Magnetic sensor having spaced magneto-resistance elements

Details Magnetic sensor having spaced magneto-resistance elements Magnetic sensor having spaced magneto-resistance elements

1992-01-09

1993-03-30

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

360113, 338 32R, G01B 714, G11B 537

Patent

active

051987627

ABSTRACT:
A magnetic sensor has first, second, third and fourth magneto-resistance effect elements disposed in a direction of a magnetizing pitch (1) of a magnetic recording medium serving to supply a magnetic signal, with first and second magneto-resistance effect elements disposed spacedly from each other at an interval corresponding to an electrical angle of .theta., the third and fourth magneto-resistance effect elements disposed spacedly from each other at an interval corresponding to an electrical angle of (360.degree.-.theta.), and the intervals between the center line of the first and second magneto-resistance effect elements and between the line of the third and fourth magneto-resistance effect elements being set to n.lambda.. The four magneto-resistance effect elements are connected to one another in series in the order of the first, second, fourth and third magneto-resistance effect elements with both ends of the serially-connected magneto-resistance effect elements being provided with a power source terminal, and an output terminal being provided at a conjunctive point of the second and fourth magneto-resistance effect elements. .theta. is set to a range of 30.degree..ltoreq..theta..ltoreq.90.degree., based on .lambda.=360 to thereby enable an output wave form of the magnetic sensor to have a large or sharp gradient in the vicinity of a comparing level.

REFERENCES:
patent: 4731580 (1988-03-01), Indo
patent: 4818939 (1989-04-01), Takahashi et al.
patent: 5036276 (1991-07-01), Aizawa
patent: 5047716 (1991-09-01), Katagiri

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