JPH01260680A - Information signal recording and reproducing system using magnetic recording medium disk obtaining tracking control information by detecting change of electrostatic capacity value - Google Patents

Abstract

PURPOSE:To prevent crosstalk mutually generated between magnetic heads by disposing the respective magnetic heads so as to situate the central parts of recording traces at different positions for every one of a plurality of magnetic recording and reproducing areas formed between the sequential recording traces by a tracking reference signal. CONSTITUTION:N simultaneous signals are supplied to the N magnetic heads Mh1, Mh2..., each consisting of one magnetic head capable of forming the recording traces having the central positions situated at the mutually different positions for every one of the N (N is a natural number higher than 2) flat magnetic recording and reproducing areas MD having respective width of Tm formed between the adjacent recording traces tp according to the tracking reference signal in a disk D to form the N recording traces during the N rotations of the disk D. Thereby, the crosstalk between a plurality of the magnetic heads can be prevented mutually.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an information signal recording and reproducing method using a magnetic recording medium disc in which tracking control information can be obtained by detecting changes in capacitance values.

(Prior Art) As the demand for recording various information signals at high recording densities has increased, in recent years, information recording media created based on various structural and operating principles have been used to record information signals at high recording densities. It is well known that high-density recording and reproduction of information has become possible. For example, information signals are recorded by forming irregularities on the signal surface of an information recording medium according to the information signal, Recording and reproducing devices that reproduce signals by optical means or by detecting changes in capacitance are already in practical use for recording and reproducing video and audio signals, and In order to meet the demands for high-density recording and reproduction in various technical fields, by irradiating the recording layer of the information recording medium with a beam whose intensity is modulated by the information signal, the recording layer of the information recording medium can be made to respond to the information signal. Research has also begun on information recording media in which information signals are recorded by causing physical or chemical changes, but in recent years in particular, it has become easier to obtain semiconductor lasers that operate stably. As it became.

It is well known that various types of optical discs that perform high-density recording and reproduction using laser light have already been put into practical use, or research and development for their practical use is currently underway.

Now, as the demand for recording various information signals at high recording densities in many technical fields has increased, in recent years there has been an increase in the demand for recording information using information recording media made based on various structural and operating principles. High-density recording and reproduction of signals has been attempted, and optical discs that can be added once by the user (write-once optical discs) and erasable optical discs have been developed for practical use in office file memories and other uses. Research and development has been actively carried out for this purpose, and up until now, even write-once optical discs and erasable optical discs have been developed. When classified based on whether information signals are recorded by change, the pit-forming type, bubble or unevenness-forming type, magneto-optical type, and phase change type (light transmittance 1 reflectance due to thermal energy) are classified.

Various formats have been proposed, such as thermal transformation type (which causes changes in absorption rate, etc.), as well as information recording media in which recording and reproducing operations are performed using energy other than light. It is well known that many proposals have been made, and one of these proposals is to form irregularities on the signal surface of the disk according to the tracking reference band 1 to racking reference band, and to generate the tracking reference signal. There is also known a system in which the tracking reference signal is read out as a change in the capacitance value to perform the racking control operation, and magnetic recording is performed in the flat area between the recording traces formed by the pit row of the tracking reference signal. (Tokuko Sho 63-4272)
(see publication).

By the way, it is well known that a wideband video signal is required to obtain a reproduced image with high resolution.On the other hand, when looking at the transmission, recording and reproduction of video signals, the frequency band of the video signal is Since it is desirable to have a narrow band, various techniques for narrowing the band using human visual characteristics, multiplex communication technology, and other technologies have been effectively utilized to realize narrow band of video signals. It is well known that video signals are being used for transmission, recording and reproduction, and an example of the conventional technology for narrowing the bandwidth of video signals is the human visual characteristic of color. Color signals narrowed by using
The color television system (NTSC system, F A
When it comes to recording and reproducing color video signals, video signals that undergo signal processing using the video signal narrowband technology described above have traditionally been used. There is usually one.

On the other hand, as the field of application of video signal recording and reproducing technology to image files such as still image files has expanded in recent years, there has been a demand for higher quality reproduced images. In the case of recording and reproducing narrowband video signals as explained in the prior art described above,
Naturally, it is difficult to obtain high-resolution playback images, so instead of recording and playing back video signals with a narrow band as in the past, we are recording and playing back video signals with a wider band. Therefore, it has become possible to obtain high-resolution reproduced images.

As one of the video signal recording and reproducing apparatuses that can obtain reproduced images with high resolution, the present applicant's company, for example, separately records three simultaneous signals corresponding to each of the three primary colors of additive color mixture. A video signal recording and reproducing device that uses a recording and reproducing element to record on a recording medium and reproduce it from the recording medium, or a recording device that records and reproduces HDTV and other wideband video signals as simultaneous signals of multiple channels. We are conducting experimental research on playback equipment.

(Problems to be Solved by the Invention) As in the above example, when multiple signals are magnetically recorded at high density as simultaneous signals and then reproduced,
As described in Publication No. 3-4272, a tracking control operation is performed by forming irregularities in advance on the signal surface of the disk in accordance with a tracking reference signal, and reading out the tracking reference signal as a change in capacitance value. Attempts have been made to record and reproduce data using disks that can be used in a similar manner, but if the recording and reproduction of multiple signals is performed by separate recording and reproduction elements each equipped with a reproduction needle and a magnetic head, Naturally, the configuration becomes complicated, and also, since the disc is to be used for simultaneous recording and reproduction of multiple signals, the unevenness corresponding to the tracking reference signal must be formed on the signal surface of the disc in advance. Since a large number of recording traces will be required, a solution to this problem was sought, so the applicant company has developed a magnetic recording system that can obtain racking control information by detecting changes in capacitance. Let Tm8-p be the recording trace interval of the sequential recording traces formed by the tracking reference signal formed by the change in the geometrical shape on the medium disk, and let the above-mentioned 1-racking reference signal be expressed as the change in capacitance value. Let Ew be the electrode width of the electrode provided for detection, and furthermore, let Ew be the flat magnetic field formed between the sequential recording traces of the tracking reference signal formed by the above-mentioned changes in the geometrical shape. When 11 of the recording/reproducing area is Tm, the above-mentioned Tp, Ew
, within the width Tm of the flat magnetic recording/reproducing area formed between the electrode l having the relationship Tm≦Ew≦Tp between Tm and the sequential recording traces by the tracking reference signal described above. A change in capacitance is detected by a recording/reproducing element equipped with a plurality of magnetic heads arranged so as to simultaneously form a plurality of recording traces, and an electrode in the aforementioned recording/reproducing element. A capacitance value comprising means for controlling tracking of a recording/reproducing element based on a tracking reference signal, and means for recording or reproducing individual information signals using a plurality of magnetic heads in the aforementioned recording/reproducing element. proposed a method for recording and reproducing information signals using a magnetic recording medium disc in which tracking control information can be obtained by detecting changes in the
In this proposed method, a plurality of magnetic heads simultaneously record data in one of the flat magnetic recording/reproducing areas formed between sequential recording traces of tracking reference signals formed by changes in geometric shapes. Because the system was designed to form multiple recording tracks, there were problems with crosstalk between multiple magnetic heads, and a structure in which multiple magnetic heads were arranged in a predetermined manner in a minute area. Since the recording/reproducing element of 2000 has problems such as being difficult to manufacture, it has been desired to find a solution for improving it.

(Means for Solving the Problems) The present invention provides sequential tracking control information based on tracking reference signals formed by changes in the geometrical shape of a magnetic recording medium disk in which tracking control information is obtained by detecting changes in capacitance. The recording trace interval of the recorded traces is Tp, the electrode 11 provided for detecting the tracking reference signal as a change in capacitance value is Ew, and the geometric shape described above is 11 of the flat magnetic recording/reproducing area formed between the sequential recording traces formed by the tracking reference signal due to the change in T.
When m is Tp, Ew described above.

A flat magnetic recording/reproducing area having a width of Tm to be formed between an electrode having an electrode width such that the relationship Tm≦Ew≦Tp and the sequential recording traces by the above-mentioned tracking reference signal. N pieces (however, N is 2
one magnetic head is arranged for each one of the above natural numbers) so as to form a recording trace in which the center of the recording trace is located at a mutually different position. a recording/reproducing element; a means for controlling tracking of the recording/reproducing element based on a tracking reference signal detected as a change in capacitance by an electrode in the recording/reproducing element; and a plurality of magnetic fields in the recording/reproducing element. A method for recording and reproducing information signals using a magnetic recording medium disc in which tracking control information can be obtained by detecting changes in capacitance value, which is equipped with means for recording or reproducing individual information signals by means of a head, and an electrostatic Let Tp be the interval between successive recording traces formed by a tracking reference signal formed by a change in the geometric shape of a magnetic recording medium disk from which tracking control information is obtained by detecting a change in capacitance value, and the above-mentioned tracking Let Ew be the electrode width of the electrode provided for detecting the reference signal as a change in capacitance value, and furthermore, let Ew be the electrode width of the electrode provided to detect the reference signal as a change in capacitance value, and furthermore, the sequential recording trace by the tracking reference signal formed by the change in the geometric shape described above. An electrode having an electrode width such that when the width of the magnetic recording/reproducing area is Tm, the flat surface formed between the electrodes has the relationship Tm≦Ew≦Tp between the above-mentioned 'l'p, Ew, and Tm. and TI of Tm to be formed respectively between the sequential recording traces by the tracking reference signal described above] of N flat magnetic recording/reproducing areas (N is a natural number of 2 or more). Tracking is performed by detecting changes in capacitance by arranging one magnetic head for each object, forming a recording trace with the center of the recording trace located at a different position. The present invention provides a recording/reproducing element for an information signal recording/reproducing method using a magnetic recording medium disk from which control information can be obtained.

(Example) Hereinafter, specific contents of the recording and reproducing method of information signals using a magnetic recording medium disk in which tracking control information is obtained by detecting changes in capacitance value of the present invention will be explained in detail with reference to the attached drawings. explain.

In the accompanying drawings, FIG. 1 is a block diagram of an embodiment of an information signal recording/reproducing method using a magnetic recording medium disk in which tracking control information is obtained by detecting changes in capacitance according to the present invention, and FIG. Figures 3 to 9 are diagrams for explaining how recording marks are formed by a tracking reference signal on a magnetic recording medium disk in which tracking control information is obtained by detecting a change in capacitance value. FIG. 3 is a diagram for explaining the correspondence between recording/reproducing elements and recording traces on a disc.

First, in Figure 1, D is a magnetic recording medium disk (disk).
On this disk D, a recording trace tp( 3, 4, and 7), the recording trace tp by the 1-ranking reference signal on the disk D described above is illustrated in FIGS. 2 and 3, for example. As shown in the figure, a flat magnetic recording/reproducing area MD having a width of Tm is formed every revolution from a specific radial position z-7 to a specific radial position z-Z on the disk D. The recording trace interval Tp (Tp>Tm) is provided.

The recording trace tp by the tracking reference signal described above is, for example, higher than the occupied frequency band of the information signal to be recorded and reproduced in the main recording trace for magnetic recording and reproduction provided in the flat magnetic recording and reproduction area MD having the width Tm described above. Two types of tracking reference signals f p 1 + f p 2 (
Hereinafter, the recording traces for each one of the signals fpl and fp2 are formed at a recording trace interval T p (T p > T m ); 2. In the disc D having the recording trace pattern shown in FIG. 2, two types of tracking reference signals fpl,
fp2 is a specific radial position 2-2 on disk D
(For example, a specific signal fp3 may be recorded at this position.) One of the fidgets is the tracking reference signal fpl,
One of fP2 is shown, and the other of the circles and triangles in the figure is the tracking reference signal fpl.
, fp2).

The disk D is fixed by a clamper C to a turntable TT that is rotationally driven by a drive motor Md, and the drive motor Md is rotated at a predetermined rotation speed by a disk servo circuit (not shown), that is, the period of a reference synchronization signal. The information signal is recorded and reproduced by the recording/reproducing element RP while being driven and rotated by the driving motor Md, which rotates at a constant rotation period having an integer ratio.

As illustrated in FIGS. 3 to 9, the recording/reproducing element RP described above includes an electrode portion E (electrode E), and a plurality of magnetic heads M h 1. for recording and reproducing information signals on the magnetic recording medium of the disk D. It is composed of M h 2...

That is, the recording/reproducing element RP illustrated in FIGS. 3 to 9 records sequential recording traces tp, t by the tracking reference signal formed by changing the geometric shape.
Let the recording trace interval of P... be 'rp, and let Ew be the electrode width of the electrode E provided for detecting the tracking reference signal as a change in capacitance value, and furthermore, let the above-mentioned geometrical When the width of the flat magnetic recording/reproducing area formed between the sequential recording traces based on the ranking reference signal is Tm, the above-mentioned Tp, Ew , each width formed between an electrode E having an electrode width Ew such that Tm≦Ew≦Tp and the sequential recording traces by the tracking reference signal described above is formed as Tm. For each of the N flat magnetic recording and reproducing areas MD (where N is a natural number of 2 or more), the center of the recording trace is located at a different position from each other. Each one magnetic head Mhl can be formed.

Mh2...

In the figure, D is the disk, Pw is the width of the pit based on the tracking reference signal (width in the radial direction of the disk D), and Gw is the non-recording part (girt band) formed between adjacent magnetic heads.
In addition, Tw is the recording trace formed by each magnetic head.

The recording/reproducing element RP shown in FIG.
The illustrated perspective view shows an example of a composite recording/reproducing element composed of an electrode E and two magnetic heads Mhl and Mh2, a part of which is shown in FIG. The illustrated recording/reproducing element RP includes an electrode E and three magnetic heads Mh, as partially shown in the perspective view of FIG. 5(c), for example.
This is an example in which the recording/reproducing element RP shown in FIG. An example of the structure of the recording/reproducing element RP when configured as a type head is shown in FIG. 6, where 8 is a coil, 9 is a thin film upper core, and 10 is a thin film lower core.

Furthermore, the recording/reproducing element R shown in FIGS. 8 and 9
P is an example of the configuration of a recording/reproducing element in which individual magnetic heads are connected by a connecting member, and in these figures ε, SA is a support member, and this support member SA is the movable part of the actuator. The movable part 17 of the actuator is provided with a hole 13.14 that engages with the pivot 11.12 protruding from the actuator. The supporting member SA and the movable part 17 of the actuator are connected by the attractive force between the permanent magnet 15 provided on the supporting member SA and the permanent magnet 16 provided on the supporting member SA.

The recording/reproducing element RP shown in FIGS. 8 and 9
18 is rubber for damping, 19 is a rotating shaft, 2
0 is a connecting member, and the plurality of magnetic heads used in the structure of the recording/reproducing element are used in a manner that they are lined up above the disk D, and the rotation of the rotation shaft 19 is Through the four operations, the sliding contact between each magnetic head and the electrode E and the surface of the disk D is made good.

Note that the recording and reproducing method of information signals using a magnetic recording medium disk in which tracking control information is obtained by detecting changes in capacitance value according to the present invention may be implemented by a perpendicular magnetic recording method; In this case, a recording/reproducing element may be constituted by a plurality of magnetic heads and electrodes for the perpendicular magnetic recording/reproducing method.

In the recording/reproducing element RP illustrated in FIG. 7, the azimuth angles of mutually adjacent magnetic heads Mhl, Mh2, . . . arranged in different flat magnetic recording/reproducing areas MD are This seventh recording/reproducing element RP is arranged so as to take different specific angles (10, -0 in the example in the figure).
In the recording/reproducing element RP illustrated in the figure, a plurality of magnetic heads Mh1. ．． There is no need to construct a guard band between adjacent ones in Mh2....

3 to 5 and 7 are diagrams explaining the correspondence between the recording/reproducing element RP and the recording traces of the disc D, and these figures show that the recording/reproducing element RP is provided thereon. Tracking control is performed so that the reproduction outputs of the two types of tracking reference signals reproduced by the electrodes E are equal, so that every N rotations of the disk D, a recording trace jP* due to the adjacent tracking reference signals is generated. Width Tm of the flat magnetic recording/reproducing area MD formed between tp
It is illustrated and explained that a plurality of recording marks are simultaneously formed by a plurality of magnetic heads Mhl, Mh2, . . . provided in the recording/reproducing element RP.

That is, in the recording and reproducing method of information signals using a magnetic recording medium disk in which tracking control information is obtained by detecting changes in capacitance value according to the present invention, tracking control information can be obtained by detecting changes in capacitance value. Recording using a tracking reference signal on a disk D in which a recording trace tp (see FIGS. 3 to 5, and 7) using a tracking reference signal is provided in advance by an arrangement of changes in geometrical shape (pits). For each one of the N flat magnetic recording/reproducing areas MD (where N is a natural number of 2 or more), each of which has a width Tm between adjacent traces tp, One magnetic head M h 1. Each magnetic head is capable of forming recording traces whose centers are located at mutually different positions. N magnetic heads Mhl consisting of Mh2...

By supplying N simultaneous signals to Mh2..., disk D
For this purpose, the electrode E to be provided on the recording/reproducing element RP has an electrode width Ew equal to the recording trace tp caused by the tracking reference signal. , that is, the interval between the recording traces by the tracking reference signal (
1-rack pitch) with respect to Tp such that Ew≦Tp is used, so that a tracking reference signal that allows good tracking control of the recording/reproducing element RP can be reproduced by the electrode E, thereby In a flat magnetic recording/reproducing area MD with a width T m (Tp)Tm) formed between adjacent recording traces tp by the tracking reference signal, a plurality of recording/reproducing elements for magnetic recording/reproducing in the recording/reproducing element RP are provided. Magnetic head M h1. M h
2... ensures that N main recording traces are correctly formed by N rotations of the disk D.

Now, as shown in FIG.
The sensor is attached to the sensor and is driven and displaced according to the tracking control signal. Further, the rotating shaft 4 of the transfer motor Mf shown in FIG. There is.

A transfer body FA to which an actuator ACT is attached is engaged with the feed screw 6, and as the feed screw 6 is rotationally driven, the transfer body FA is fed while being guided by the guide rod 7. It is transferred as the screw 6 rotates.

In FIG. 1, SWI to SWn are recording/reproducing switch;
P r A t is a preamplifier for the tracking reference signal detected as a change in capacitance value by the electrode portion E in the recording/reproducing element RP described above, and the tracking reference signal output from this preamplifier P r A t is The signal is supplied to a tracking control circuit TSC.

Then, the tracking control signal generated by the tracking control circuit TSC is supplied to the actuator ACT, and the low-frequency signal component of the tracking control signal is supplied to the transport motor Mf, so that when recording and reproducing by the recording and reproducing element RP, Therefore, the position control of the recording/reproducing element is performed correctly. In the above operation, the timing of switching the tracking control signal at a specific radial position of the disk D is 1, for example, the previously described signal fp3 recorded on the disk D, or another signal is used.

In the information signal recording/reproducing method using a magnetic recording medium disk in which tracking control information is obtained by detecting changes in capacitance value according to the present invention shown in FIG. The movable contacts of the switches SWI to SWn are switched to the fixed contact R side, and when the regeneration mode is set, the movable contacts of the changeover switches SWI to SWn are switched to the fixed contact P side.

In recording mode, multiple signal sources SGI to SGn
The signals generated by the respective modulators (MOD
After the signal is made into a signal suitable for recording by one of I to M OD n), the corresponding recording amplifier (RA
I to RAn), and the fixed contacts R of the corresponding changeover switches SWI to SWn
and a movable contact to a magnetic head (corresponding one of Rh 1 =24- to Rhn) in the recording/reproducing element RP.

At this time, since the recording/reproducing element RP is subjected to tracking control so that the reproduced outputs of the two types of tracking reference signals reproduced by the electrode E provided thereon are equal, the recording/reproducing element RP is A plurality of magnetic heads Mho.

M h2... is 1 for each of N flat magnetic recording/reproducing areas MD with a width Tm formed between recording traces tp and tP based on adjacent 1 to racking reference amounts on the disk D. A total of N recording traces are simultaneously formed in the N flat magnetic recording/reproducing areas MD by forming recording traces one by one, and when the disc D completes N rotations, N recording traces are formed in the flat magnetic recording/reproducing area MD having a width of ``m'' between the recording traces tp and tp formed by adjacent tracking reference signals.

Next, in the reproduction mode, since the recording/reproducing element RP is subjected to tracking control so that the reproduction outputs of the two types of 1 to racking reference signals reproduced by its electrode E are equal, the recording/reproducing element RP A plurality of magnetic heads Mhl, Mh2, etc. provided in the RP are arranged in a flat magnetic recording/reproducing area MD with a width Tm formed between recording traces jpy tP based on adjacent tracking reference signals.
The signal is reproduced from each recording trace in each magnetic recording area MD, and N signals are simultaneously reproduced from a total of N recording traces in N flat magnetic recording/reproducing areas MD.

The above playback signals are selected by the corresponding changeover switch S.
It is supplied to the corresponding one of the preamplifiers PrAl to PrA n through the movable contacts of WI to SWn and the fixed contact P, and is amplified, and then the preamplifier Pr
The output signals from A1 to P r A n are demodulated by demodulators DEMI to D E M n provided correspondingly, respectively, and output to the corresponding output terminals 1, 2 .
...is output.

(Effects of the Invention) As is clear from the above detailed explanation, the method for recording and reproducing information signals using a magnetic recording medium disk in which 1-hertzing control information can be obtained by detecting changes in capacitance according to the present invention is as follows. , where Tp is the recording trace interval of successive recording traces formed by a tracking reference signal formed by a change in the geometric shape of a magnetic recording medium disk from which tracking control information is obtained by detecting a change in capacitance value; The electrode width of the electrode provided to detect the above-mentioned tracking reference signal as a change in capacitance value is E.
w, and furthermore, l of the flat magnetic recording/reproduction area formed between the sequential recording traces of the tracking reference signal formed by the above-mentioned changes in the geometrical shape.
When Tm is Tm, each electrode is formed between an electrode l having a relationship of m≦Ew≦Tp between Tp+Ew and Trn described above, and the sequential recording traces by the tracking reference signal described above. N flat magnetic recording/reproducing areas with rlJ of Tm to be recorded (where N is 2
For each one of the above natural numbers), one magnetic helad is arranged in a vine-like manner to form a record trace in which the center of the record trace is located at a different position. a recording/reproducing element; a means for controlling tracking of the recording/reproducing element based on a tracking reference signal detected as a change in capacitance by an electrode in the recording/reproducing element; A method for recording and reproducing information signals using a magnetic recording medium disc in which tracking control information can be obtained by detecting changes in capacitance, and a method for recording and reproducing information signals using a magnetic recording medium disk, which is equipped with means for recording or reproducing individual information signals using a magnetic head. A recording trace interval of sequential recording traces formed by a tracking reference signal formed by a change in geometric shape in a magnetic recording medium disk from which tracking control information is obtained by detecting a change in capacitance value is defined as T p; Let Ew be the electrode width of the electrode provided to detect the above-mentioned tracking reference signal as a change in capacitance value. When the width of the flat magnetic recording/reproducing area formed between the recording traces is Tm,
Tp and Ew mentioned above.

A flat magnetic recording/reproducing device having a width of Tm formed between an electrode having an electrode width such that Tm≦Ew≦TP and the sequential recording traces by the above-mentioned tracking reference signal. N areas (N is 2
one magnetic head is arranged for each one of the above natural numbers) so as to form a recording trace in which the center of the recording trace is located at a mutually different position. This is a recording/reproducing element for an information signal recording/reproducing method using a magnetic recording medium disc in which tracking control information is obtained by detecting a change in capacitance value, and tracking control information is obtained by detecting a change in capacitance value according to the present invention. In the information signal recording and reproducing method using a magnetic recording medium disc that can obtain the following, high-density recording and reproducing of signals of multiple channels can be easily performed under 1~racking control, so it is possible to record video signals in the -calendar band. In order to obtain a high-resolution reproduced image by performing reproduction, for example, three simultaneous signals corresponding to each of the three primary colors of additive color mixture may be recorded on a recording medium and reproduced, or This has the advantage of being able to easily configure a recording/playback device that records and plays back broadband video signals as simultaneous signals of multiple channels. A plurality of recording traces are simultaneously formed by a plurality of magnetic heads in one of the flat magnetic recording/reproducing areas formed between the sequential recording traces formed by the 1-ranking reference signal being formed. However, there are various issues that have arisen with this technology, such as crosstalk between multiple magnetic heads, and the difficulty of manufacturing a recording/reproducing element with a structure in which multiple magnetic heads are arranged in a predetermined manner in a minute area. In the present invention, the problems such as difficulty can be satisfactorily solved because a plurality of magnetic heads are arranged at separate positions.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of an information signal recording and reproducing method using a magnetic recording medium disc in which tracking control information is obtained by detecting changes in capacitance according to the present invention, and FIG. Figures 3 to 9 are diagrams for explaining how recording traces are formed by the racking reference signal to 1 on a magnetic recording medium disk, in which racking control information is obtained by detecting a change in . FIG. 3 is a diagram for explaining the correspondence between recording/reproducing elements and recording traces on a disc.

Claims (1)

[Claims] 1. Tracking control information is obtained by detecting changes in capacitance.Sequential recording traces based on tracking reference signals formed by changes in geometric shape in a magnetic recording medium disk. The interval is Tp, the electrode width of the electrode provided for detecting the above-mentioned tracking reference signal as a change in capacitance value is Ew, and When the width of the flat magnetic recording/reproducing area formed between successive recording traces by the tracking reference signal is Tm, Tm≦Ew≦T between Tp, Ew, and Tm described above.
N flat magnetic recording/reproducing areas each having a width of Tm to be formed between an electrode having an electrode width having a relationship of p and sequential recording traces by the tracking reference signal (N is a natural number of 2 or more), one magnetic head is arranged for each one of the magnetic heads so as to form recording traces with the centers of the recording traces located at different positions. a recording/reproducing element comprising: a recording/reproducing element; means for controlling tracking of the recording/reproducing element based on a tracking reference signal detected as a change in capacitance by an electrode in the recording/reproducing element; A method for recording and reproducing information signals using a magnetic recording medium disc in which tracking control information is obtained by detecting changes in capacitance values, comprising means for recording or reproducing individual information signals using magnetic heads; Let Tp be the recording trace interval of successive recording traces formed by a tracking reference signal formed by a change in the geometric shape of a magnetic recording medium disk from which tracking control information is obtained by detecting a change in capacitance value, and Let Ew be the electrode width of the electrode provided to detect the tracking reference signal as a change in capacitance value, and further, let Ew be the electrode width of the electrode provided to detect the tracking reference signal as a change in capacitance value. When the width of the flat magnetic recording/reproducing area formed between the recording traces is Tm, Tm≦Ew≦T between Tp, Ew, and Tm described above.
N flat magnetic recording/reproducing areas each having a width of Tm to be formed between an electrode having an electrode width having a relationship of p and sequential recording traces by the tracking reference signal (N is a natural number of 2 or more), one magnetic head is arranged for each one of the magnetic heads so as to form recording traces with the centers of the recording traces located at different positions. A recording/reproducing element for an information signal recording/reproducing method using a magnetic recording medium disk in which tracking control information is obtained by detecting changes in capacitance values.