RU2012008C1 - Data read-out transducer - Google Patents

Abstract

FIELD: data-processing and measuring technology. SUBSTANCE: data read-out transducer has semiconductor strip 1 provided with layer of opposite polarity of conductivity formed on its surface that carries current and Hall electrodes, permanent magnets embracing strip surface and building up permanent magnetic field perpendicular to chip surface carrying contacts. EFFECT: enlarged functional capabilities. 3 dwg

Description

 The invention relates to information-measuring equipment and can be used in devices for reading and processing optical and magnetic signals.

 The aim of the invention is to increase the amount of read information.

 In FIG. 1 schematically shows a sensor for reading information; in FIG. 2 - curves of the dependence of the Hall EMF on the current value at two values of the magnetic field induction; in FIG. 3 is a timing chart of the inventive sensor.

 The device consists of a semiconductor wafer 1 placed between two permanent magnets 2 (the magnets are made of a samarium-cobalt alloy in the form of two parallelepipeds). The magnetic field is directed perpendicular to the surface on which the contacts are applied. Optical information (modulated radiation from an incandescent lamp) was supplied to the transparent Hall contacts through the optical fiber 3. The design of the inventive sensor may be different. For example, magnets of any shape that create a constant magnetic field with or without concentrators can be used; Optical information can come either through optical fibers or through holes in magnets (concentrators) or be focused on the crystal surface using lenses.

 In FIG. 2 shows the dependence of the Hall EMF on the supply current during the induction of a magnetic field of 0.34 T (the magnetic field is created by permanent magnets and signals through the magnetic information channel) - curve a); and 0.1 T - curve b) (at zero signals of the magnetic information channel). The “+” sign corresponds to the arrival of the optical signal, the “-” sign to its absence. The presence of permanent magnets 2 makes it possible to register optical signals even with zero magnetic signals, since in this case the Hall EMF, i.e., the sensor output signal, is not equal to zero.

In FIG. Figure 3 shows the timing diagrams of changes in the supply current (Fig. 3a), magnetic signals (Fig. 3b), optical signals (Fig. 3c), and output signals (Fig. 3d). In the absence of information on the magnetic channel B _signal = 0, the value of U _n - the output characteristic of the sensor is determined by the information on the optical channel. At a supply current I _{A, the} output characteristic of the sensor also contains information about the signals transmitted through the optical channel.

Claims (1)

 SENSOR FOR READING INFORMATION, containing a semiconductor wafer, on the surface of which a layer with the opposite type of conductivity is formed, with current and Hall electrodes deposited on it, while the Hall electrodes are made of a material transparent to light radiation, characterized in that, in order to increase the volume of the information being read, permanent magnets are introduced into it, and the magnetic field of the permanent magnets is perpendicular to the surface of the plate on which the contacts are applied.

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