公开(公告)号：US5970026A

公开(公告)日：1999-10-19

申请号：US79362

申请日：1993-06-17

申请人： Shigeaki Wachi ,  Tetsuji Kawashima

发明人： Shigeaki Wachi ,  Tetsuji Kawashima

IPC分类号： G11B11/10 ,  G11B5/00 ,  G11B5/02 ,  G11B11/105 ,  G11B11/12 ,  G11B13/04

CPC分类号： G11B11/10508 ,  G11B11/10595 ,  G11B2005/001

摘要： A magnetic modulator coil driving circuit comprises: first and second switching elements for inverting the polarity of exciting currents supplied to magnetic modulator coils, first and second bias voltage setting circuit for determining control voltages to be applied to the first and second switching elements to adjust the currents flowing through the first and second switching elements to a predetermined value, and a data input circuit for supplying modulating data to turn on and off the first and second switching elements alternately. The magnetic modulator coil driving circuit applies a control voltage to the control electrode of the corresponding switching element to control the exciting current to be supplied through the switching element to the corresponding magnetic modulator coil so that the exciting current coincides with a desired value when a reference voltage is applied to the control electrode. Thus a fixed exciting current is supplied to the magnetic modulator coil so that the intensity of the magnetic field may not vary due to temperature variation in the magnetic modulator coil and the magnetic modulator coil may not overheat or burn.

摘要翻译： 磁调制器线圈驱动电路包括：第一和第二开关元件，用于反转提供给磁调制器线圈的励磁电流的极性;第一和第二偏置电压设置电路，用于确定要施加到第一和第二开关元件的控制电压， 流过第一和第二开关元件的电流达到预定值;以及数据输入电路，用于提供调制数据以交替地接通和关断第一和第二开关元件。 磁调制器线圈驱动电路向对应的开关元件的控制电极施加控制电压，以将通过开关元件提供的励磁电流控制到相应的磁调制器线圈，使得当参考电压时激励电流与期望值一致 电压被施加到控制电极。 因此，固定的励磁电流被提供给磁调制器线圈，使得磁场的强度可能不会由于磁调制器线圈的温度变化而变化，并且磁调制器线圈可能不会过热或烧坏。

公开(公告)号：US07828620B2

公开(公告)日：2010-11-09

申请号：US10541936

申请日：2004-01-08

申请人： Dharam Pal Gosain ,  Hisashi Kajiura ,  Ryuichiro Maruyama ,  Masashi Shiraishi ,  Houjin Huang ,  Koji Kadono ,  Shigeaki Wachi ,  Masafumi Ata

发明人： Dharam Pal Gosain ,  Hisashi Kajiura ,  Ryuichiro Maruyama ,  Masashi Shiraishi ,  Houjin Huang ,  Koji Kadono ,  Shigeaki Wachi ,  Masafumi Ata

IPC分类号： H01J9/00

CPC分类号： B82Y30/00 ,  B82Y10/00 ,  B82Y40/00 ,  C01B32/162 ,  H01J1/304 ,  H01J9/025 ,  H01J2201/30469 ,  H01J2329/00

摘要： A method of manufacturing a tubular carbon molecule capable of regularly aligning a carbon nanotube with a finer spacing is provided. A catalyst is arranged on a material substrate (10) made of a semiconductor such as silicon (Si) and including iron (Fe) as a catalyst through the use of melting according to a modulated heat distribution (11). The heat distribution (11) is formed, for example, through diffracting an energy beam (12) by a diffraction grating (13). As a method of arranging the catalyst, for example, iron may be deposited in a planar shape or a projection shape in a position corresponding to the heat distribution (11), or the deposited iron may be used as a master to be transferred to another substrate. A carbon nanotube is grown through the use of the arranged catalyst. The grown carbon nanotube can be used as a recording apparatus, a field electron emission device, an FED or the like.

摘要翻译： 提供了一种制造能够以更细的间隔规则地对准碳纳米管的管状碳分子的方法。 通过使用根据调制的热分布（11）的熔化，将催化剂布置在由诸如硅（Si）的半导体和包括铁（Fe））作为催化剂的材料基板（10）上。 热分布（11）例如通过衍射光栅（13）衍射能量束（12）而形成。 作为布置催化剂的方法，例如，铁可以在对应于热分布（11）的位置中以平面形状或突起形状沉积，或者沉积的铁可以用作主转移到另一个 基质。 通过使用所配置的催化剂生长碳纳米管。 生长的碳纳米管可以用作记录装置，场电子发射装置，FED等。

公开(公告)号：US5537374A

公开(公告)日：1996-07-16

申请号：US416070

申请日：1995-04-04

申请人： Shigeaki Wachi

发明人： Shigeaki Wachi

IPC分类号： G11B7/007 ,  G11B7/085 ,  G11B7/09 ,  G11B7/095 ,  G11B7/24 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B11/10578 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/094 ,  G11B7/24

摘要： An optical recording medium on which a data signal is formed comprises an area A of recording tracks for recording a data signal between pairs of grooves Gr and a d.c. offset cancel area B for canceling d.c. offset by the push-pull system, which serves as a predetermined area. In the d.c. offset cancel area B, no grove Gr is formed, and grooves are formed at the recording track center positions Tc. The groove at the recording track center position Tc is caused to have the same width and depth as those of the groove Gr. In carrying out recording/reproduction of a data signal by using this optical recording medium, a return light from the optical recording medium is detected by a bisected detector. A difference signal between outputs from the detector is determined by an amplifier. In accordance with an output signal of a sample-hold signal supply unit, first and second sample-hold units respectively hold signals having output phases different from each other by 180 degrees. An adder adds these signals to take out only a d.c. fluctuation component to eliminate the d.c. fluctuation component superimposed on a tracking error signal at a d.c. offset eliminating unit.

摘要翻译： 其上形成有数据信号的光记录介质包括记录轨道的区域A，用于在成对的槽Gr和d.c.之间记录数据信号。 偏移取消区域B用于取消直流。 由作为预定区域的推挽系统偏移。 在d.c. 偏移抵消区域B，没有形成格子Gr，并且在记录轨道中心位置Tc处形成凹槽。 使记录轨道中心位置Tc处的槽具有与槽Gr相同的宽度和深度。 通过使用该光学记录介质进行数据信号的记录/再现，来自光记录介质的返回光由二等分检测器检测。 来自检测器的输出之间的差分信号由放大器确定。 根据采样保持信号供给单元的输出信号，第一采样保持单元和第二采样保持单元分别保持输出相位彼此相差180度的信号。 一个加法器加上这些信号，只取出一个直流电 波动成分消除直流。 波动分量叠加在跟踪误差信号上。 偏移消除单元。

公开(公告)号：US5471447A

公开(公告)日：1995-11-28

申请号：US744966

申请日：1991-08-14

申请人： Shigeaki Wachi

发明人： Shigeaki Wachi

IPC分类号： G11B21/08 ,  G05D3/12 ,  G11B7/085 ,  G11B21/10 ,  G11B7/00 ,  G11B5/596

CPC分类号： G11B7/08529 ,  G11B21/106

摘要： An optical pickup is controlled to move to a target track on an optical information storage disc based on target value information representing the sum of speed information indicative of a speed at which the optical pickup is to move, and distance information indicative of a distance which the optical pickup has moved toward the target track. A first subtractor produces a differential signal indicative of the difference between the target value information and remaining distance information which represents a remaining distance that the optical pickup is to move. The differential signal is supplied to a second subtractor which determines the difference between the differential signal and actual speed information indicating an actual speed at which the optical pick is moving. The second subtractor produces a differential signal which is supplied to an actuator to move the optical head.

摘要翻译： 控制光拾取器基于表示表示光拾取器要移动的速度的速度信息的总和的目标值信息以及指示距离的距离信息指示光信息存储盘上的目标轨迹 光学拾取器朝向目标轨道移动。 第一减法器产生指示目标值信息与表示光学拾取器要移动的剩余距离的剩余距离信息之间的差异的差分信号。 差分信号被提供给第二减法器，该第二减法器确定差分信号与指示光拾取器移动的实际速度的实际速度信息之间的差。 第二减法器产生差分信号，该差分信号被提供给致动器以移动光学头。

公开(公告)号：US4135237A

公开(公告)日：1979-01-16

申请号：US846055

申请日：1977-10-27

申请人： Tadao Suzuki ,  Shigeaki Wachi

发明人： Tadao Suzuki ,  Shigeaki Wachi

IPC分类号： H02M7/5383 ,  H02M7/537

CPC分类号： H02M7/5383

摘要： An inverter includes a pair of switching elements operated by control signals from a signal generator to take two-position action in the same phase or in opposite phases, and a coupling transformer to couple the control signals so that ON actions or ON and OFF actions of the switching elements are synchronized with each other more precisely than circuits of the past have been able to provide.

摘要翻译： 逆变器包括由来自信号发生器的控制信号操作的一对开关元件，以相同相位或相反相位进行两位置动作;以及耦合变压器，用于耦合控制信号，使得ON动作或ON和OFF动作 开关元件比过去能够提供的电路更准确地彼此同步。

公开(公告)号：US5224086A

公开(公告)日：1993-06-29

申请号：US728162

申请日：1991-07-10

申请人： Shigeaki Wachi

发明人： Shigeaki Wachi

IPC分类号： G11B11/105 ,  G11B19/20 ,  G11B19/28

CPC分类号： G11B11/10595 ,  G11B19/28

摘要： A spindle servo system for a magneto-optical recording/playback apparatus, comprising a PLL circuit lockable in phase by sample servo pits formed on a track of a magneto-optical disc; a phase comparator for comparing the phase of a signal, whose period corresponds to the output of the PLL circuit, with the phase of a reference frequency signal; and a resonator having a reference frequency conforming to the eccentricity cycle of the disc. In this servo system, the rotation period of a spindle motor for driving the disc is controlled in accordance with the output of the phase comparator and the output of the resonator. The PLL circuit includes a voltage-controlled crystal oscillator, and the resonator is excited in conformity to the output of the phase comparator to control the rotation frequency of the spindle motor, thereby reducing the jitter component included in the output of the PLL circuit.

摘要翻译： 一种用于磁光记录/重放装置的主轴伺服系统，包括可由形成在磁光盘的轨道上的样品伺服凹坑相位锁定的PLL电路; 相位比较器，用于将其周期对应于PLL电路的输出的信号的相位与参考频率信号的相位进行比较; 以及具有符合盘的偏心循环的参考频率的谐振器。 在该伺服系统中，根据相位比较器的输出和谐振器的输出来控制用于驱动盘的主轴电动机的旋转周期。 PLL电路包括压控晶体振荡器，并且根据相位比较器的输出激励谐振器以控制主轴电动机的旋转频率，从而减少包括在PLL电路的输出中的抖动分量。

公开(公告)号：US5168484A

公开(公告)日：1992-12-01

申请号：US704124

申请日：1991-05-22

申请人： Shigeaki Wachi ,  Hideki Inoue

发明人： Shigeaki Wachi ,  Hideki Inoue

IPC分类号： G11B11/10 ,  G11B11/105

CPC分类号： G11B11/10556 ,  G11B11/10595

摘要： A head protection control for a magneto-optical recording/reproducing device, including an elastic arm for mounting a magnetic head at one end portion of the arm and biasing the magnetic head in a direction contacting a surface of a magneto-optical disk, which elastic arm is movable in a radial direction of the magneto-optical disk; a driver for driving the elastic arm in a direction moving away from the surface of the magneto-optical disk; a phase-locked loop (PLL) for generating a lock signal when the PLL circuit becomes synchronous with a clock signal in a reproduced signal from the magneto-optical disk; and a controller for controlling the driver so as to cause the driver, upon receipt of the lock signal, to lower the magnetic head to face the magneto-optical disk during rotation at the predetermined speed with a fine gap defined between the magnetic head and the magneto-optical disk by a flying force due to an air stream. It is accordingly possible to prevent damage of the magnetic head or the disk surface even when the magnetic head sticks to the disk surface.

摘要翻译： 一种用于磁光记录/再现装置的头部保护控制装置，包括用于在臂的一个端部处安装磁头的弹性臂，并使磁头沿与磁光盘表面接触的方向偏置，弹性臂 臂可以在磁光盘的径向方向上移动; 用于沿着远离磁光盘表面的方向驱动弹性臂的驱动器; 锁相环（PLL），用于当PLL电路与来自磁光盘的再现信号中的时钟信号同步时产生锁定信号; 以及控制器，用于控制驱动器，以便在接收到锁定信号时使驱动器以预定速度旋转期间降低磁头以面对磁光盘，并且在磁头和 磁光盘由于空气流而产生飞行力。 因此，即使当磁头粘附到盘表面时，也可以防止磁头或盘表面的损坏。

公开(公告)号：US5138595A

公开(公告)日：1992-08-11

申请号：US455159

申请日：1989-12-22

申请人： Shigeaki Wachi

发明人： Shigeaki Wachi

IPC分类号： G11B7/095 ,  G11B7/09

CPC分类号： G11B7/0941

摘要： An automatic servo gain control system for an optical disk player apparatus is capable of controlling an open-loop servo gain to be constant, regardless of parameter variations including variations in the optical head actuator gain. The system includes a gain control circuit that varies a gain for a first signal indicative of a positional relationship between the optical head and an optical disk based on a second signal providing light intensity information. The system further includes an oscillator that produces an output at a frequency within a servo frequency band of the optical head actuator and that is introduced into a servo loop via an operational amplifier. Signal values at an input side and an output side of the operational amplifier in the servo loop are compared so as to vary the gain for the first signal based on a difference between the input and output signal values. The system operates to control the input and output signal values to be at a predetermined rate, thereby keeping the open-loop servo gain constant.

公开(公告)号：US5121016A

公开(公告)日：1992-06-09

申请号：US709702

申请日：1991-06-03

申请人： Shigeaki Wachi

发明人： Shigeaki Wachi

IPC分类号： G11B21/08 ,  G11B7/085 ,  H02K7/20 ,  H02K33/18 ,  H02K41/035

CPC分类号： H02K41/0356 ,  G11B7/08529 ,  G11B7/08582 ,  H02K7/20

摘要： A linear motor comprising first and second magnetic members with first and second magnets secured to and cooperating respectively with the first and second magnetic members to form first and second magnetic circuits each having a magnetic gap formed therein, first and second driving coils mounted for integral movement with each other along the magnetic gaps and each including a driving coil winding wound in such a manner as to partially extend perpendicularly across a magnetic field produced in the magnetic gap by the first or second magnet and a velocity detecting coil winding wound in an overlapping relationship with the driving coil winding, the velocity detecting coil windings of the first and second driving coils being wound and connected to each other such that voltages induced in the velocity detecting coil windings of the first and second driving coils by external magnetic fields from a common magnetic field other than the magnetic fields produced by the first and second magnets are cancelled by each other, but voltages induced by the internal magnetic fields produced by the first and second magnets are added to each other.

摘要翻译： 一种线性电动机，包括具有第一和第二磁体的第一和第二磁性构件，其中第一和第二磁体分别固定到第一和第二磁性构件并与第一和第二磁性构件配合，以形成第一和第二磁路，每个具有形成在其中的磁隙;第一和第二驱动线圈， 沿着磁隙彼此分开，并且每个包括驱动线圈绕组，所述驱动线圈绕组以这样一种方式卷绕，以便部分地垂直地穿过第一或第二磁体在磁隙中产生的磁场和以重叠关系缠绕的速度检测线圈绕组 利用驱动线圈绕组，第一和第二驱动线圈的速度检测线圈绕组彼此缠绕并连接，使得通过来自公共磁场的外部磁场在第一和第二驱动线圈的速度检测线圈绕组中感应的电压 场，而不是由第一和第二磁体产生的磁场 s被彼此取消，但是由第一和第二磁体产生的内部磁场感应的电压彼此相加。

公开(公告)号：US5003523A

公开(公告)日：1991-03-26

申请号：US171256

申请日：1988-03-21

申请人： Shigeaki Wachi ,  Eiji Kumagai

发明人： Shigeaki Wachi ,  Eiji Kumagai

IPC分类号： G11B7/085

CPC分类号： G11B7/08511

摘要： An optical disk recording and reproducing appartus is provided with a signal processing circuit in a focus servo circuit for suppressing a traverse signal which has a frequency determined by the pitch of pre-grooves and the transversely shifting speed of a laser beam spot and which modulates a focus error signal during a search mode operation. This signal processing circuit successfully avoids an influence of the traverse signal focus servo system and thus assures accurate focus on the control.