Patent ID: 6118610
Filing Date: 2000-09-12
Classification: G11B

Abstract:
A servo information reproducing method for reproducing servo information from a recording medium by a head, where servo regions recorded with the servo information and data regions recorded with data coexist on the recording medium, said servo information reproducing method comprising:a setting step setting a sense current which is supplied to the head when reproducing the servo information from the servo region to a value larger than that of a sense current which is supplied to the head when reproducing the data from the data region,said setting step variably setting the value of the sense current depending on a level of the servo information which is reproduced from the servo region so that the sense current is updated to a first value Iss1 if the level of the reproduced servo information is less than or equal to a first threshold level Th1, and is updated to a second value Iss2 if the level of the reproduced servo information is less than or equal to a second threshold level Th2, said first and second values Iss1 and Iss2 respectively being larger than a value of the sense current which is supplied to the head when reproducing data from the data region and satisfy a relationship Iss1<Iss2, and the first and second threshold levels Th1 and Th2 satisfy the relationship Th1>Th2.