Method and apparatus for setting recording current in perpendicu

Details Method and apparatus for setting recording current in perpendicu Method and apparatus for setting recording current in perpendicu

1985-04-11

1988-01-12

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Recording or reproducing plural information signals on the...

Frequency multiplex

360 24, 360 25, 360 66, 358315, 358330, H04N 979, H04N 983, G11B 503

Patent

active

047195207

ABSTRACT:
A method for superimposed recording of a first signal and a second signal with frequency which is less than the frequency for the first signal, in a perpendicular magnetic recording medium by means of a ring-shaped magnetic head. The mutually superimposed first and second signals are supplied to the magnetic head. The value of the first signal current to be supplied to the magnetic head is set at a value which is greater than the current value for which the reproduced output level of the first signal that was recorded on the magnetic recording medium attains a maximum, and a satisfactory superimposed recording characteristic can be obtained by such an arrangement.

REFERENCES:
patent: 2419195 (1944-06-01), Begun
patent: 4353100 (1982-10-01), Inoue
patent: 4379311 (1983-04-01), Ohkawara
patent: 4380779 (1983-04-01), Kitamura et al.
patent: 4422109 (1983-12-01), Sampei et al.
patent: 4447467 (1984-05-01), Oguchi et al.

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