JPH0765534A - Magnetic disc with built-in control circuit - Google Patents

Abstract

PURPOSE:To process/control/keep secret data by incorporating a control circuit for controlling or processing necessary data and allowing a control procedure memory means to be set to be able/unable to read the data. CONSTITUTION:A magnetic coupling means 14 with a control circuit 12, a coil 18 and a core 19 and an interface circuit 13 are accommodated in a case 20. A window 15 is brought close to a magnetic disc 17. The magnetic disc 17 is fixed to a hub 16 and coupled to a spindle shaft of a disc driver via the hub. The magnetic disc 17 sends/receives data to/from the control circuit 12 via a magnetic head and coupling means 14. Moreover, the magnetic disc 17 is utilized as a memory means. The memory means is set to be unable or able to read, and a cipher means is installed in the control circuit. Accordingly, the disc is not only useful as a mere memory medium, but able to process and control the data while sending/receiving the data, and also prevent the data from leaking.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a magnetic disk.

[0002]

2. Description of the Related Art Cartridge type hard disks, floppy disks, MDs and the like are storage media used by inserting them into slots of magnetic disk drivers.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide not only a magnetic disk as a simple storage means but also a storage means having control and processing capabilities.

[0004]

[Means for Solving the Problems] In order to solve the above problems,
The present invention relates to a magnetic disc such as a cartridge type hard disc, a floppy disc and an MD, a control circuit including a circuit such as a one-chip microcomputer, a magnetic coupling means for exchanging signals with a magnetic head of a disc driver, and an interface circuit thereof. A magnetic head for writing and reading on the magnetic disk and an interface circuit for the magnetic head, and not only storing and reproducing data on and from the magnetic disk as a storage means, but also the control circuit by the magnetic coupling means and the Provided is a magnetic disk of a disk driver, or a magnetic disk with a control circuit for transmitting and receiving data to and from the disk driver via the magnetic head and the magnetic disk to control or process necessary data. Further, by using a memory that cannot be read or can be set, such as a built-in memory of a one-chip microcomputer, as a storage means for storing the procedure of the control circuit, a part of the software is stored in the magnetic disk. Then, the other is stored in the memory as a program executed by the control circuit, and a part of the software is executed by the device to which the disk driver is connected, and the other is executed by the magnetic disk incorporating the control circuit according to the present invention. You can By doing so, it is possible to prevent plagiarism due to duplication of software. Further, by setting the encryption means and / or the key generation means for inputting a specific key to perform encryption / decryption as the procedure of the control circuit, and encrypting the software or data and storing it in the disk, the software or Data theft can be prevented. Furthermore, by installing a magnet in the rotating part of the disk and installing a coil in the vicinity of its rotation to form a generator, an external power supply means such as a battery is unnecessary.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing an embodiment in which a magnetic disk with a control circuit according to claim 1 of the present invention is embodied on a floppy disk. (16), (17), (15), and (20) are for the hub coupled to the spindle shaft of the disk driver, the magnetic disk, and the magnetic head of the disk driver to be close to the magnetic disk (17). The window and the storage case are shown. Also, (11)
Represents a battery, (12) represents a control circuit, (14) represents a magnetic coupling means, and (13) represents the control circuit (12).
And an interface circuit of the magnetic coupling means (14). Further, (18) and (19) show the coil and core of the magnetic coupling means (14). In the present embodiment, the magnetic coupling means (14) is placed in the storage case (20) at a position in the window (15) where the magnetic head of the disk driver is close to the outermost track or several tracks including it. Fixed, the magnetic disk (17)
It is fixed to the hub (16) in such a size that it occupies the track on its inner circumference. Further, the magnetic coupling means (14) has a coil (18) on the core (19) in a direction perpendicular to the circumference of the magnetic disk (17) capable of magnetically coupling with the magnetic head. It is rolled and arranged. In this embodiment, the device to which the disk driver is connected is
Information is passed through the control circuit (12), the magnetic head and the magnetic coupling means (14),
The magnetic disk (17) can be used as a storage means.

FIG. 2 is a diagram showing another example in which the magnetic disk with a control circuit according to claim (1) of the present invention is embodied on a floppy disk. (16) and (17) and (15)
And (20), (11) and (12) are the same as in the example of FIG.
A hub, a magnetic disk, a window, a storage case, a battery and a control circuit are shown respectively, (24) shows a magnetic head for writing and reading information on the magnetic disk (17), and (23) shows the control circuit ( 12) and an interface circuit of the magnetic head (24). In this embodiment, a magnetic head (2) having the ability to write and read to one or more tracks of the magnetic disk (17).
4), the device to which the disk driver is connected and the control circuit (12) can exchange information by writing or reading information to or from the same track of the magnetic disk (17). .

FIG. 3 (A) shows an example of joining the magnetic coupling means (14) and the magnetic disk (17) in the embodiment of FIG. In this example, the joint portion (35) of the magnetic disk (17) and the core (19) is kept horizontal so as not to hinder the movement of the magnetic head of the disk driver, and the magnetic disk rotates. Is formed. FIG. 3B shows an example in which the magnetic head (24) in the embodiment of FIG. 2 is mounted. In this example, the magnetic head (24) installed on one side of the storage case (20) has a pad (attached to an arm (31) supported by the storage case (20) and pulled by a spring (33). 32) presses the magnetic disk (17) to bring the magnetic head (24) and the magnetic disk (17) into contact with each other.

FIG. 4 shows an example of the interface circuit (13) in the embodiment of FIG. 1 or the interface circuit (23) in the embodiment of FIG. 2, and FIG. 5 shows the signal waveform of each point. (40), (41), (42), (44),
(45), (46), and (48) represent a flip-flop, a driver amplifier, a preamplifier, a differentiator, a comparator, a pulse shaper, and a coil, respectively. 1 or 2
The write data (FIG. 5 (A)) written in the magnetic coupling means (14) or the magnetic head (24) by the control circuit (12) in the embodiment of FIG.
0), and its output (FIG. 5B) is input to the driver amplifier (41). The output of the driver amplifier (41) (FIG. 5C) is input to the magnetic coupling means (14) or the coil (48) of the magnetic head (24),
Writing to the magnetic head of the disk driver or the magnetic disk (17) is performed (FIG. 5D). The signal detected by the coil (48) from the magnetic head of the disk driver or the magnetic disk (17) is:
After being input to the preamplifier (42) and amplified (see FIG. 5).
(E)), is output to the differentiator (44), is differentiated, and is input to the comparator (45) (FIG. 5 (f)). In the comparator (45), comparison with the threshold value is performed, and a pulse of 1 or 0 is sent to the pulse shaper (46) (FIG. 5 (g)). The pulse shaper (46) detects the rising and falling edges of the input pulse, generates pulses at those timings, and creates read data to be sent to the control circuit (12) in the present embodiment (Fig. 5 ( H)).

Another embodiment of the magnetic coupling means (14) of the present invention is shown in FIG. In this embodiment, the magnetic coupling means (1
This is an example of manufacturing the coil as 4) using a printing technique used for manufacturing integrated circuits and the like. The coil (61) is drawn concentrically on the surface of the substrate (69), and both ends thereof are taken out as connection terminals. (60) represents a window for magnetically coupling with the magnetic head of the disk driver. The substrate (69) can have higher sensitivity by using a core made of a magnetic material. Further, the coil (61) may be printed by forming the substrate (69) into a multi-layered structure to form a magnetic coupling means with higher sensitivity. This embodiment and its application can be mass-produced, and by increasing the degree of integration, it is possible to inexpensively supply magnetic coupling means having high sensitivity.

FIG. 7 shows an example in which the coil of the magnetic coupling means (14) is embedded in the surface of a substrate such as a core made of a magnetic material to improve the detection sensitivity. (72) is the surface of the substrate,
(73) shows the cross section of the coil, and (74) shows the substrate.

FIG. 8 shows an example of a circuit diagram of a magnetic disk having a control circuit according to the present invention. (80) and (81) and (8
Reference numerals 2), (83) and (84) respectively denote a battery, a one-chip microcomputer, a memory, an interface circuit, a magnetic coupling means (14) or a coil of a magnetic head (24), and (85) and (86). And (87) and (88) and (8
9) is a write data line and a read data line for connecting the one-chip microcomputer (81) and the interface circuit (83), and a control line, an address line and a data line for connecting the one-chip microcomputer (81) and the memory (82), respectively. Show. In the example of the circuit diagram, the one-chip microcomputer (81), the memory (82) and the interface circuit are supplied with power from the battery (80). The one-chip microcomputer (81) processes or controls the information input from the interface circuit (83) and / or the information recorded in the memory (82), and stores necessary data in the memory (8).
2) or send to the interface circuit (83) from the write data line (85). The interface circuit (83) sends the information detected by the coil (84) from the read data line (86) to the one-chip microcomputer (81), and the information processed by the one-chip microcomputer (81) or the information of the memory (82). Can be received from the write data line and sent to the coil (84) to transmit information to the disk driver.

FIG. 9 shows an embodiment according to claim (2). (90), (91), (92), (93), and (9
4) shows a battery, a one-chip microcomputer having a built-in memory that cannot be read or can be set, a built-in memory, an interface circuit, and a coil, respectively. Further, (95) and (96) indicate a read data line and a write data line, respectively. In this embodiment, the one-chip microcomputer (91) and the interface circuit (93) are supplied with power from the battery (90), and the one-chip microcomputer (91) receives the interface circuit (93) and the read data line (95). In addition to processing the information input from, the built-in information that cannot be read or is stored in the memory that can be set, or the program stored in the memory is executed to write the necessary data to the write data line. Interface circuit from (96) (93)
Information can be transmitted to the disk driver.

FIG. 10 shows an embodiment according to claim (3). In this embodiment, a one-chip microcomputer (101) as a control circuit, a memory (103) for storing a program in which an encryption means and / or a key generation means are stored,
A non-readable memory (102) for storing a secret key or a key generated by executing a program in which the key generating means is described is provided. Reference numerals (104) and (105) denote a read data line and a write data line, respectively. By using the magnetic disk with a built-in control circuit according to the present embodiment, information of the disk driver input from the read data line (104) is stored in the memory (10).
The program storing the encryption means stored in 3) can be executed to encrypt the encrypted data, and the encrypted data can be sent back to the disk driver from the write data line.
It is possible to store the encryption key used for encryption in the unreadable memory (102) and keep it secretly. Further, by storing the program in which the key generation means is described in the memory (103), it is possible to realize a high-level secret device that makes it unnecessary for a user of the device to know the key while setting the key is unnecessary. You can do it.

FIG. 11 shows an embodiment according to claim (4). In this embodiment, a magnet (114) is fixed to a hub (16) for coupling with a spindle shaft of a disk driver, and a coil () is provided near a storage case (20) through which the magnet (114) rotates and passes. 113) is installed and comprises a circuit (111) connected by a wire (112). FIG. 12 shows an example of a circuit diagram in this embodiment, and FIG. 13 shows signal waveforms at respective points. In FIG. 12, (113), (122), (123), and (124)
And (125), (126), (127), (128), and (129) represent the coil, the center tap of the coil, the diode, the diode, the capacitor, the resistor, the transistor, the voltage detection control IC, and the load, respectively. . When the magnetic disk with a built-in control circuit according to the present invention is inserted or installed in the disk driver, the hub (16) coupled to the spindle shaft of the disk driver rotates and at the same time, is fixed to the hub (16). The magnet (114)
Is the coil (1) installed in the storage case (20).
It rotates while passing near 13). At this time, induced electromotive force (Fig. 13 (a)) is applied to both ends of the coil (113).
Is generated, rectified by the diodes (123) and (124) and the capacitor (125) (FIG. 13B), and sent to the resistor (126). The voltage sent to the resistor (126) is applied to the transistor (127) and the voltage detection control IC (1
28), the voltage is converted to a constant voltage (FIG. 13C), and the voltage is sent to the load (129). In this embodiment, the coil (11
Although an example with an intermediate tap is shown in 3), any coil may be used, such as a coil without an intermediate tap, a coil using a core, or a spiral coil. In addition, the magnetic coupling means or magnetic head of the magnetic disk with a built-in control circuit according to the present invention may be a magnetic head of a disk driver or a magnetic disk of a disk driver, such as a semiconductor element whose resistance value is changed by magnetism, as long as it writes or reads information. anything is fine. Moreover, you may comprise them in multiple numbers.

[0015]

As described above in detail, according to the present invention, the magnetic disk such as the cartridge type hard disk, the floppy disk or the MD is not a mere storage medium, but at the same time, the information is processed while passing the information to and from the disk driver. And it was possible to control. Further, by incorporating a memory that cannot be read out, it becomes impossible to copy the software, and by incorporating an encryption means or a key generation means, the magnetic disk with a control circuit according to the present invention encrypts information. While it was possible to remember. Furthermore, by incorporating a generator with a magnet and a coil, an external power supply is unnecessary.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing another embodiment of the present invention.

FIG. 3 is a diagram showing an embodiment of a magnetic coupling means and a magnetic head.

FIG. 4 is a diagram of an embodiment of an interface circuit.

FIG. 5 is a diagram of signal waveforms in the interface circuit.

FIG. 6 is a diagram of an embodiment of magnetic coupling means.

FIG. 7 is an example of a cross-sectional view of magnetic coupling means.

FIG. 8 is an example of a circuit diagram.

FIG. 9 is another example of a circuit diagram.

FIG. 10 is a diagram of a one-chip microcomputer that incorporates encryption means.

FIG. 11 is a diagram showing an embodiment in which a generator is incorporated.

FIG. 12 is a circuit diagram of a generator.

FIG. 13 is a diagram of a signal waveform in a generator circuit.

[Explanation of symbols]

 11 Battery 12 Control Circuit 13 Interface Circuit 14 Magnetic Coupling Means 15 Window 16 Hub 17 Magnetic Disk 18 Coil 19 Core 20 Storage Case 23 Interface Circuit 24 Magnetic Head 31 Arm 32 Pad 33 Spring 35 Joint 40 Flip Flop 41 Driver Amplifier 42 Preamplifier 44 Differentiator 45 Comparator 46 Pulse shaper 48 Coil 60 Window 61 Coil 69 Substrate 72 Substrate surface 73 Coil cross section 74 Substrate 80 Battery 81 One-chip microcomputer 82 Memory 83 Interface circuit 84 Coil 85 Write data line 86 Read data line 87 Control line 88 address line 89 data line 90 battery 91 one-chip microcomputer 92 memory 93 interface circuit 94 coil 95 read data line 96 write data line 101 one-chip microcomputer 102 unreadable memory 103 memory 104 read data line 105 write data line 111 circuit 112 line 113 coil 114 magnet 122 coil intermediate tap 123 diode 124 diode 125 capacitor 126 resistance 127 Transistor 128 IC for voltage detection control 129 Load data data Flip-flop output C Write current D Remanent magnetic flux Read voltage F Differentiator output Q Comparator output Q Pulse shaper output (a) Induced electromotive force (b) Rectified waveform (c ) Constant voltage waveform

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Claims (4)

[Claims] 1. A magnetic disk on which information is written and read by a magnetic head of the disk driver, a control circuit for controlling and processing according to a preset procedure, or having a storage capacity, and a magnetic disk of the disk driver. A magnetic coupling means for exchanging signals with the head, an interface circuit for the magnetic coupling means and the control circuit, and / or a magnetic head for writing and reading information to and from the magnetic disk, and an interface circuit for the magnetic head and the control circuit. , A magnetic disk with a built-in control circuit, which has a built-in power supply. 2. The magnetic circuit with a built-in control circuit according to claim 1, wherein the control circuit according to claim 1 further comprises a storage unit that cannot be read or can be set. disk. 3. The control circuit according to claim 1, further comprising setting an encryption means and / or a key generation means as a procedure in the control circuit according to claim 1. Built-in magnetic disk. 4. The rotating unit fixed to a spindle (rotating shaft) of a disk driver, the magnet attached to the rotating unit, and the vicinity of the passage of the magnet. It is further characterized by comprising a coil installed and a circuit for extracting a necessary voltage or current from the induced electromotive force generated in the coil.
A magnetic disk having a control circuit according to (3).