Magnetic head including recording device and servo device, and magnetic recording apparatus and magnetic recording/reproducing apparatus including the magnetic head

A magnetic recording apparatus comprising:

• a magnetic head, comprising a recording device and a servo device disposed in parallel with the recording device in a direction in which the magnetic head moves over the magnetic recording medium, for recording signals to form adjacent signal tracks on a magnetic recording medium at different azimuth angles and for recording signals to form alternately-adjacent signal tracks on the magnetic recording medium at the same azimuth angle;
• servo amplifying means for processing and outputting a signal read from the servo device that has moved over a signal track in a certain recording operation, and for processing and outputting a signal read from the servo device in a currently carried out recording operation on the magnetic recording medium;
• and
• servo executing means comprising a comparator circuit and a recording device movement position correcting means, the comparator circuit comparing levels of the outputs,
• wherein, while the recording device is recording a signal to form a signal track on the magnetic recording medium at a certain azimuth angle, the servo device moves over a signal track that has already been formed at the same azimuth angle as the certain azimuth angle by recording a signal.

A magnetic recording/reproducing apparatus comprising:

• a magnetic head, comprising a recording device and a servo device disposed in parallel with the recording device in a direction in which the magnetic head moves over the magnetic recording medium, for recording signals to form adjacent signal tracks on a magnetic recording medium at different azimuth angles and for recording signals to form alternately-adjacent signal tracks on the magnetic recording medium at the same azimuth angle;
• servo amplifying means for processing and outputting a signal read from the servo device that has moved over a signal track in a certain recording operation, and for processing and outputting a signal read from the servo device in a currently carried out recording operation on the magnetic recording medium;
• and
• servo executing means comprising a comparator circuit and a recording device movement position correcting means, the comparator circuit comparing levels of the outputs,
• wherein, while the recording device is recording a signal to form a signal track on the magnetic recording medium at a certain azimuth angle, the servo device moves over a signal track that has already been formed at the same azimuth angle as the certain azimuth angle by recording a signal, and
• wherein, in a reproducing operation, a signal read from the reproducing device is sent to the servo amplifying means and is output as a reproduction signal from the servo amplifying means, so that the servo amplifying means is used, not only as a servo circuit, but also as a reproduction circuit.