Pulse coder using magnetoresistance elements having an improved

Details Pulse coder using magnetoresistance elements having an improved Pulse coder using magnetoresistance elements having an improved

1982-12-09

1985-11-05

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

324174, 34087032, G01B 714, G01P 342, G08C 2100

Patent

active

045516766

ABSTRACT:
A pulse coder comprises a rotating member (1) on which first and second magnetic patterns (221, 222; 221', 222') are formed and a fixed member (3) on which first and second magnetoresistance patterns (MR5, MR6) are formed. When the first and second magnetic patterns of the rotating member directly face the first and second magnetoresistance patterns, respectively, of the fixed member, the first and second magnetoresistance patterns have a minimum resistance value and a maximum resistance value, respectively. The first and second magnetic patterns are constructed by alternately and irregularly arranging strong magnetic field generating areas and weak magnetic field generating areas.

REFERENCES:
patent: 3185920 (1965-05-01), Brunner
patent: 3993946 (1976-11-01), Makino
patent: 4274053 (1981-06-01), Ito et al.
patent: 4305072 (1981-12-01), Makita
patent: 4319188 (1982-03-01), Ito et al.

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