JPS63807A - Magnetic head - Google Patents

Abstract

PURPOSE:To suppress deterioration in the S/N of a signal even when a few amount of off-track of a head is generated at time of reproduction, by arranging a read/write gap vertical to a tracking signal gap. CONSTITUTION:So that a read/write gap 108 is set as vertical to tracking signal gaps 109 and 110, no readout of the signal from each other is generated by loss of azimuth. At time of recording, write is performed by driving a recording signal on a coil 107, and a tracking servo signal on coils 105 and 106. At time of the reproduction, a head progresses applying a tracking servo on a written signal. In this way, it is possible to suppress the deterioration in the S/N of the signal, even when a few amout of off-track is generated at the time of reproducing the head.

Description

[Detailed Description of the Invention] [Industrial Application Field] For recording tracking signals on both sides of an information signal,
The present invention relates to a magnetic head having one read/write gap and two tracking signal gaps.

[Conventional technology]

An example of a conventional magnetic head for recording and reproducing tracking signals is shown in FIG. 2. FIG. 2 is a view of a magnetic head for tracking servo, viewed from the sliding surface. The read/write gap is 107. The gamma that records and reproduces the tracking servo signal is 105.106.
It is. Both are arranged perpendicularly to the direction in which the head travels with respect to the recording medium.

[Problem that the invention seeks to solve]

A magnetic recording/reproducing device that uses a magnetic head with the structure shown in Figure 2 poses a problem if the head deviates from a predetermined position on the recording medium. Although this is not the case, it is possible that there may be some deviation due to effects such as hysteresis.

In this case, the read/write gap widens the tracking signal and lowers the S/N of the signal.

The purpose of the filter head of the present invention is to avoid this deterioration of the signal 5/N.

[Means for solving problems]

In the magnetic head of the present invention, the read/write gap is arranged perpendicular to the direction in which the head travels with respect to the recording medium, and the tracking signal gaps on both sides record parallel to the direction of travel.

[For production]

If the read/write gap and the tracking signal gap are arranged vertically, the azimuth loss will be maximum and no signals will be read from each other.

〔Example〕

Embodiments of the magnetic head of the present invention will be described with reference to the drawings.

Figure 11. il is an external view of the magnetic head of the present invention.

- It can be seen that the read/write gap and erase gap are arranged vertically.

101 is a core forming a tracking signal gap;
The same applies to 102. Both cores 103 and 104 form a read/write gap. +05.106 is a coil for recording and reproducing tracking signals, and 107 is a coil for recording and reproducing signals.

FIG. 1 (bl is a view of the magnetic head of the present invention viewed from the sliding surface. 108 is a read/write gap, 109.110
is the tracking signal recording/playback gap. In this way, since the read/write gap and the erase gap are vertical, there is no possibility of reading each other's signals by setting the azimuth.

During recording, the recording signal is excited in the coil 107, the tracking servo signal is excited in the coils 105 and 106, and written on the recording medium. The signal pattern written on the recording medium is
In the figure, 301 is a signal pattern written in the read/write gap.

302 is a signal pattern recorded in the tracking signal gap. 303 is a guard band.

During reproduction, the head advances while applying tracking servo on the written signal as shown in FIG.

〔Effect of the invention〕

In the magnetic head of the present invention, even if there is some off-track during reproduction, the S/N ratio of the signal does not deteriorate.

[Brief explanation of drawings]

FIG. 1 fat is an external view of the magnetic head of the present invention. Figure 1 (bl is a diagram of the magnetic head of the present invention viewed from the dynamic surface. Figure 2 is a diagram of the conventional magnetic head viewed from the sliding surface. Figure 3 is a diagram of the En pattern recorded by the magnetic head of the present invention. Applicant: Seiko Epson Corporation Figure 1 (b)

Claims (1)

[Claims] for recording tracking signals on both sides of the information signal,
In a magnetic head having one read/write gap and two tracking signal gaps, the read/write gap is arranged perpendicular to the direction in which the head travels with respect to the recording medium, and the tracking signal gaps on both sides are arranged as follows.
A magnetic head that records information parallel to the direction of travel.