Patent ID: 6404578
Filing Date: 2002-06-11
Classification: G11B,H03F,H03H

Abstract:
A magnetic information storage apparatus, comprising:a write channel for writing information to a magnetic medium; and a read channel for reading information from the magnetic medium, said read channel including a sensor for generating an information signal in response to information stored on the magnetic medium; an output; and a signal path coupled between the sensor and the output which amplifies the information signal from the sensor and provides the amplified information signal to the output, when transitioning from a write mode in which the write channel is active to a read mode in which the read channel is active, the transition inducing a write-to-read disturbance in read channel, and the signal path including a filter having a zero which varies from a first frequency to a second, lower frequency in a time-dependent manner related to a time duration of the write-to-read disturbance.