Patent Number: 6,297,631

Title: Magnetic signal reproducing method and apparatus using magneto-resistive effect element with increased sense current

Abstract: A magnetic signal reproducing apparatus which can lessen fluctuation of reproduced outputs in reproducing magnetic signals recorded in a magnetic tape by a magneto-resistance effect type magnetic head even if a magnetic tape sliding face of the magneto-resistance effect type magnetic head is abraded. A current value of a sense current when a voltage fluctuation level of the sense current caused when a magnetic field in the normal direction is applied to a magneto-resistance effect element of the magneto-resistance effect type magnetic head is equal with a voltage fluctuation level of the sense current caused when a magnetic field in the opposite direction is applied thereto is set to a predetermined value I0. Then, the current value of the sense current supplied to the magneto-resistance effect element of the magneto-resistance effect type magnetic head is set to be greater than I0 in reproducing the magnetic signals recorded in the magnetic tape.

Inventors: Ozue; Tadashi (Kanagawa, JP), Shirai; Toshio (Kanagawa, JP), Kamatani; Yoshiteru (Kanagawa, JP), Ikegami; Tomohiro (Kanagawa, JP), Saito; Takehiko (Kanagawa, JP)

Assignee: Sony Corporation

International Classification: G11B 5/035 (20060101); G11B 5/008 (20060101); G11B 5/02 (20060101); G11B 5/00 (20060101); G11B 005/39 (); G11B 005/255 (); G01R 033/09 (); G01R 035/00 ()

Expiration Date: 10/02/2018