Magnetoresistive detector with multiple bias magnets for biasing its magnetoresistive elements
First Claim
1. A magnetoresistive detector comprising a printed circuit board, magnetoresistive elements, bias magnets, a magnet for changing a magnetic field, detection circuits for wave-shaping signals detected by the magnetoresistive elements, whereinsaid bias magnets have approximately the same dimensions as the magnetoresistive elements and are fixed so as to overlap the magnetoresistive elements, and on the printed circuit board, holes, having approximately the same dimensions of the magnetoresistive elements, for positioning and fixing the magnetoresistive elements are disposed.
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Abstract
The magnetoresistive detector of the present invention uses magnetoresistive elements for detecting changes in the magnetic field of a moving magnet 3 which changes a magnetic field, wherein bias magnets (21, 22, 23, 24) can be mounted without using positioning jigs, errors in mounting are prevented, and the mounting density of components on a printed circuit board (4) is improved, whereby improved quality and compactness of the magnetoresistive detector can be achieved. For that purpose, the shape and dimensions of magnetoresistive detector elements (11, 12, 13, 14) are made identical to the shape and dimensions of the bias magnets (21, 22, 23, 24), and on the printed circuit board (4), positioning sections (41) for simultaneously positioning the magnetoresistive detector elements (11, 12, 13, 14) and bias magnets (21, 22, 23, 24) are provided.
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2 Claims
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1. A magnetoresistive detector comprising a printed circuit board, magnetoresistive elements, bias magnets, a magnet for changing a magnetic field, detection circuits for wave-shaping signals detected by the magnetoresistive elements, wherein
said bias magnets have approximately the same dimensions as the magnetoresistive elements and are fixed so as to overlap the magnetoresistive elements, and on the printed circuit board, holes, having approximately the same dimensions of the magnetoresistive elements, for positioning and fixing the magnetoresistive elements are disposed.
Specification