Magnetism detector

Abstract

Abstract PURPOSE:To improve the output and temperature stability by interposing an element having a low conductivity between two magnetic resistance elements. CONSTITUTION:A magnetic head for reproducing the digital information which is recorded vertically in a recording medium 1 is composed of two magnetic resistance elements 9a and 9b having the same shape and an element 10 having a low conductivity and interposed inbetween such that the elements 9a and 9b are connected with a differential amplifier 12. Thus, if an electric current is supplied in a Z direction (or in an easily magnetizable direction) by constant current sources 11a and 11b, the output waveforms by the element 9a take a shape, which is slightly retarded from that by the element 9a, so that the differential output is taken out of the differential amplifier 12. As a result, the peak of the output and the peak value become twice those for the case using only one magnetic resistance element, and the influence from the surrounding magnetic field is substantially eliminated so that the output change due to the temperature change can be remarkably improved.

Inventors

• 👤 Kuniaki Miura

Bibliographic Details