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    • 2. 发明授权
    • Flux cancelling yoke type magnetic transducer head
    • 磁通消除轭型磁换能器头
    • US4734644A
    • 1988-03-29
    • US841259
    • 1986-03-19
    • Shigeyoshi ImakoshiHideo SuyamaYutaka SodaMunekatsu Fukuyama
    • Shigeyoshi ImakoshiHideo SuyamaYutaka SodaMunekatsu Fukuyama
    • G01D5/14G01D5/16G11B5/39G01R33/02H01L43/00
    • G01D5/142G11B5/3903
    • A yoke type magnetic transducer head utilizing a magnetoresistance effect in which a magnetoresistance effect sensing portion is provided so as to magnetically couple a cut-away portion in a magnetic circuit including an operation gap and a magnetic yoke 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 by a first magnetic flux that is generated when a current is flowed through the magnetoresistance effect sensing portion, or when a current is flowed through both the magnetoresistance effect sensing portion and a bias conductor, which includes a hard magnetic layer for generating a second magnetic flux by which a second bias magnetic field is applied to the magnetoresistance effect sensing portion and for passing through the magnetic yoke a magnetic flux which cancels at least a part of the first magnetic flux which passes through the magnetic yoke.
    • 一种利用磁阻效应的磁轭型磁换能器头,其中磁阻效应感测部分被设置为磁耦合包括操作间隙的磁路中的切除部分和在其一部分中被切除的磁轭 并且其中通过在电流流过磁阻效应感测部分时产生的第一磁通量或当电流流过磁阻效应感测部分两者时,第一偏置磁场施加到磁阻效应感测部分 以及偏置导体,其包括用于产生第二磁通量的硬磁性层,通过该硬磁性层将第二偏置磁场施加到磁阻效应感测部分,并且通过磁轭,磁通量抵消了至少一部分 第一磁通量通过磁轭。
    • 10. 发明授权
    • Tracking servo system for disc memory
    • 磁盘存储器跟踪伺服系统
    • US4701815A
    • 1987-10-20
    • US836714
    • 1986-03-06
    • Hiroaki YadaShigeyoshi ImakoshiHideo SuyamaTetsuo SekiyaMasayuki Nakayama
    • Hiroaki YadaShigeyoshi ImakoshiHideo SuyamaTetsuo SekiyaMasayuki Nakayama
    • G11B5/596
    • G11B5/59655
    • A servo system for positioning a data transducer head relative to a plurality of substantially concentric data tracks on the surface of a magnetic disc including a pair of servo transducer heads for sensing the data tracks and generating output signals representative of a data signal written on the sensed track, a distance between the pair of servo transducer heads being related to the dimension of the data track and a distance between the servo transducer heads and the data transducer head being related to a data track pitch, a signal processing circuit connected to the pair of servo transducer heads for generating a data transducer head positioning signal and a positioning device for positioning the data transducer head in response to the transducer positioning signal and for maintaining the track centerline alignment of the data transducer head.
    • 一种伺服系统,用于相对于包括一对伺服换能器头的磁盘表面上的多个基本上同心的数据磁道定位数据传感器头,用于感测数据磁道并产生表示写入感测到的数据信号的数据信号的输出信号 一对伺服传感器头之间的距离与数据轨道的尺寸相关,并且伺服换能器头与数据传感器头之间的距离与数据轨道间距相关,信号处理电路连接到一对 用于产生数据传感器头定位信号的伺服换能器头和用于响应于换能器定位信号定位数据换能器头并用于维持数据换能器头的轨道中心线对准的定位装置。