| 摘要 |
PROBLEM TO BE SOLVED: To provide a reproducing circuit of a composite head suitable for the high density recording without thermal asperity noise, while obtaining the large reproduction output by synthesizing the signal subjected to signal process to the output signal of an MR(magneto-resistance effect) head and the output signal of an inductive head. SOLUTION: The output of a coil 2b constituting the inductive head is supplied to a synthesizing circuit 6 through an inductive head preamplifier 3. The output of an MR element 2c constituting the MR head is supplied to a differential/phase correcting circuit 5 through an MR head preamplifier 4. By the differential/phase correcting circuit 5, the signal processes for the differential, polarity inversion and phase adjustment are carried out to the output signal of the MR head, then a signal equivalent to the output of the inductive head (the signal proportional to the inverse polarity of the differential of the magnetic flux amount of the signal) is outputted. By the synthesizing circuit 6, the output signal of the MR head corrected by the differential/phase correcting circuit 5 and the output signal of the inductive head are added and synthesized.
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