System for eliminating noise arising from difference in polarity of magnetization by tunnel erase heads

An apparatus having read/write head means for writing and reading data on a magnetic record medium by creating record tracks thereon, and erase head means so arranged with respect to the read/write head so to erase a pair of opposite marginal edge portions of each data track being created by the read/write head means, with the consequent creation of spaces intervening between the record tracks on the record medium, wherein the improvement resides in a system for the reduction of noise arising from an abrupt change from one polarity of magnetization to another in the spaces between the record tracks, the noise reduction system comprising:

• (a) erase current supply means for supplying an erase current to the erase head means;
• and
• (b) a transition sloping circuit connected between the erase head means and the erase current supply means for controlling the flow of the erase current through the erase head means, the transition sloping circuit having means for sloping at least either of a rise and fall of the erase current flowing through the erase head means.