| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce an area or to save on power of a write system circuit by easily adjusting an overshoot of a write current pulse. <P>SOLUTION: Between an output driver 10a provided with an impedance Z<SB>S</SB>and a magnetic recording head 12a, two or more kinds of transmission lines 11a, 11b and 11c having respectively different characteristic impedances are provided. The respective transmission lines 11a, 11b and 11c are formed so that their respective impedances Z<SB>1</SB>, Z<SB>n-1</SB>, Z<SB>n</SB>(n≥2) on the magnetic recording head side 12a are larger than those on the output driver 10a side (Z<SB>1</SB>>Z<SB>n-1</SB>>Z<SB>n</SB>), and the impedance Z<SB>S</SB>of the output driver 10a is set to the characteristic impedance Z<SB>1</SB>of the transmission line 11a or larger. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
