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1. 发明授权

US06804074B2 PLL circuit and recording and playback apparatus using same 失效
标题翻译： PLL电路和使用其的记录和播放装置
公开(公告)号：US06804074B2
公开(公告)日：2004-10-12
申请号：US09862422
申请日：2001-05-23
申请人： Norio Shoji , Junkichi Sugita , Kimimasa Senba , Toshihiro Kawakubo
发明人： Norio Shoji , Junkichi Sugita , Kimimasa Senba , Toshihiro Kawakubo
IPC分类号： G11B509
CPC分类号： H03L7/091 , G11B20/1403 , H03L7/14
摘要： A PLL circuit functioning as a clock recovery circuit in a tape recording and playback apparatus employing the PRML method has a level determining circuit for detecting that head output level (signal level) is at or lower than a certain level during track crossing for a high-speed search, and effects a hold on a loop filter according to a level determination output to thereby hold PLL operation, whereby the PLL behavior is not disturbed by a noise component occurring during track crossing. Thus, it is possible to stabilize search operation and increase the design margin.
摘要翻译：在使用PRML方法的磁带记录和重放装置中用作时钟恢复电路的PLL电路具有一个电平确定电路，用于在磁道交叉处检测磁头输出电平（信号电平）等于或低于一定电平，速度搜索，并根据电平确定输出对环路滤波器产生保持，从而保持PLL操作，从而PLL行为不受轨道交叉期间发生的噪声分量的干扰。因此，可以稳定搜索操作并增加设计余量。

2. 发明授权

US06597650B2 Nonlinearity compensation circuit and method, control circuit and method for nonlinearity compenstation circuit and recording and/or playback apparatus employing the same 失效
标题翻译：用于非线性补偿电路的非线性补偿电路和方法，控制电路和方法以及采用该非线性补偿电路的记录和/或重放装置
公开(公告)号：US06597650B2
公开(公告)日：2003-07-22
申请号：US09870714
申请日：2001-06-01
申请人： Masayuki Katakura , Junkichi Sugita , Norio Shoji , Masato Sekine , Kimimasa Senba , Katsuhisa Daio
发明人： Masayuki Katakura , Junkichi Sugita , Norio Shoji , Masato Sekine , Kimimasa Senba , Katsuhisa Daio
IPC分类号： G11B700
CPC分类号： G06G7/24
摘要： A nonlinearity compensation circuit is disclosed which includes an inverse hyperbolic function generation circuit for converting differential currents corresponding to input signals in+ and in− into differential voltages which increase in proportion to an inverse hyperbolic function, an offset provision circuit for providing an offset corresponding to control signals c+ and c− to the differential voltages outputted from the inverse hyperbolic function generation circuit and a hyperbolic function generation circuit for converting the differential voltages to which the offset has been provided by the offset provision circuit into signals which increase in proportion to a hyperbolic function and outputting the resulting signals as output signals out+ and out−. Consequently, compensation for the nonlinearity such as second order distortion can be performed for the read signal from a recording medium.
摘要翻译：公开了一种非线性补偿电路，其包括反相双曲线函数产生电路，用于将对应于+中的输入信号的差分电流转换为与反双曲线函数成比例增加的差分电压;偏移提供电路，用于提供与控制相对应的偏移信号c +和c-对应于从反双曲函数生成电路输出的差分电压，以及双曲线函数生成电路，用于将由偏移提供电路提供的偏移的差分电压转换为与双曲线函数成比例增加的信号并将所得信号作为输出信号out +和out输出。因此，可以对来自记录介质的读取信号执行诸如二阶失真之类的非线性的补偿。

3. 发明授权

US5274510A Track address pattern for a disk memory apparatus 失效
标题翻译：跟踪磁盘存储设备的地址模式
公开(公告)号：US5274510A
公开(公告)日：1993-12-28
申请号：US703200
申请日：1991-05-20
申请人： Junkichi Sugita , Masami Kashiwagi
发明人： Junkichi Sugita , Masami Kashiwagi
IPC分类号： G11B20/12 , G11B5/596 , G11B21/10 , G11B5/09
CPC分类号： G11B5/59633
摘要： A track address pattern suitable for being applied to a magnetic disk apparatus which positions a head to a track with a desired address by a sector servo system, for example, wherein a gray code of a plurality of bits corresponding to a track address of the magnetic disk apparatus is divided per 2 bits thereof into groups, the respective groups of 2 bits are converted into codes of 3 bits (001), (010), (100) and (111) depending on the values thereof, respectively, whereby the converted codes are recorded on the magnetic disk as the track address pattern.

4. 发明授权

US5191568A Disc drive apparatus with tracking control based on multiple reference tracks and with automatic seek time adjustment 失效
标题翻译：具有基于多个参考轨迹的跟踪控制和自动寻道时间调整的盘驱动装置
公开(公告)号：US5191568A
公开(公告)日：1993-03-02
申请号：US628475
申请日：1990-12-17
申请人： Takayasu Muto , Mamoru Osato , Junkichi Sugita , Masami Kashiwagi , Toru Tanaka , Hidekazu Seto
发明人： Takayasu Muto , Mamoru Osato , Junkichi Sugita , Masami Kashiwagi , Toru Tanaka , Hidekazu Seto
IPC分类号： G11B5/55 , G11B7/085 , G11B7/09 , G11B21/08
CPC分类号： G11B5/5547 , G11B21/085 , G11B7/08517 , G11B7/08588 , G11B7/0901
摘要： The present invention provides a disc drive apparatus having an improved tracking control and seek time adjustment. The head tracking error distribution along the disc radius is determined with reference to the phases of a plurality of position sensors and is calculated based on the tracking error of a reference track in first and second reference regions with respect to the signal from one of the position sensors. This information is used to determine the tracking error distribution along the disc radius with respect to that one of the position sensors. The tracking error distribution is used to determine the tracking error of a reference track in a third reference region with respect to the signal from the same position sensor. This tracking error is used to determine the tracking error of other reference tracks in the third reference region with respect to the signals from other of the position sensors. The tracking error of the reference tracks is then used to determine the tracking error of the data tracks on the disc. The present invention also provides a disc drive apparatus having an automatic seek time adjustment. A predetermined number of tracks is moved through based on a set head velocity. The seek time is compared to a prescribed seek time. If the two times differ, the velocity is adjusted until the prescribed seek time is achieved.
摘要翻译：本发明提供一种具有改进的跟踪控制和寻道时间调整的盘驱动装置。参考多个位置传感器的相位确定沿着盘半径的磁头跟踪误差分布，并且基于第一和第二参考区域中的参考磁道的跟踪误差来计算相对于位置传感器。该信息用于确定相对于该位置传感器的盘半径的跟踪误差分布。跟踪误差分布用于确定相对于来自相同位置传感器的信号的第三参考区域中的参考轨迹的跟踪误差。该跟踪误差用于相对于来自其它位置传感器的信号来确定第三参考区域中的其它参考轨道的跟踪误差。然后使用参考轨道的跟踪误差来确定盘上的数据轨迹的跟踪误差。本发明还提供一种具有自动寻道时间调整的盘驱动装置。基于设定的头部速度移动预定数量的轨迹。寻找时间与规定的寻道时间进行比较。如果两次不同，则调整速度直到达到规定的寻道时间。

5. 发明授权

US4543531A Digital data detecting apparatus 失效
标题翻译：数字数据检测装置
公开(公告)号：US4543531A
公开(公告)日：1985-09-24
申请号：US552118
申请日：1983-11-16
申请人： Junkichi Sugita , Hiroaki Yada
发明人： Junkichi Sugita , Hiroaki Yada
IPC分类号： G11B20/10 , H04L7/02 , H04L7/033 , H03D3/18
CPC分类号： G11B20/10 , G11B20/10009 , G11B20/10527 , H04L7/0334
摘要： A digital data detecting apparatus comprises means for sampling an input digital signal at a frequency which is M times (M>1) higher than a channel bit rate, means responsive to two adjacent sampled values for computing an interval from a point where the digital signal intersects a reference level to a sampling time, and means responsive to an output from the computing means for generating a data detecting signal for detecting data of the digital signal.
摘要翻译：数字数据检测装置包括用于以高于信道比特率M倍（M> 1）的频率对输入数字信号进行采样的装置，响应于两个相邻采样值，用于计算从数字信号将参考电平与采样时间相交，并且响应于来自计算装置的输出，用于产生用于检测数字信号的数据的数据检测信号。

6. 发明授权

US5175654A Disk apparatus 失效
标题翻译：磁盘设备
公开(公告)号：US5175654A
公开(公告)日：1992-12-29
申请号：US722129
申请日：1991-06-27
申请人： Takehiko Saito , Junkichi Sugita
发明人： Takehiko Saito , Junkichi Sugita
IPC分类号： G11B20/12 , G11B5/012 , G11B19/02 , G11B20/10 , G11B20/14
CPC分类号： G11B19/02 , G11B20/10 , G11B20/1403 , G11B5/012 , G11B20/1258
摘要： A disk apparatus of zone-recording type having a plurality of recording zones is structured such that a plurality of reference clock signals, each corresponding to a recording zone, are generated in both a recording mode and a reproducing mode. A reference frequency signal means, for generating an oscillating signal of a reference frequency, is combined with a variable frequency forming phase locked circuit. A first switch selectively causes the phase locked circuit to perform the phase locking in response to the reference frequency signal generated from the reference signal means or the reproducing signal. A demultiplying means switches a demultiplying ratio according to the mode.
摘要翻译：具有多个记录区域的区域记录类型的盘装置被构造成使得在记录模式和再现模式中都生成各自对应于记录区的多个参考时钟信号。用于产生参考频率的振荡信号的参考频率信号装置与可变频率形成锁相电路组合。第一开关选择性地使锁相电路响应于从参考信号装置或再现信号产生的参考频率信号执行相位锁定。不同方式根据模式切换不合理比例。

7. 发明申请

US20060274864A1 Frequency control device and information reproduction apparatus 失效
标题翻译：频率控制装置和信息再生装置
公开(公告)号：US20060274864A1
公开(公告)日：2006-12-07
申请号：US11439123
申请日：2006-05-24
申请人： Tomohiro Ohama , Junkichi Sugita , Nobuyuki Asai
发明人： Tomohiro Ohama , Junkichi Sugita , Nobuyuki Asai
IPC分类号： H04L27/06
CPC分类号： H04L7/04 , H03L7/093 , H04L2027/0016 , H04L2027/0095
摘要： A frequency control device capable of detecting a frame sync pattern and generating a frequency information accurately even if a reproduction signal is not zero-crossed, and an information reproduction apparatus having the same, which includes an oscillation circuit outputting a clock having a frequency corresponding to a control signal; a converter sampling an input analog signal having a predetermined pattern based on the clock and converting the same to a digital signal; and a frequency detection device detecting an object to be a sync pattern from a changing trend of the digital signal, generating a frequency information for controlling a reproduction clock based on the detected object to be the sync pattern, and outputting the same as the control signal to the oscillation circuit.
摘要翻译：一种频率控制装置，其能够检测帧同步码型，并且即使再现信号不是零交叉也能准确地产生频率信息，以及具有该频率控制装置的信息再现装置，包括：振荡电路，输出具有对应于控制信号; 转换器基于时钟对具有预定模式的输入模拟信号进行采样并将其转换为数字信号; 以及频率检测装置，根据数字信号的变化趋势来检测作为同步模式的对象，根据检测对象产生用于控制再生时钟的频率信息为同步模式，并将其输出为控制信号到振荡电路。

8. 发明授权

US5268803A Disc memory apparatus utilizing detection of high-accuracy address data in short servo sectors for high speed accessing 失效
标题翻译：利用在短伺服扇区中检测高精度地址数据进行高速存取的盘存储装置
公开(公告)号：US5268803A
公开(公告)日：1993-12-07
申请号：US825992
申请日：1992-01-27
申请人： Junkichi Sugita , Yoshiyuki Kunito
发明人： Junkichi Sugita , Yoshiyuki Kunito
IPC分类号： G11B27/10 , G11B5/012 , G11B5/55 , G11B21/02 , G11B7/095
CPC分类号： G11B5/5547 , G11B5/012
摘要： A disc memory apparatus allows its magnetic head to reach a target track in a short period of time, wherein address data is recorded on each two-track width corresponding to each of the even-numbered and the odd-numbered tracks; either of two kinds of burst signals is recorded on each one-track width corresponding to each of the even-numbered and the odd-numbered tracks; the address of the record track is detected, based on the result of a comparison of two kinds of burst signals and the first address data, or in addition to this, the detected address data is further offset by the second address data; since the lengths of the servo sector areas required to detect the address data are shortened, the address data of the magnetic head are detected to a higher accuracy using a smaller number of reference signals; and the magnetic head can be moved at a fast speed, thus in a short period of time, resulting in a short seek time.
摘要翻译：磁盘存储装置允许其磁头在短时间内到达目标磁道，其中地址数据被记录在对应于每个偶数和奇数磁道的每个双磁道宽度上; 两个突发信号中的任一种被记录在对应于每个偶数和奇数磁迹的每个单一磁道宽度上; 基于两种突发信号和第一地址数据的比较的结果，检测记录轨道的地址，或者除此之外，所检测的地址数据进一步被第二地址数据偏移; 由于缩短了检测地址数据所需的伺服扇区的长度，所以使用较少数量的参考信号来检测磁头的地址数据以更高的精度; 并且磁头可以以较快的速度移动，因此在短时间内移动，导致寻找时间短。

9. 发明授权

US4524401A Magnetic transducer head utilizing magneto resistance effect with a bias field and partial saturation 失效
标题翻译：磁传感器头利用具有偏置场和部分饱和的磁阻效应
公开(公告)号：US4524401A
公开(公告)日：1985-06-18
申请号：US333423
申请日：1981-12-22
申请人： Hiroyuki Uchida , Takehiro Nagaki , Shigeyoshi Imakoshi , Yutaka Soda , Junkichi Sugita , Tetsuo Sekiya
发明人： Hiroyuki Uchida , Takehiro Nagaki , Shigeyoshi Imakoshi , Yutaka Soda , Junkichi Sugita , Tetsuo Sekiya
IPC分类号： G11B5/39 , G11B5/30
CPC分类号： G11B5/3903
摘要： A magnetic transducer head utilizing a thin film magneto-resistance effect element is disclosed in which the amount of a DC bias magnetic field is so selected that only the end portion of the thin film magneto-resistance effect element serving as a contact surface with a magnetic medium is effectively given with sensitivity and the element is saturated in the vicinity of its central portion in its width direction.
摘要翻译：公开了一种利用薄膜磁阻效应元件的磁转换头，其中直流偏置磁场的量如此选择，使得只有薄膜磁阻效应元件的端部作为具有磁性的接触表面介质有效地被赋予灵敏度，元件在其中心部分的宽度方向附近饱和。

10. 发明授权

US4275269A Public address system 失效
标题翻译：公共地址系统
公开(公告)号：US4275269A
公开(公告)日：1981-06-23
申请号：US60036
申请日：1979-07-24
申请人： Junkichi Sugita , Yuzo Fuse
发明人： Junkichi Sugita , Yuzo Fuse
IPC分类号： H04B5/00 , H04B5/02 , H04R3/02 , H04R27/00
CPC分类号： H04B5/06 , H04B5/0006 , H04B5/02 , H04R27/00 , H04R3/02
摘要： A public address system having a microphone, an amplifier which amplifies the output from the microphone and a speaker assembly which receives the output from the amplifier and reproduces a sound, in which the microphone is provided with a transmitter generating an electromagnetic wave and the speaker assembly has two receiving coils disposed perpendicular to each other. The outputs from the receiving coils are used to control the level of an audio signal applied to the speaker assembly and thereby to avoid the occurrence of howling.
摘要翻译：具有麦克风的公共广播系统，放大麦克风的输出的放大器和接收来自放大器的输出并再现声音的扬声器组件，其中麦克风设置有产生电磁波的发射器，扬声器组件具有彼此垂直设置的两个接收线圈。来自接收线圈的输出用于控制施加到扬声器组件的音频信号的电平，从而避免发生啸叫。

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