| 摘要 |
A magnetoresistant transduction device for reading coded data comprises a plurality of magnetoresistances (MRI1 to MRI5), which are placed in alignment and spaced from a magnetization device (DAI) by means of a grid (GMI) of non-remanent magnetic material, having parallel elements (EFI1 to EFI5) situated between the magnetization device and the magnetoresistances and to which the magnetoresistances are secured either directly or by means of a substrate. The parallel elements serve to focus the magnetic field generated by the magnetization device, which may be in the form of a permanent magnet, such that a plurality of n mutually independent magnetic fields is formed, each field being associated with a corresponding magnetoresistance. The transduction device is applicable to the reading of coded data of very low density, utilized more particularly in franking machines.
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