Magnetic data storage system

摘要

A magnetic data storage system includes a storage medium wherein bits of data are stored by perpendicular recording with a density sufficiently high to provide for the simultaneous presence of more than one data bit beneath the magnetic sensing element of a read head. A relative motion is imparted between the head and the medium during playback of data, and the sensed magnetic field changes produce sensor signals. The sensor signals are delayed by one or more delay elements providing delay times which differ from each other by one increment of delay, such delay increment being equal to the amount of time elapsed by a stored data bit passing a point on the pole piece of the read head. By summing together the respective delayed signals, cancellation of the spurious response is obtained so that the stored data can be retrieved.