| 摘要 |
<p>A disk-like magnetic storage medium (hard disk plate) is given a circuit ground potential. One end of an MR (magnetoresistance effect) head is given the above circuit ground potential to output a read signal from the other end. The other end of the MR head is supplied with a predetermined bias current or bias voltage. An AC signal that has passed through a capacitor at the other end of the MR head and a DC bias voltage that has passed through a resistive element having a large enough impedance relative to the capacitor are applied to the gate of an amplifier MOSFET. A load circuit is provided to the drain of the amplifier MOSFET to produce an output signal from the drain.</p> |
