Patent ID: 6185061
Filing Date: 2001-02-06
Classification: G11B

Abstract:
A semiconductor integrated circuit device that is used in a magnetic disk drive to write data to, read data from, and erase data from a magnetic disk used as a data storage medium by means of a head, comprising:data reproduction means for reproducing data from a signal read by the head from the magnetic disk;data output means for outputting reproduced data obtained as an output of the data reproduction means to an external circuit;write/erase means for controlling a current supplied to the head when data is written to or erased from the magnetic disk; andcontrol means for controlling operation of the data reproduction means, the data output means, and the write/erase means,wherein, during an erase operation, the control means outputs a control signal which keeps the data reproduction means deactivated, and, during transition from an erase operation to a read operation, the control means first turns off an erase current, and then, a first predetermined length of time thereafter, outputs a control signal which activates the data reproduction means, and then, a second predetermined length of time thereafter, outputs a control signal which activates the data output means.