SU985823A1 - Magnetoresistive head - Google Patents

Description

, (54) MAGNETIC RESISTANT HEAD

one

The invention relates to a technique of magnetic recording, in particular to magnetic heads.

A magnetic head is known, comprising two magnetoresistive elements, bias elements and a decoding unit. In a well-known head, efficient compensation of linear & jjf distortion & ja is effective.

A disadvantage of the known head is its layer due to the elements of magnetization and decoding T;

The closest in technical supersity and effect achieved to the proposed is a simpler magnetic head containing a substrate, a dielectric layer applied on a back, a magnetic core placed on a dielectric layer and reproducible with a working and auxiliary gaps placed in the secondary gap, bias conductor.

placed on one of the sides of a 5 magnitude magnetoresistive element, and a reproduction amplifier, to which an reproductive magnetism resistive element G2 is connected to the input through which the resistor is connected.

The disadvantage of the head data is the non-linear nature of the dependence of the output signal on the magnetic flux of the carrier, which is caused by the non-linear dependence of the resistance of the magstorg resistive element.

The purpose of the present invention is to reduce the non-linear distortion of the output signal of the head.

Claims (2)

This goal is achieved by the fact that the magnetic head is equipped with an additional resistor and a magnetoresistive element, while in the core there is a separate solder gap in which an additional magnetoresistive element connected to the inverter input of the amplifier through an additional resistor is placed. FIG. 1 shows the structure of the proposed magnetoresistive head &ki; in fig. 2 - the head is functional. The magnetic head contains the underbar 1, the dielectric layer 2, the magnetic core 3 placed on the dielectric layer 2, the magnetoresistive element 4, embedded in the auxiliary curl of the magnetic core 3, the bias conductor 5 placed under the main magnetoresistive element 4, the lining 6 placed in the working the gap of the magnetic core 3, the additional magnetoresistive element 7, the main and auxiliary resistors 8 and 9, and the amplifier Vo production. The common point of resistors 8 and 9 is connected to source 11, for example. The magnetic head works as follows. The magnetic flux of the carrier 12 is closed through the magnetic core 3 and the magnetoresistive elements 4 and 7. During the flow of the detection current from the source 11 through the magnetic resistance elements 4 and 7, the resistance of the magnetic resistive elements 4 and 7 varies in accordance with the magnetic flux of the carrier 12. Output linearization the signal from the magnitude of the magnetic flux current flowing in conductor 5 is set to n less displacement of the magnetoresistive element 4. Additional compensation of nonlinear distortion is achieved by subtracting si The magnetoresistive elements 4 and 7 are fed to the direct and inverse outputs of the amplifier 10, while the detection current density in the additional compensating magnetic resistive element 7 is set to half that of the magnetic resistive element 4. The current is provided the choice of the magnitude of the resistance (Eesistor §. The installation of the currents is surrounded by the choice of the magnitude of the resistance of the resistor 8. Testing of the magnetic head showed that the magnitude of the nonlinear distortion does not exceed 2% in the range from 60 to 160OO Hz limits of the entire working range of the input signal. A magnetoresistive head comprising a substrate, a dielectric layer deposited on a substrate, a magnetic core disposed on a dielectric layer and formed with a working and auxiliary gap, reproducing a magnetoresistive element disposed in an auxiliary gap, a displacement conductor disposed on one side of a repetitive magnet resistor. element, and a reproduction amplifier, to the input of which a reproducing magnetoresistive element is connected through a resistor, in that, to reduce the nonlinear distortion of the head output signal it is provided with additional resistors and magnntorezistivnym element, wherein the core vsholnen additional gap in which is placed an additional magnetoresistive el & ment, connected to the inverting input of the amplifier via a further resistor. Sources of information taken into account in the examination 1. For Britain, No. 2023325, cl. Q 5 P, publ. 1979 2. Patent. USA, No., 4100583, class 360-113, compressed & shk. 1978 (prototype).