Device for controlling the position of a magnetic head with respect to an information track to be followed

摘要

A device for the automatic control of the position of the playback head with respect to an information track recorded on a magnetic recording medium cooperating with the playback head. For generating a signal for controlling the position of the head, the device comprises an elongate element of magnetoresistance material having two final taps and one center tap. The difference of the voltages across each final tap and the center tap is indicative of the position of the head.