公开(公告)号：US5572379A

公开(公告)日：1996-11-05

申请号：US305193

申请日：1994-09-13

申请人： Hajime Aoi ,  Toshiaki Tsuyoshi ,  Makoto Koizumi ,  Nobumasa Nishiyama ,  Yoshibumi Matsuda ,  Takuji Ogawa ,  Kazuhisa Shiraishi

发明人： Hajime Aoi ,  Toshiaki Tsuyoshi ,  Makoto Koizumi ,  Nobumasa Nishiyama ,  Yoshibumi Matsuda ,  Takuji Ogawa ,  Kazuhisa Shiraishi

IPC分类号： G11B5/02 ,  G11B5/00 ,  G11B5/012 ,  G11B5/09 ,  G11B5/39 ,  G11B5/40 ,  G11B5/55 ,  G11B5/596 ,  G11B19/02 ,  G11B19/04 ,  G11B27/30 ,  G11B27/36 ,  G11B5/03 ,  G11B5/127 ,  G11B5/33

CPC分类号： G11B19/04 ,  G11B19/02 ,  G11B27/3027 ,  G11B27/36 ,  G11B5/00 ,  G11B5/012 ,  G11B5/40 ,  G11B5/5547 ,  G11B2005/0016 ,  G11B2005/0018 ,  G11B5/59683

摘要： In a magnetic recording drive having a plurality of magnetic heads each employing a magnetoresistive sensor for the purpose of averaging the time required for sense currents to be caused to flow through the respective magnetoresistive sensors to shorten the longest reproducing time and to suppress the degradation of the characteristics due to the electromigration, thereby improving the reliability of the magnetic recording drive, the magnetic recording drive includes circuits for averaging the useful life depending on the currents caused to flow through the respective magnetoresistive sensors among the plurality of magnetic heads, whereby the time required for the sense current to be caused to flow through one MR reproducing head is greatly shortened. Therefore, the levels of outputs of the MR reproducing heads can be increased without reduction of the reliability and thus the reliability of the magnetic recording drive can be improved.

摘要翻译： 在具有多个磁头的磁记录驱动器中，每个磁头采用磁阻传感器，用于平均要使感应电流流过各磁阻传感器所需的时间，以缩短最长再现时间并抑制 由于电迁移的特性，从而提高了磁记录驱动器的可靠性，磁记录驱动器包括用于根据流过多个磁头中的相应磁阻传感器的电流来平均使用寿命的电路，由此所需的时间 使得通过一个MR再现头流动的感测电流大大缩短。 因此，可以在不降低可靠性的情况下增加MR再现头的输出电平，从而可以提高磁记录驱动器的可靠性。

公开(公告)号：US5337198A

公开(公告)日：1994-08-09

申请号：US909997

申请日：1992-07-07

申请人： Nobumasa Nishiyama ,  Toshiaki Tsuyoshi ,  Hajime Aoi ,  Tetsuji Kameoka ,  Masaya Tanaka ,  Kazuhisa Shiraishi

发明人： Nobumasa Nishiyama ,  Toshiaki Tsuyoshi ,  Hajime Aoi ,  Tetsuji Kameoka ,  Masaya Tanaka ,  Kazuhisa Shiraishi

IPC分类号： G11B5/09 ,  G11B5/035

CPC分类号： G11B5/09 ,  G11B20/10046

摘要： A waveform equalizer for processing a signal read by a magnetic head from a magnetic written medium includes a slimming circuit which, in turn, has a first delay unit for delaying the read signal, a first attenuator connected in parallel with the first delay unit, a first differentiating circuit for receiving the output from the first delay unit and the output from the first attenuator, and a resistor connected to a first delay unit side input of the first differential circuit; and a pseudo-peak elimination circuit connected in series with the slimming circuit and including a circuit for separating the from the read signal the read signal or a signal reverse in phase to the read signal, a second delay unit for delaying the separated signal, a second attenuator for attenuating the amplitude of the separated signal, and a second differential circuit for receiving the read signal and the separated, delayed and attenuated signal.

摘要翻译： 用于处理由磁性写入介质由磁头读取的信号的波形均衡器包括减弱电路，该减幅电路又具有用于延迟读取信号的第一延迟单元，与第一延迟单元并联连接的第一衰减器， 用于接收来自第一延迟单元的输出和来自第一衰减器的输出的第一微分电路，以及连接到第一差分电路的第一延迟单元侧输入的电阻器; 以及与所述减肥电路串联连接的伪峰值消除电路，并且包括用于将读取信号或相反相反的信号与读取信号分离的读取信号的电路，用于延迟分离的信号的第二延迟单元， 第二衰减器，用于衰减分离信号的振幅;以及第二差分电路，用于接收读取信号和分离的，延迟和衰减的信号。

公开(公告)号：US4755891A

公开(公告)日：1988-07-05

申请号：US898212

申请日：1986-08-20

申请人： Yasuhiro Katoh ,  Fumio Kugiya ,  Hajime Aoi

发明人： Yasuhiro Katoh ,  Fumio Kugiya ,  Hajime Aoi

IPC分类号： G11B5/09 ,  G11B5/02 ,  G11B20/10 ,  G11B5/23

CPC分类号： G11B20/10046 ,  G11B20/10009 ,  G11B5/02

摘要： In a waveform processing circuit comprising a delay line for delaying a signal outputted from a ring type magnetic head reproducing a perpendicular magnetization recording, an attenuator for attenuating the signal delivered out of the ring type magnetic head, and a differential amplifier for receiving outputs from the delay line and the attenuator, wherein a waveform of the signal is processed to discriminate a position of magnetization transition based on the waveform of the signal; the delay time .tau. of the delay line is selected to satisfyv.multidot..tau..ltoreq.gwhere, v is a relative speed between the recording medium and the magnetic head and g indicates the gap length of the magnetic head.

摘要翻译： 在波形处理电路中，包括用于延迟从再现垂直磁化记录的环形磁头输出的信号的延迟线，用于衰减从环型磁头输出的信号的衰减器，以及差分放大器，用于接收来自 延迟线和衰减器，其中处理信号的波形以基于信号的波形来识别磁化转变的位置; 选择延迟线的延迟时间τ以满足vx tau，其中v是记录介质和磁头之间的相对速度，g表示磁头的间隙长度。