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1. 发明公开

EP0111755A3 Dual element magnetic transducer 失效
标题翻译：双元素磁传感器
公开(公告)号：EP0111755A3
公开(公告)日：1986-07-30
申请号：EP83111414
申请日：1983-11-15
申请人： International Business Machines Corporation
发明人： Best, John Stewart , Lee, Kenneth , Tsang, Ching Hwa
IPC分类号： G11B05/127 , G11B05/33 , G11B05/39 , G11B05/31
CPC分类号： G11B5/3912 , G11B5/3967 , G11B5/398 , G11B5/399
摘要： A dual element magnetic transducer in which the thin film M/R read element is transversely biased by flux in the air gap of the inductive write core generated by a bias current supplied to the write winding. Flux in the air gap biases the M/R element because different integral portions of the M/R element have a different spatial relationship to parallel opposing portions of the inductive core. The flux which would normally pass through the gap substantially normal to the sides of the core defining the gap now tends to follow the M/R element along a direction normal or transverse to the media to a point where the distance between the M/R element and the core is smaller than where it entered. By appropriate control of the bias current and the spatial relationships, a relatively efficient, simple to manufacture dual element magnetic transducer is provided.

2. 发明申请

WO1988007741A1 MAGNETO-RESISTIVE THIN FILM HEAD FOR DIGITAL MAGNETIC STORAGE DEVICE 审中-公开
标题翻译：用于数字磁性存储器件的磁阻薄膜头
公开(公告)号：WO1988007741A1
公开(公告)日：1988-10-06
申请号：PCT/US1988000908
申请日：1988-03-21
申请人： DIGITAL EQUIPMENT CORPORATION
发明人： DIGITAL EQUIPMENT CORPORATION , DAS, Shyam
IPC分类号： G11B05/39
CPC分类号： G11B5/3925 , G11B5/09 , G11B5/11 , G11B5/3903 , G11B5/3954 , G11B5/398 , G11B2005/0008
摘要： A read/write head for use in a magnetic storage device in a digital data processing system for writing data in the form of magnetic flux onto, and reading data from a spinning magnetic disk. The head has two magnetic pole pieces (11, 12) each with a yoke region (13) which tapers to a pole tip (14) and an energizable coil (16) situated between the pole pieces in the yoke region for generating magnetic flux. One of the pole pieces has a slot (17) in the yoke region, and a strip (20) of magneto-resistive material is situated adjacent the slot. The magneto-resistive strip is adapted to be connected to sensing equipment which measures variations in the resistance of the magneto-resistive strip in response to the variations in the magnetic flux recorded on the media. Several slots may be formed in the pole pieces, and an elongated magneto-resistive strip (42) may be situated adjacent the slots.
摘要翻译：一种用于数字数据处理系统中的磁存储装置的读/写头，用于以磁通量的形式将数据写入到旋转磁盘上并从旋转磁盘读取数据。头部具有两个磁极片（11,12），每个磁极片具有对磁极尖端（14）逐渐变细的磁轭区域（13）和位于磁轭区域中的极靴之间的可激励线圈（16），用于产生磁通量。极片中的一个在磁轭区域中具有槽（17），并且磁阻材料的带（20）位于槽附近。磁阻带适于连接到感测设备，该感测设备测量响应于记录在介质上的磁通量的变化的磁阻带的电阻的变化。可以在极片中形成多个槽，并且细长的磁阻条（42）可以位于槽附近。

3. 发明公开

EP0171956A3 Permanent magnet biased narrow track magnetoresistive transducer 失效
标题翻译：永磁放电轨道磁阻传感器
公开(公告)号：EP0171956A3
公开(公告)日：1987-03-25
申请号：EP85305326
申请日：1985-07-25
申请人： AMPEX CORPORATION
发明人： Lundquist, Jerry R. , Bertram, H. Neal
IPC分类号： G11B05/39
CPC分类号： G11B5/3903 , G11B5/3932
摘要： A narrow track magnetoresistive transducer has a square shaped bias permanent magnet (44) superposed with an MR element (40). The square shaped magnet provides bias field components of substantially the same magnitude in both hard and easy axis directions of the MR element. A stable and uniform bias field is thereby obtained.

4. 发明公开

EP0107982A3 Magnetic transducer heads utilising magnetoresistance effect 失效
标题翻译：磁性传感器头使用磁阻效应
公开(公告)号：EP0107982A3
公开(公告)日：1987-01-14
申请号：EP83306602
申请日：1983-10-28
申请人： SONY CORPORATION
发明人： Souda, Yutaka , Imakoshi, Shigeyoshi , Suyama, Hideo , Uchida, Hiroyuki , Iida, Yasuhiro , Sekiya, Tetsuo
IPC分类号： G11B05/39
CPC分类号： G11B5/3903 , G11B5/40
摘要： 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.

5. 发明公开

EP0204902A3 Yoke type magnetic transducer head utilizing a magnetoresistance effect 失效
标题翻译： YOKE型磁力传感器头使用磁阻效应
公开(公告)号：EP0204902A3
公开(公告)日：1988-09-28
申请号：EP86103693
申请日：1986-03-19
申请人： SONY CORPORATION
发明人： Imakoshi, Shigeyoshi , Suyama, Hideo , Soda, Yutaka , Fukuyama, Munekatsu
IPC分类号： G11B05/39 , G01D05/14
CPC分类号： G01D5/142 , G11B5/3903
摘要： A yoke tyope magnetic transducer head utilizing a magnetoresistance effect in which a magnetoresistance effect sensing portion (5) is provided so as to magnetically couple a cut-away portion in a magnetic circuit including an operation gap (g) and a magnetic yoke (8) having in its one portion the cut-away portion and in which a first bias magnetic field is applied to the magnetoresistance effect sensing portion (5) by a first magnetic flux that is generated when a current is flowed through the magnetoresistance effect sensing portion (5), or when a current is flowed through both the magnetoresistance effect Isensing portion (5) and a bias conductor (3), which includes a hard magnetic layer (14) for generating a second magnetic flux by which a second bias magnetic field is applied to the magnetoresistance effect sensing portion (5) and for passing through the magnetic yoke (8) a magnetic flux which cancels at least a part of the first magnetic flux which passes through the magnetic yoke (8).

6. 发明公开

EP0131727A3 Two-module-head, read-after-write bi-directional tape drive 失效
标题翻译：双模头，阅读后写入双向磁带驱动器
公开(公告)号：EP0131727A3
公开(公告)日：1987-08-26
申请号：EP84106171
申请日：1984-05-30
申请人： International Business Machines Corporation
发明人： Fields, Davis Stuart, Jr.
IPC分类号： G11B27/36 , G11B15/12 , G11B05/008 , G11B05/48 , G11B05/265 , G11B05/39
CPC分类号： G11B5/00817 , G11B5/4893 , G11B15/12 , G11B20/1816 , G11B27/36
摘要： A digital tape drive wherein tape is written, and a read-after-write operation is immediately performed to check the integrity of the write operation, for either direction (11, 12) of tape movement. The tape (10) contains a plurality of parallel data tracks. Two read/write head modules (14, 15) span the entire tape. The read (R) and write (W) gaps of each module are alternately spaced across the width of the tape, such that the write gaps of one module are aligned with the read gaps of the other module. When one module is selected for writing, as a function of the direction of tape movement, the other module is selected to read-after-write check the first module's written data. One module (14) writes odd-track data during one direction (11) of tape movement, and reads even-track data during the opposite direction (12) of tape movement; as the other module (15) writes even-track data during said opposite movement direction (12), and reads odd-track data during said one movement direction (11). Common read and write electronic circuits are switched between the two modules, since each module is using only one of its read and write gap multiples at any given time.

7. 发明公开

EP0178898A3 An inductive magnetic transducer 失效
标题翻译：电感式磁传感器
公开(公告)号：EP0178898A3
公开(公告)日：1988-03-30
申请号：EP85307401
申请日：1985-10-15
申请人： International Business Machines Corporation
发明人： Argumedo, Armando Jesus , Schmalhorst, Joseph Martin
IPC分类号： G11B05/31 , G11B05/29 , G11B05/39
CPC分类号： G11B5/3903 , G11B5/127 , G11B5/17 , G11B5/29 , G11B5/3116 , G11B5/312 , G11B5/3967
摘要： An inductive magnetic transducer for a multiple track head has a soft magnetic material closure pad (24) formed across a multiturn coil (22). The closure pad (24) has a width corresponding to the track width at the front gap of the transducer and a width at the back gap area (12) of the transducer which is less than the width of the innermost turn of the coil (22).
摘要翻译：用于多轨头的感应式磁换能器具有横跨多圈线圈（22）形成的软磁材料封闭垫（24）。闭合垫（24）的宽度对应于换能器的前间隙处的轨道宽度，并且换能器的后间隙区域（12）处的宽度小于线圈（22）的最内圈的宽度）。

8. 发明公开

EP0242887A3 Buried servo recording system having dual transducers 失效
标题翻译：具有双向传感器的BURIED伺服记录系统
公开(公告)号：EP0242887A3
公开(公告)日：1988-01-07
申请号：EP87106964
申请日：1983-11-02
申请人： NEC CORPORATION
发明人： Tanaka, Hideo c/o NEC Corporation
IPC分类号： G11B05/58 , G11B05/31 , G11B05/39 , G11B05/596
CPC分类号： G11B5/3903 , G11B5/3103 , G11B5/3116 , G11B5/58 , G11B5/5965
摘要： The magnetic recorder has a pair of first and second transducers (5a,5b) arranged in the longitudinal direction of a record track (6). The magnetic recorder exchanges signals with a magnetic record medium (1) having a servo control signal prerecorded in a lower layer (3a) of said medium (1). A recording circuit (8) is connected to the first transducer (5a) for recording a data signal along the record track (6) in an upper layer (3b) of the medium (1). A reading circuit (9,10) is connected to one of the first and second transducers (5a,5b) for reading the recorded data signal. The second transducer (5b) is connected to a servo control circuit connected for reading the prerecorded servo control signal (12 to 15) and deriving therefrom a position error signal in response to which the position of the transducers (5a,5b) is controlled.

9. 发明公开

EP0180201A3 Multi-channel magnetic transducer head utilizing magnetoresistance effect 失效
标题翻译：多通道磁传感器头使用磁阻效应
公开(公告)号：EP0180201A3
公开(公告)日：1988-03-16
申请号：EP85113757
申请日：1985-10-29
申请人： SONY CORPORATION
发明人： Seko, Satoru c/o Sony Corporation , Soda, Yutaka c/o Sony Corporation , Uchida, Hiroyuki c/o Sony Corporation , Sekiya, Tetsuo c/o Sony Corporation
IPC分类号： G11B05/39 , G11B05/31 , G11B05/33
CPC分类号： G11B5/3925 , G11B5/3977 , G11B5/488
摘要： A multi-channel magnetoresistance effect type magnetic head has a short wavelength region magnetic head element (MR and/or MRaux) and a relatively longer wavelength region magnetic head element (MRcue). The two head elements are provided on a magnetic substrate (1) with each having a magnetic circuit containing a magnetic gap (G) facing a surface adjacent to and across from a magnetic recording medium. Each magnetic circuit has a discontinuity portion with a bridging magnetoresistance effect sensing element to magnetically connect the discontinuity portion. The longer wavelength magnetic head discontinuity portion is spaced at a greater distance (L2) from the adjacent surface than is the discontinuity portion of the shorter wavelength magnetic head element (MR, MRaux).

10. 发明公开

EP0154307A3 Magnetic transducer head utilizing the magnetoresistance effect 失效
标题翻译：磁传感器头使用磁阻效应
公开(公告)号：EP0154307A3
公开(公告)日：1987-12-23
申请号：EP85102282
申请日：1985-02-28
申请人： SONY CORPORATION
发明人： Imakoshi, Shigeyoshi , Suyama, Hideo , Soda, Yutaka , Fukuyama, Munekatsu , Iida, Yasuhiro
IPC分类号： G11B05/39 , G11B05/02
CPC分类号： G11B5/02 , G11B5/3903 , G11B2005/0016
摘要： A magnetoresistance effect type magnetic transducer head apparatus comprises a magnetoresistance effect sensing element (5), means (f c ) for applying high-frequency magnetic field to the sensing element (5), means (16, 19) for taking-out output signal from the sensing element (5), a filter (21) for taking-out the high-frequency component of the output, and another filter (20) for rectifying the output and taking-out the low-frequency component. The magnetic head apparatus may be constituted as digital circuit and a multi-channel apparatus can be implemented.

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