EP0107982A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Magnetic transducer heads utilising magnetoresistance effect
Assignee: Sony Corp
•
Filing: 1983-10-28
•
Granted: —
•
Expires: 2003-10-28
Abstract
Abstract A magnetic transducer head utilising magnetoresistance effect comprises means for applying a constant voltage (V 1 , V 2 ) to both ends of at least one pair of magnetoresistance effect elements (MR n1 , MR n2 ) connected in series on a discontinuous portion other than a magnetic gap of a magnetic core forming a magnetic gap, and means for applying bias magnetic fields (H B , -H B ) of opposite polarity to the respective magnetoresistance effect elements, an output being derived from a connection point between the pair of magnetoresistance effect elements.
Inventors
- 👤 Yutaka Souda
- 👤 Shigeyoshi Imakoshi
- 👤 Hideo Suyama
- 👤 Hiroyuki Uchida
- 👤 Yasuhiro Iida
- 👤 Tetsuo Sekiya
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 01:03
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/39; G11B5/3903; G11B5/40
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
75 words
A magnetic transducer head utilising magnetoresistance effect, the transducer head being characterised by: a magnetoresistance effect element (4) provided on a discontinuous portion (G) other than a magnetic gap of a magnetic core (6, 7) forming the magnetic gap; and a bias conductor member (2) for applying a bias magnetic field to the magnetoresistance effect element (4), the magnetic core (6, 7), magnetoresistance effect element (4) and bias conductor member (2) being electrically connected together.
Claim 2
Dependent Claim
75 words
A magnetic transducer head utilising magnetoresistance effect, the transducer head being characterised by: a magnetoresistance effect element (4) provided on a discontinuous portion (G) other than a magnetic gap of a magnetic core (6, 7) forming the magnetic gap; and a bias conductor member (2) for applying a bias magnetic field to the magnetoresistance effect element (4), the magnetic core (6, 7), magnetoresistance effect element (4) and bias conductor member (2) being electrically connected together.
Claim 3
Dependent Claim
41 words
A magnetic transducer head according to claim 1, which is a multi- channel magnetic transducer head having a magnetoresistance effect element for each channel, the magnetic core, magnetoresistance effect element and bias conductor member of the channels being electrically connected together.
Claim 4
Dependent Claim
28 words
A magnetic transducer head according to claim 1 or claim 2, wherein at least one of the magnetic core, magnetoresistance effect element and bias conductor member is grounded.
Claim 5
Dependent Claim
100 words
A magnetic transducer head utilising magnetoresistance effect, the transducer head being characterised by: means for applying a constant voltage (V,, V 2 ) to both ends of at least one pair of magnetoresistance effect elements (MRnl, MR n2 ) connected in series on a discontinuous portion (G) other than a magnetic gap of a magnetic core forming the magnetic gap; and means for applying bias magnetic fields (H B , -H B ) of opposite polarity to the pair of magnetoresistance effect elements, an output being derived in use from a connection point between the pair of magnetoresistance effect elements.
Claim 6
Dependent Claim
100 words
A magnetic transducer head utilising magnetoresistance effect, the transducer head being characterised by: means for applying a constant voltage (V,, V 2 ) to both ends of at least one pair of magnetoresistance effect elements (MRnl, MR n2 ) connected in series on a discontinuous portion (G) other than a magnetic gap of a magnetic core forming the magnetic gap; and means for applying bias magnetic fields (H B , -H B ) of opposite polarity to the pair of magnetoresistance effect elements, an output being derived in use from a connection point between the pair of magnetoresistance effect elements.
Claim 7
Dependent Claim
20 words
A magnetic transducer head according to claim 2, comprising a bias conductor member (22) for generating the bias magnetic fields.
Claim 8
Dependent Claim
30 words
A magnetic transducer head according to claim 4 or claim 5, which is a multichannel magnetic transducer head having at least one pair of magnetoresistance effect elements for each channel.
Claim 9
Dependent Claim
52 words
A magnetic transducer head according to claim 6, comprising a bias conductor member (22) for each channel for generating the bias magnetic fields, each bias conductor member extending parallel to the pair of magnetoresistance effect elements of the associated channel and the bias conductors of adjoining channels being electrically connected in series.
Claim 10
Dependent Claim
36 words
A magnetic transducer head according to any one of claims 4 to 7, comprising means for making uniform the strengths of the bias magnetic fields of opposite polarity applied to the pair of magnetoresistance effect elements.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.