GB1235857A - Improvements in or relating to hall effect magnetic record reading heads - Google Patents

Improvements in or relating to hall effect magnetic record reading heads

Info

Publication number
GB1235857A
GB1235857A GB45293/67A GB4529367A GB1235857A GB 1235857 A GB1235857 A GB 1235857A GB 45293/67 A GB45293/67 A GB 45293/67A GB 4529367 A GB4529367 A GB 4529367A GB 1235857 A GB1235857 A GB 1235857A
Authority
GB
United Kingdom
Prior art keywords
units
hall effect
areas
head
hall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB45293/67A
Inventor
Christopher John Bonny
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB45293/67A priority Critical patent/GB1235857A/en
Priority to FR1588638D priority patent/FR1588638A/fr
Priority to DE19681801338 priority patent/DE1801338A1/en
Publication of GB1235857A publication Critical patent/GB1235857A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/37—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using galvano-magnetic devices, e.g. Hall-effect devices using Hall or Hall-related effect, e.g. planar-Hall effect or pseudo-Hall effect
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/37—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using galvano-magnetic devices, e.g. Hall-effect devices using Hall or Hall-related effect, e.g. planar-Hall effect or pseudo-Hall effect
    • G11B5/376—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using galvano-magnetic devices, e.g. Hall-effect devices using Hall or Hall-related effect, e.g. planar-Hall effect or pseudo-Hall effect in semi-conductors
    • G11B5/378—Integrated structures
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N52/00—Hall-effect devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Measuring Magnetic Variables (AREA)
  • Magnetic Heads (AREA)

Abstract

1,235,857. Hall effect reading heads. MARCONI CO. Ltd. 24 June, 1968 [4 Oct., 1967], No. 45293/67. Heading G5R. A Hall effect reading head comprises two Hall generator units connected so as to provide an output which is a function of the difference between the magnetic fields detected by the units individually. Such a head may be used to read a record of alternating polarities or areas of high and low intensity, such as on the rotor of a magnetic encoder, so as to eliminate the effects of spurious magnetic fields. The head consists of two sub heads H1, H2 each comprising two Hall units A, B spaced so as to overlie similar magnetic areas on a tape R such that their individual outputs are additive, but the sub heads H1, H2 themselves overlie dissimilar areas. The units are driven by A.C. or D.C. power and are either connected as shown or back-to-back (Figs. 2-4, not shown) with the units oppositely poled. The output at terminals a, c is fed to a differential amplifier. The head assembly is manufactured by conventional deposition of semi-conductor, insulation and contact metal films on a substrate in that or the reverse order.
GB45293/67A 1967-10-04 1967-10-04 Improvements in or relating to hall effect magnetic record reading heads Expired GB1235857A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB45293/67A GB1235857A (en) 1967-10-04 1967-10-04 Improvements in or relating to hall effect magnetic record reading heads
FR1588638D FR1588638A (en) 1967-10-04 1968-10-04
DE19681801338 DE1801338A1 (en) 1967-10-04 1968-10-04 Magnetic hall effect reading head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB45293/67A GB1235857A (en) 1967-10-04 1967-10-04 Improvements in or relating to hall effect magnetic record reading heads

Publications (1)

Publication Number Publication Date
GB1235857A true GB1235857A (en) 1971-06-16

Family

ID=10436651

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45293/67A Expired GB1235857A (en) 1967-10-04 1967-10-04 Improvements in or relating to hall effect magnetic record reading heads

Country Status (3)

Country Link
DE (1) DE1801338A1 (en)
FR (1) FR1588638A (en)
GB (1) GB1235857A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2592611A (en) * 2020-03-03 2021-09-08 Zf Automotive Uk Ltd A magnetic encoder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2592611A (en) * 2020-03-03 2021-09-08 Zf Automotive Uk Ltd A magnetic encoder
US11536591B2 (en) 2020-03-03 2022-12-27 ZF Automotive UK Limited Magnetic encoder

Also Published As

Publication number Publication date
FR1588638A (en) 1970-04-17
DE1801338A1 (en) 1969-05-08

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