会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 6. 发明专利
    • MAGNETIC DISK DEVICE
    • JPH01144280A
    • 1989-06-06
    • JP30368587
    • 1987-11-30
    • MITSUBISHI ELECTRIC CORP
    • UCHINO YASUNORIISHITOBI CHIKATO
    • G11B21/08
    • PURPOSE:To obtain high-speed characteristic by counting the seek time of a carriage, comparing the seek time obtained from the above counting with a reference seek time, and supplying a signal to command the seek speed of a magnetic head and a signal to command the seek direction of the magnetic head relating to a compared result to a carriage driving circuit. CONSTITUTION:A counter means 21 counts the seek time of the magnetic head 3 at every seek direction. An output control means 23 compares the seek time of the magnetic head 3 with a reference seek operation time, and increases/ decreases output relating to the compared result, and supplies its output to the driving circuit 5 of the carriage 4 on which the magnetic head 3 is mounted, then, the seek operation of the magnetic head 3 is performed. Thereby, difference in the seek speed of the magnetic head 3 can be adjusted for every seek direction of the carriage 4. In such a way, it is possible to always obtain the high-speed characteristic in spite of the seek direction.
    • 7. 发明专利
    • MAGNETIC DISK DEVICE
    • JPH01125774A
    • 1989-05-18
    • JP28403887
    • 1987-11-10
    • MITSUBISHI ELECTRIC CORP
    • UCHINO YASUNORIISHITOBI CHIKATO
    • G11B21/10
    • PURPOSE:To simplify the adjusting operation of the level of a position signal and to prevent a seek error from being generated by setting the magnification of the position signal at a prescribed value while a servo head stays on an inner guard band, multiplying the position signal while moving the servo head by the magnification, and performing the position control of the servo head based on an obtained position signal. CONSTITUTION:The servo head 1 waits on the inner guard band by an auto lock mechanism, etc., when no read and write on a magnetic disk is performed, however, the magnification is decided so that the position signal PS can be set at the prescribed value while the servo head stays on the inner guard band, and the magnification is multiplied by the position signal PS while moving the servo head 1, and the positioning control of the servo head 1 is performed based on the obtained position signal PSA. In such a way, it is possible to simplify the adjusting operation of the level of the position signal, and to prevent the seek error from being generated.
    • 10. 发明专利
    • MEMORY DEVICE
    • JPS6421712A
    • 1989-01-25
    • JP17582087
    • 1987-07-16
    • MITSUBISHI ELECTRIC CORP
    • ISHITOBI CHIKATO
    • G11B5/596
    • PURPOSE:To easily perform the detection of a reference track, by loading a first servo head and a second servo head at an inner peripheral side inner than the first servo head by an interval equivalent to one track pitch confronting with a servo plane. CONSTITUTION:A servo disk is rotated in a rotating device, and the first servo head 30 is confronted with the servo plane of the servo disk, and the second servo head 31 is loaded at a position moved by the interval equivalent to one track pitch to the inner peripheral side inner than the first servo head 30 confronting with the servo plane similarly as the first servo head 30. And when the first servo head 30 advances to an outer guard band 2, a reference track signal is detected by a reference track detecting means, and the second servo head 31 is positioned at the reference track. In such a way, it is possible to shorten a time from the detection of the reference track to the positioning of the servo head.