Patent ID: 6400521
Filing Date: 2002-06-04
Classification: G11B

Abstract:
Process for the recording of digital signals on a magnetic tape in multiple longitudinal tracks by means of recording heads which are arranged in a matrix and are supplied with current row-wise and column-wise in dependence on the digital signals in a multiplex operation wherein the magnetic field resulting exclusively from row or column currents in the recording heads supplied with current in each case lies below the coercive field strength of the magnetic tape, while the magnetic field resulting from row and column currents superposed in the same sense in the respectively selected recording heads supplied with current lies above the coercive field strength of the magnetic tape and produces magnetized domains, wherein for each recording head a value determined in preliminary tests for the magnetizing current from row and column currents superposed in the same sense, for maintaining a desired operating point, is permanently stored in a non-volatile memory separate from the magnetic tape and, on selection, the recording heads are supplied with the stored values of the magnetizing current assigned to them.