| 摘要 |
The present application provides a magnetic head device capable of suppressing output fluctuation even if the output has changed in part of an output waveform from a magnetic head. More specifically, a magnetic head device is characterized by comprising a magnetic head (1) for reproducing information recorded on a magnetic information recording medium, an amplification unit (2) for amplifying a reproduced signal reproduced by the magnetic head (1) by gain, an A/D conversion unit (3) for sampling the amplified reproduced signal with a predetermined period, converting the amplified reproduced signal into a digital signal, and outputting the digital signal, a signal comparison unit (4a) for comparing the output value of the digital signal with a preset output reference value, and a gain control unit (4b) for adjusting the gain such that the output value approaches the output reference value when the output value is larger than or smaller than the output reference value. |
