JPS6342070A - Magnetic recording/reproducing device - Google Patents

Abstract

PURPOSE:To quickly and accurately record data by reading recorded data by a reading means which is provided at the downstream side of a writing means in the sliding direction of a magnetic recording medium and comparing data given to the writing means with output data of the reading means. CONSTITUTION:The data recording area of the magnetic recording medium on which data is written is slid on a gap 41 of a reading magnetic head core 27 adjacent to a writing magnetic head core 26. An induced voltage corresponding to write data generated in a coil 30 of the reading magnetic head core 27 is read by a reading head driving circuit 35 and is amplified by an amplifying circuit 38 and is converted to a voltage in the logic level and is applied to one input terminal A of a comparing circuit 24. Meanwhile, input data to a write driving circuit 37 is given to a signal delay circuit 39 also, and the same signal as the output from the amplifying circuit 38 is outputted and is given to the other input terminal B. The comparing circuit 24 compares the output of the read amplifying circuit 38 with the output of the signal delay circuit 39.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording/reproducing apparatus for recording/reproducing data on a magnetic recording medium called a so-called 70 disk.

Prior Art FIG. 5 is a bottom view of the magnetic helad 2 of a conventional magnetic recording/reproducing device (not shown), and FIG. 6 is a front view of the magnetic helad 2. The magnetic head 2 includes a write/read head 3 for writing data to or reading data from a magnetic recording medium (not shown), and a pair of erase heads 4 for erasing the data. The write/read head 3 is
It consists of a head core 6 made of a magnetic material and a coil 7 for magnetizing the head 76, and the erasing head 4 also consists of a head core 8 and a coil 9.

A gap 10.11 is formed in the head core 6 and the head core 8 in order to magnetize the magnetic recording medium.

The head core 8 is formed with a groove 12 having the same width as the width of the write/read spatula 3 in the vertical direction in FIG. The write/read head 3 and the erase head 4 are arranged along the direction of sliding contact with the magnetic recording medium (arrow A2 direction in the fifth figure), are attached to a base 13 made of, for example, a ceramic material, and are integrally formed. is formed.

Problems to be Solved by the Invention When recording/reproducing data on a magnetic recording medium using the conventional magnetic head 2 as described above, it is necessary to check whether the data recorded on the magnetic recording medium is normal. In this case, after data is recorded, the magnetic head 2 must be returned to the starting end of the recording area to perform a read operation, which poses a problem in that the processing time is long.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic recording/reproducing apparatus that can solve the above-mentioned problems and record data at high speed and accurately.

Means for Solving the Problems The present invention provides data recorded by a writing means for recording data in sliding contact with a substantially disk-shaped magnetic recording medium on the downstream side of the writing means along the sliding direction. A comparing means compares the data read by the provided reading means and given to the writing means and the data read by the reading means, and when the respective data are different, the comparing means This is a magnetic recording/reproducing device characterized in that it outputs a signal.

Effect According to the present invention, data recorded on a magnetic recording medium is
A comparing means compares the data read by the reading means provided on the downstream side of the writing means in the direction of sliding contact with the magnetic recording medium and given to the writing means and the output data of the reading means.

Embodiment FIG. 1 is a block diagram showing the electrical configuration of a magnetic recording/reproducing device 20 according to an embodiment of the present invention, and FIG. FIG. 3 is a simplified front view of the magnetic head 21, and FIG. 4 is a side view of the magnetic head 21 seen from the right side of FIG. P2S5. It is a diagram. The magnetic recording/reproducing apparatus 20 of this embodiment will be explained with reference to FIGS. 1 to 4.

The magnetic recording/reproducing device 20 includes a magnetic helad 21, a head drive section 22, a signal processing section 23, a comparison circuit 24, and a switch 25. The magnetic head 21 includes a write magnetic head core 726, a read magnetic head core 27, and an erase magnetic head core 28 made of a magnetic material. A fill 29 is wound around the write magnetic head 726 to magnetize the rad core 26 to the write magnetic head by supplying current, and to magnetize the rad core 26 to the read magnetic head.
A fill 30 is wound around 7, which generates an induced voltage due to the residual magnetism of the magnetized magnetic recording medium. Further, a coil 31 is similarly wound around the erasing magnetic rad core 28. The writing magnetic head core 26, the reading magnetic head core 27, and the erasing magnetic head core 728 are sequentially arranged along the direction of arrow A1 in FIG. 2, and are mounted on a base 32 made of, for example, a ceramic material. fixed,
integrally formed.

The data recording width W1 of the write magnetic head core 726 and the data read width W2 of the read magnetic head core 27 are the same, and a second A groove 33 having the same width as the data reading width W2 is formed along the direction of arrow A1 in the figure.

The head drive unit 22 includes a write head drive circuit 34 for supplying a drive current to the coil 29 of the write magnetic head core 726, and a coil 3 of the read magnetic head core 27.
Reading head drive circuit 3 for reading the induced voltage of 0
5, and an erasing head driving means (not shown).

The signal processing unit 23 receives data to be written from the control circuit 36 and includes a write drive circuit 37 for providing a predetermined signal to the write head drive circuit 34, and a read head drive circuit. 35, and a signal delay circuit 39 that delays a signal input to the writing drive circuit 37 by a predetermined time as described later.

The comparison circuit 24 compares the output from the read amplification circuit 38 and the output from the signal delay circuit 39, and if the outputs are different, outputs a predetermined signal and supplies it to the control circuit 36. Regarding the operation of the magnetic recording/reproducing device 20, the switch 25 has a switching mode that changes depending on whether the magnetic recording/reproducing device 20 is recording data or reproducing data. This will be explained below.

Here, the magnetic recording medium has a second position relative to the magnetic head 21.
Data is recorded by slidingly contacting the magnetic head 21 while being displaced in the direction of arrow A1 in the figure.

When writing data, the data to be recorded on the magnetic recording medium is given to the control circuit 36 from another data processing device (not shown), and the line ! of FIG. 1, the signal is supplied to the write drive circuit 37. At this time, the common terminal 25a of the switch 25 is connected to the terminal 25c! has been done.

The write drive circuit 37 performs predetermined processing on the data and provides the write head drive circuit 34 with a signal corresponding to the data. The write head drive circuit 34 supplies a drive current to the coil 29 wound around the write magnetic Rad core 26 in accordance with the signal. Then, the write magnetic head core 26 is magnetized in accordance with the drive current, and the magnetic recording medium is magnetized by the leakage magnetic flux in the air gap 40 provided at the sliding contact portion of the write magnetic head core 26 with the magnetic recording medium. recorded.

Data recording of the magnetic recording medium on which data has been written by the write magnetic RAD core 26! The i area is in sliding contact with the gap 41 of the read magnetic head core 27 adjacent to the write magnetic head core 26, and is in sliding contact with the gap 41 of the read magnetic head core 27.
An induced voltage corresponding to the write data is generated in the coil 30 of No. 7.

This induced voltage is read by the read head drive circuit 35, amplified by the amplifier circuit 38, and converted into a logic level voltage. Common terminal 2 of switch 25
5 & is connected to the terminal 25c, the output of the amplifier circuit 38 is given to one fog input terminal A of the comparator circuit 24, as shown by line 12 in FIG.

On the other hand, the input data to the write drive circuit 37 described above is input to the signal delay circuit 3, as shown by line i3 in FIG.
9, and in the signal delay circuit 39,
The same content is output with the input data delayed by a predetermined time. The predetermined time is a time period during which the magnetic recording medium is displaced from the gap 40 of the magnetic head core 26 for writing to the gap 41 of the magnetic head core 27 for reading. Therefore, if data has been completely written to the magnetic recording medium by the write magnetic rad core 26, the signal delay circuit 39 outputs the same signal as the output from the amplifier circuit 38. This output signal is applied to one side input terminal B of the comparator circuit 24.

The comparison circuit 24 compares the output of the read amplification circuit 38 and the output of the signal delay circuit 39.

As mentioned above, if data has been completely recorded, the above outputs will be the same and no output will be output from the comparator circuit 24. However, if there are any dust, scratches, etc. on the recording surface of the magnetic recording medium, If there is an abnormality, and a state occurs in which data is not recorded, the output of the signal delay circuit 39 and the output of the amplifier circuit 38 are different, and a predetermined signal is output from the comparison circuit 24. is output, and the signal is the line ! of FIG. 4, the control circuit 36
The control circuit 36 executes a predetermined control to be carried out in the event that a write omission of data as described above occurs. This control can be performed immediately upon occurrence of an abnormality as described above, and can be executed without any time delay.

Next, when reading data, the common terminal 25a of the switch 25 is connected to the terminal 25b. Therefore, the output of the amplifier circuit 38 is given to the control circuit 36, as shown by line No. 5 in FIG. 1, and the control circuit 36 supplies the data to another data processing device to perform desired processing. .

On the other hand, a data erasing signal is applied to the coil 31 of the erasing magnetic core 728 by a drive means (not shown) during the data writing operation described above, and the air gap 40 of the writing magnetic core 26 is applied to the magnetic recording medium. By sliding it into contact with the area, unnecessary erased data remaining in the remaining area other than the area where data is recorded is removed.

Effects As described above, according to the present invention, data can be recorded on a magnetic recording medium at high speed and accurately.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the electrical configuration of a magnetic recording/reproducing device 20 according to an embodiment of the present invention, FIG. 2 is a diagram showing the bottom surface of the magnetic head 21 of the magnetic recording/reproducing device a20, and FIG. 4 is a simplified front view of the magnetic head 21, FIG. 4 is a side view of the magnetic head 21 seen from the right side of PI 42, and tj 45 is a bottom view of the magnetic head 2 of the conventional magnetic recording/reproducing device. FIG. 6 is a front view of the magnetic helad 2. 20... Magnetic recording/reproducing device, 21... Magnetic head, 22... Head driving section, 23... Signal processing section, 2
4... Comparison circuit, 25... Switch, 26... Magnetic head core for writing, 27... Magnetic head core for reading, 29.30... Coil, 32... Base, 34
...Writing head drive circuit, 35...Reading head drive circuit, 36...Control circuit, 37...Write drive circuit, 38...Amplification circuit, 39...Signal delay circuit, 40 .41...Gap agent Patent attorney Number of strokes Keibe part 1 Figure 3 Figure 2] Figure 4

Claims (1)

[Claims] Data recorded by a writing means for recording data in sliding contact with a substantially disk-shaped magnetic recording medium is read by a reading means provided downstream along the sliding direction of the writing means, and the data is read into the writing means. The provided data and the data read by the reading means are compared by a comparing means, and the comparing means outputs a predetermined signal when the respective data are different. Magnetic recording/reproducing device.