The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 2008
Filed:
Jan. 31, 2006
Fumio Yuuki, Fujimino, JP;
Hiroki Yamashita, Hachioji, JP;
Masayoshi Yagyu, Hanno, JP;
Tatsuya Kawashimo, Kokubunji, JP;
Fumio Yuuki, Fujimino, JP;
Hiroki Yamashita, Hachioji, JP;
Masayoshi Yagyu, Hanno, JP;
Tatsuya Kawashimo, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magnetic recording device capable of reducing the size of a writing circuit and the power consumption by readily adjusting the overshoot of the write current pulses is provided. Two or more transmission lines having different characteristic impedances are provided between an output driver having an impedance Zand a magnetic head, the transmission lines are formed so that the characteristic impedances Z, Z, and Z(n≧2) thereof on the output driver side are higher than those on the magnetic recording head side (Z>Z>Z), and the impedance Zof the output driver is equal to or higher than the characteristic impedance Zof the transmission line.