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US5036319A
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Magnetic encoder using magnetoresistive element
Assignee: Shicoh Engineering Co Ltd
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Filing: 1990-12-26
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Granted: 1991-07-30
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Expires: 2010-12-26
Abstract
Abstract An magnetic encoder includes a multipolar magnetic body having a row of alternate North and South poles of equal widths, and a magnetoresistive element diposed in confrontation to the multipolar magnetic body. The magnetoresistive element includes at least one A phase magnetoresistive element member and at least one B phase magnetoresisitve element disposed in juxtaposition over ##EQU1## where n is an integer greater than or equal to 1, and λ is a width of each individual pole of the multiplar magnetic body. Each of the A phase magnetoresistive element members and the B phase magnetoresistive element member has a group of series connected linear conductors arranged side-by-side into a comb-like shape. The A phase magnetoresistive element member extends over ##EQU2## and the B phase magnetoresistive element member is out of phase with the A phase magnetoresistive element member by ##EQU3##
Inventors
- 👤 Manabu Shiraki
- 👤 Osami Miyao
- 👤 Shoji Fujisawa
- 👤 Shunji Kawashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:44
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/142; G01D5/145; G01D5/244; G01D5/245; G01D5/2451; H; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/24; H03M1/28; H03M1/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
141 words
A magnetic encoder comprising: (a) a multipolar magnetic body having a row of alternate North and South poles of equal widths; and (b) a magnetoresistive element disposed in confrontation to said multipolar magnetic body, said magnetoresistive element including at least one A phase magnetoresistive element member and at least one B phase magnetoresistive element disposed in juxtaposition over ##EQU9## where n is an integer greater than or equal to 0, and λ is a width of each individual pole of said multipolar magnetic body, each of said A phase magnetoresistive element members and said B phase magnetoresistive element member having a group of series connected linear conductors arranged side-by-side into a comb-like shape, said A phase magnetoresistive element member extending over ##EQU10## said B phase magnetoresistive element member being out of phase with said A phase magnetoresistive element member by ##EQU11##
Claim 2
Dependent Claim
141 words
A magnetic encoder comprising: (a) a multipolar magnetic body having a row of alternate North and South poles of equal widths; and (b) a magnetoresistive element disposed in confrontation to said multipolar magnetic body, said magnetoresistive element including at least one A phase magnetoresistive element member and at least one B phase magnetoresistive element disposed in juxtaposition over ##EQU9## where n is an integer greater than or equal to 0, and λ is a width of each individual pole of said multipolar magnetic body, each of said A phase magnetoresistive element members and said B phase magnetoresistive element member having a group of series connected linear conductors arranged side-by-side into a comb-like shape, said A phase magnetoresistive element member extending over ##EQU10## said B phase magnetoresistive element member being out of phase with said A phase magnetoresistive element member by ##EQU11##
Claim 3
Dependent Claim
206 words
A magnetic encoder according to claim 1, the number of said A phase magnetoresistive element members being two and said two A phase magnetoresistive element members being spaced by a distance equal to ##EQU12## the number of said B phase magnetoresistive element members being two and said two B phase magnetoresistive element members being spaced by a distance equal to ##EQU13## one of the two A phase magnetoresistive element members constituting an a phase magnetoresistive element member, the other of the two A phase magnetoresistive element members constituting an a' phase magnetoresistive element member and being connected in series with said a phase magnetoresistive element member, one of the two B phase magnetoresistive element members constituting a b phase magnetoresistive element member, the other of the two B phase magnetoresistive element members constituting a b' phase magnetoresistive element member and being connected in series with said b phase magnetoresistive element member, further including a first output terminal connected to a connecting point between said a and a' phase magnetoresistive element members for obtaining an A phase magnetic encoder signal, and a second output terminal connected to a connecting point between said b and b' phase magnetoresistive element members for obtaining a B phase magnetic encoder signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |