G - Physics – 11 – B
Patent
G - Physics
11
B
G11B 5/455 (2006.01) G11B 5/41 (2006.01)
Patent
CA 2247857
A magnetic recording and reproducing apparatus has a recording magnetic head and a reproducing magnetic head disposed on a rotary cylinder, and a magnetic head clogging detecting unit for detecting clogging of the recording magnetic head by monitoring the output of the reproducing magnetic head. In this magnetic recording and reproducing apparatus, for saving power consumption, magnetic head clogging is detected intermittently only in predetermined periods, and in other periods the operation of the head clogging detecting unit is stopped. As a method of stopping the operation of the magnetic head clogging detecting unit, the power supply of the magnetic head clogging detecting unit is turned off. The width and interval of detection periods and detection sensitivity of magnetic head clogging detection can be freely set by the user. Further, in the case of magnetic recording .and reproducing apparatus having plural sets of recording magnetic heads and reproducing magnetic heads disposed on the rotary cylinder for drawing plural track patterns on a magnetic recording tape, by changing over the outputs of the reproducing magnetic heads, and putting the outputs into the common magnetic head clogging detecting unit, in addition to the above method, the power consumption necessary for magnetic head clogging detection can be further saved.
Kase Tsutomu
Kataoka Kazuhiro
Fetherstonhaugh & Co.
Matsushita Electric Industrial Co. Ltd.
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