U.S. Philips Corporation

Jan Antoon Potgiesser

Frederik W Gorter

Karel E Kuijk

A magnetic reading head having a magneto-resistive element of the non-magnetically biased type, in which the current is forced to flow through the element at an angle with the easy axis of magnetization. For adjusting the dynamic range of the element, the element is subjected to a variable strength auxiliary field having a direction of which is parallel to the easy axis of magnetization.

Variable dynamic range magneto-resistive head

A magnetic head utilizing the magneto-resistive effect with at least two magneto-resistive elements present in one plane at right angles to the recording medium. The elements are connected to an output circuit in which their signals are subtracted from each other. In this manner compensation is provided for both interference signals and crosstalk signals. The head may comprise a reading element and a compensation element arranged above it or a reading element flanked by two compensation elements with a larger distance to the recording medium or with a smaller height.

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Eindhoven, Netherlands

Jan Antoon Potgiesser