, the second - pulses of a random sequence (4) and the third (5) - control signal of operation of HC2, which is the corresponding output of CC8;

- programmable delay line PL315 with inputs: the first (1) trigger pulses and the second (2) control PL315 operation and outputs of signals of different time delays to control the operation of thyristors 25, 26, 27, 28 UK6, which are the corresponding outputs of UU8;

- USB bus controller KSh16 with an input (1) of a random sequence of pulses and two outputs (2) and (3) of data for flash memory, which are the corresponding outputs of UU8.

Electrical connections of the claimed device

The output (1) (positive terminal) of the IPT1 direct current source is connected to the power input (1) of the UV2 switching device and the input (1) of the UU8 control device (Fig. 1). The negative terminal (2) of IPT1 is connected to the power output (5) of the NE5 energy storage device and to the power output (5) of the POS7 field-forming system.

The output of the UV2 switching device is connected to the input of the DTZ current divider, and its outputs are connected: weak currents (2) with the power input (2) of the UU8 control device, strong currents with the input of the UD4 damping device.

The outputs of the damping device UD4 are connected to the corresponding power inputs of the energy storage device NE5 and the power inputs of the switching device UK6.

The outputs of the UK6 switching device are connected to the corresponding power inputs of the POS7 field-forming system.

The control outputs of the control unit UU8 are connected to the corresponding inputs of the switching device UK6.

The outputs of the control unit УУ8: the control signal on (7) is connected to the input of the control signal УВ2, the voltage outputs (8) and (9) are connected to the corresponding inputs of the four wire cable 9, the control signal outputs of the USB bus controller (10) and (11) connected to the corresponding inputs of the four-wire cable 9.

The ends of the four-wire cable 9 are connected to the corresponding terminals (1), (2), (3) and (4) of the connector 10, the output of which is designed to connect to the corresponding terminals of the flash memory.

The outputs (2) and (3) GI11 are connected to the input (1) U312 and the input (2) MP14. The output of UZ12 is connected to the input (1) of PLZ15, and its outputs (3), (4), (5), (6) are the outputs of UU8 of UK6 switching control signals.

Input (1) D13 is connected to input ГИ11, which is the corresponding output (9) УУ8, and outputs (2) and (3) ГИ11, respectively, are connected to input (1) У312 and input (2) MP14.

Input (1) MP14 is connected to output (2) D13, input (2) MP14 is connected to output (3) ГИ11, input (6) MP14 is connected to output (1) ИПТ1.

The output (5) of MP14 is connected to input (2) of UV2, the output (3) of MP14 is connected to input (2) of the PL315, and the output (4) is connected to input (1) of the USB bus controller KSh16.

Electrical connections of control unit variant

The first output (2) of the GI11 pulse generator is connected to the input (1) of the UZ12 launcher, and the second GI11 output is connected to the second input (2) of the MP14 microprocessor, and the input (1) to the output (2) of DT3 (Fig. 2).

The output (2) of the trigger device UZ12 is connected to the first input (1) of the programmable delay line PLZ15.

The first output (2) of the voltage divider D13 is connected to the first input (1) of the MP14 microprocessor, the first output (3) of the microprocessor is connected to the second input (2) of the PLZ15 programmable delay line.

The second output (4) of the MP14 microprocessor is connected to the input (1) of the USB bus controller KSh16.

The input (2) of the supply voltage of the control unit UU8 is connected to the inputs of the pulse generator (1) and the voltage divider (1), which are the input (2) of the supply voltage of the control device.

General features of the invention and prototype

Power supply, divider, control unit, USB bus controller (included in the computer), four-pin connector - connector, four-wire cable, the second and third ends of the wires of which are connected to the same terminals of the connector, and the other two ends of these wires are connected to the outputs of the USB bus controller control unit, the first and fourth ends of the wires of which are connected to the same terminals of the connector, and the other two ends of these wires are connected to the outputs of the control unit.

Erasing device operation

Flash memory 33 is installed in the cavity of the frame 34 field-forming system POS7 and connect it to the control unit UU8 using a four-wire cable 9 and connector 10 (figure 4). From contact (7) УУ8, an enable signal is supplied to contact (2) УВ2, contacts (1) and (3) УВ2 are closed (Figures 1 and 2). Then, through the switch-on device UV2, the contacts (1) and (3) of which are closed, supply voltage to the current divider DT3. The current divider DT3 has outputs of weak (2) and strong currents (3) multiples of weak currents. The output (2) ДТ3 and input (2) УУ8 along the circuit does not exceed several milliamps, and the circuit output (3) ДТ3 and input (1) УД4 not more than 3 A.

The current supplied to the input of the damping device UD4 simultaneously feeds four diodes 17, 18, 19 and 20, through which the capacitors 21, 22,23 and 24 of the NE5 energy storage device are charged (Fig. 2) to a voltage value equal to the charge voltage U _s ( fig. 3d). The maximum value of U _s is 95% of the voltage IPT1. At this time, the supply current enters the inputs (1) and (2) of the control unit UU8, which creates a supply voltage at the input of the pulse generator GI11 and the divider D13. This voltage provides at the outputs (2) and (3) GI11 a sequence of GI11 signals with a repetition period of T = t ' ₁ -t ₁ , duration τ _n = t _n -t ₁ and an amplitude equal to U _{c of the} signal (Fig.3b), sufficient to start the programmable delay line PLZ15 (Fig.2), coming from the output of the trigger device UZ12, in which it is formed (Fig.3c) into a control signal in the form of a differentiated signal. At the same time, the current supplied to the D13 divider provides power through a four-wire cable 9, through the wires (1) and (4) of the four-pin connector (connector) 10, the contacts of which (1) and (4) and the volatile memory device connected to it , flash memory 33, as well as the microprocessor MP 14, the input (2) of which receives the signals of a pulse generator GI11 of a rectangular shape (Fig.3b) to start the microprocessor MP14. Microprocessor MP14 in accordance with the algorithm of the program sewn into it via buses (3) and (4) MP14 generates command signals in accordance with the established protocols (forms).

The commands received at the input of the USB bus controller KSH16, provide access signals at the output of gearbox 6, which through a four-wire cable 9 and wires (2) and (3), through the contacts (2) and (3) of connector 10 enter the flash memory 33.

The command signals coming from the MP14 microprocessor via bus (3) to the input (2) of the PLZ15 programmable delay line at the control outputs (3), (4), (5) and (6) create control signals U _у , which (Fig. 3d) in a certain sequence, either in pairs (Fig. 3g) or together, in the switching device UK6, switching thyristors 25, 26, 27 and 28 (Fig. 2). The capacitors 21, 22, 23 and 24 of the NE5 energy storage device at the moment of turning on the thyristors 25, 26, 27 and 28 are discharged in the field-forming POS7 system to the corresponding solenoids 29, 30, 32 and 32 connected to the NE5 capacitors (fig. 3d, 3z). When placing the information carrier, flash memory (Fig. 4) in the device for erasing the recorded information in the cavity of the POS7 field-forming system and when large-value pulsed currents flow in the solenoids 29, 30, 32 and 32, a pulsed magnetic field is formed in them, which is summed in POS7 and irradiates with a total pulsed magnetic field (Fig. 3e, 3i) at various angles of direction of the magnetic field intensity vectors to the plane of the substrate of the microcircuit 33 (flash memory) for a time equal to T ₁ (Fig. 3a). At a point in time (t ₁ + T ₁ ) from output (5) of MP14, respectively, from output (7) of УУ8, a control signal is supplied to input (2) of УВ2 and after erasing the recorded information, it connects the current supply to ДТ3 (Fig. 3a) and the charging process capacitors NE5 (fig.3d, 3z) is repeated. In the conductors of the microcircuit during erasing, T _c ≤T ₁ , which varies depending on the MP14 program placed on its substrate [4, 5], Foucault currents of intensity not less than 60mA arise by irradiating the microcircuit conductors with four varying in amplitude and direction vectors in time by pulsed magnetic fields (figa, b, c, d). Foucault currents unstable charges on the gates of the transistors of the microcircuit, i.e. in the state of excitation and change the structure of the placement of charges, which provides the effect of replacing charges [6] and erasing information in flash memory. This occurs by tunneling and charge removal from a “floating” gate placed in the cell by the “hot electron” injection method. With the tunneling effect, the wave properties of the electron are used. The effect itself consists in overcoming the potential barrier of small "thickness" by the electron. When deleting records, the voltage is supplied to the source, and the control gate selectively negative voltage to the contacts of the connector. The electron cannot overcome the potential barrier and the dielectric layer in the usual way - it lacks energy. When certain conditions are created by the action of pulsed magnetic fields on an inhomogeneous semiconductor data carrier, an electron slips through the dielectric layer (tunnels through it), creating a current that erases the information.

Irradiation with pulsed magnetic fields is performed with intensity vectors at angles α, β, σ. The angle α, depending on the direction of the right or left oblique winding and the type of connection, in-phase or antiphase, take the values α and 180 ° + α or α ₁ and 180 ° -α ₁ (figa).

The distribution of the magnetic field inside the cavity of solenoids with a zigzag winding is shown in figb. With a zigzag winding, the angles β change in the space of the cavity of the field-forming system when observed from points (Fig.5b) placed perpendicular to the longitudinal axis of the cavity, with the right direction of the winding on the right side, the axes change clockwise, taking simultaneously the values of the angle σ, which is between the horizontal plane and the direction of the tension vector describes the arc. With the same winding, the angle β changes in the space of the cavity of the field-forming system when observed from points located perpendicular to the longitudinal axis of the cavity with the right direction of winding on the left side of the axis, while simultaneously changing from the right side counterclockwise, taking simultaneously the values of the angle σ between the horizontal plane and direction of the tension vector. The amplitude value of the intensity of the pulsed magnetic field at each observation point changes and acquires its value from zero to the maximum value of H _max.and .

The angles β during a zigzag winding with a left direction when viewed from points located on the same section of the cavity space of the field-forming system, placed on the perpendicular to the longitudinal axis of the cavity on the right side of the axis, change counterclockwise, taking simultaneously the values of the angle σ between the horizontal plane and the direction of the tension vector, describing the arc. In the same winding direction, on the left side of the axis, the angle β changes clockwise from 0 to 60 °, taking simultaneously the values of the angle σ from 0 to 30 ° at different points of the solenoid.

An example implementation of the claimed device

The device for erasing recorded information is made according to the scheme of figure 2.

A source of type B5-71 was used as a direct current source IPT1 (ratings: current from 0 to 10A, voltage from 0 to 30V).

The UV2 switching device is made on the VTB24-600V triac.

The current divider DT3 is made on a resistor type C2-33.

The damping device is made on diodes of the type 2D133-500-26.

The UK6 switching device is made on 2T143-500-16 type thyristors.

Electrolytic capacitors of the type B43584-A6158M-500V-1500 uF are used in the NE5 energy storage device.

The POS7 field-forming system is made of four solenoids 29, 30, 31 and 32, assembled in the form of a “nesting doll”. The number of turns of each solenoid is 50. The cross section of the copper wire of the winding is 2.5 square mm. The winding of the solenoids is made in two forms: oblique in two solenoids and zigzag in two solenoids.

The solenoid 29 with oblique winding is placed in the solenoid 31 with zigzag winding, then these two solenoids are placed in the solenoid 30 with oblique winding at the opposite winding angle, and then all three solenoids are placed in the cavity of the solenoid 32 with zigzag winding at an angle different from the previous winding angle 180 ° zigzag winding solenoid located inside oblique solenoid winding with opposite winding angle.

The solenoids collected in the POS7 field-forming system passed hot vacuum impregnation with varnish like UR 235 and are coated with an epoxy-based compound.

In the control device UU8 (Fig. 2), the KR1006VI1 chip with the inclusion circuit in the form of a shaper of rectangular pulses from an arbitrary waveform is used as a pulse generator GI11. Differentiating RC circuit with a time constant of 3 ms was used as a trigger device for UZ12 (an RC circuit has a capacitance of C = 1000 μF and a resistance of R = 30 Ohms).

The divider D13 is made on a resistor type C2-33.

Programmable delay line PL315 is made on a chip like DS1045.

The microprocessor MP14 is made on a chip type KR581IK1.

The USB bus controller KSh12 is made on a chip like PD1USBD12.

The four-wire cable 9 is a shielded twisted pair (loop).

As a four-pin connector (connector) 10, an “A” type connector is used, which is used to connect to a PC.

The described design provided reliable erasure of information recording from heterogeneous semiconductor information carriers without the possibility of its recovery due to excitation of charge carriers and the organization of a conductive channel to overcome charge carriers of a potential barrier.

The invention solved the problem of improving the quality of erasing information without the possibility of its recovery, reducing the erasure time, reducing power consumption and its simplification by eliminating the complex and expensive software and hardware complex.

The invention increased the reliability of erasing information - the inability to recover information and reduced the erasure time and energy costs.

List of sources used

1. Nonvolatile Semiconductor Memory Technology. Edited by William D. Brown, Joe E. Brewer. IEEE Press.

2. Description of the invention, No. 777680, class. G11B 3/66, published 1980. “Method for erasing recorded information”.

3. A.Kalyga. USB 2.0 technology., Www.3dnews.ru/storage/169B, - 2 12/24/2003

4. L.D. Landau, E.M. Lifshits. Theoretical Physics, Volume 8, "Electrodynamics of Continuous Media", 1982, p. 281.

5. Ivanov B.N. The laws of physics: Textbook. allowance for preparations. departments of universities. - M .: Higher. school, 1986. - 335 pp., ill.

6. Sandomirsky VB and other mechanisms of residual conductivity. 1973, v. 7, No. 7, p. 1314.

7. Yakubovsky S.V., Barkanov N.A. and others. Analog and digital integrated circuits: a reference guide. - 2nd ed., Revised. and add. - M .: Radio and communications, 1985 .-- 432 p.

Claims (2)

1. A device for erasing recorded information containing a power source, divider, control device, four-pin connector - connector, four-wire cable, the second and third ends of the wires of which are connected to the same terminals of the connector, and the other two ends of these wires are connected to the outputs of the control unit, and the first and fourth ends of the wires of which are connected to the input terminals of the connector, and the other two ends of these wires are connected to the data outputs of the control unit, characterized in that in о introduced a switching device with an output and power and control inputs, a field-forming system containing at least four solenoids, a damping device with a power input and unipolar power outputs by the number of field-forming system solenoids, an energy storage device with power inputs by the number of field-forming system solenoids and one output, a switching device with power, control, and outputs according to the number of solenoids of the field-forming system, and the field-forming system contains a non-magnetic frame and is installed at least four solenoids coaxially on one inside the other, the same number of power inputs and a common output, in addition, the windings of the coils of the first and third solenoids are made with the windings of the windings in the planes of the narrow walls of the frame tilted to its longitudinal ribs at an angle lying within more than zero, but less than 90 °, moreover, the winding of the wires of the coils of the second and third solenoids is made with an inclination in the planes of the wide and narrow walls of the frame at angles lying within more than zero but less than 90 °, the divider is made current with an input and two outputs of strong and weak currents, in addition, the control device has voltage and current power inputs, switching control outputs by the number of field-solenoid diodes of the field-forming system, an on-line control output, two power outputs and two USB bus controller control outputs, with a plus terminal the power source is connected to the power input of the switching device and the power input to the voltage of the control device, and its negative terminal is connected to the power supply output of the energy storage device and to the output of the field generating system topics, in addition, the output of the switching device is connected to the input of the current divider, the output of the low currents of which is connected to the power input by the current of the control device, and its high current output is connected to the input of the damping device, the power outputs of which are connected to the corresponding inputs of the energy storage device and switching device, the outputs of the latter are connected to the corresponding inputs of the field-forming system, the control inputs of the switching device are connected to the corresponding outputs of the control device, and its outputs Nia connected to the two inputs of four-wire cable, the other two inputs of which are connected to the outputs of USB controller bus control, the other ends of the four-wire cable connected to respective terminals of the connector, the output of which is intended for connection to terminals of the flash memory. 2. The device for erasing recorded information according to claim 1, characterized in that the control device comprises: an electric pulse generator with an input of a supply voltage and first and second outputs of a start pulse, a start device with an input and output of a supply voltage, a voltage divider with a power input and outputs : the first is the power supply of the microcontroller and the second is flash memory, the microprocessor with the inputs: the first is the supply voltage, the second is the synchronization and the third is the standby voltage and the outputs: the first is the control signal an adjustable delay line, a second - pulses of a random sequence and a third - a control signal for the operation of the switching device, a programmable delay line with inputs: the first - triggering pulses and the second - controlling its operation and outputs of signals of different time delays for controlling the operation of the switching device, a USB bus controller with a random pulse input and two data outputs for flash memory, the first output of the pulse generator connected to the input of the trigger device, and the second to the second input the microprocessor, the output of the launcher is connected to the first input of the programmable delay line, the first output of the voltage divider is connected to the first input of the microprocessor, the first output of the microprocessor is connected to the second input of the programmable delay line, the second output of the microprocessor is connected to the input of the USB bus controller, the voltage input of the control device is connected with the inputs of the pulse generator and voltage divider, which are the input voltage of the control device.

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