公开(公告)号：US4939518A

公开(公告)日：1990-07-03

申请号：US248374

申请日：1988-09-23

申请人： Masao Hotta ,  Toshihiko Shimizu ,  Kenzi Maio ,  Yoshito Nejime

发明人： Masao Hotta ,  Toshihiko Shimizu ,  Kenzi Maio ,  Yoshito Nejime

IPC分类号： H03M1/12 ,  H03M1/20 ,  H03M1/36

CPC分类号： H03M1/206 ,  H03M1/1235 ,  H03M1/365

摘要： In a cyclic averaging analog to digital converter, reference voltages having a plurality of levels, each of which is inputted to one of a plurality of comparators in a flash type analog to digital converter, are shifted cyclically by a small voltage, and the outputs of the flash type analog to digital converter are added for every shift cycle in order to obtain an output digital signal. The outputs of a voltage dividing circuit provide the reference voltages with N levels, the levels differing cyclically by a small voltage. The N reference voltages are divided into groups, each of which consists of M elements N/M, switches are provided each of which selects one of the reference voltages one after another for an associated group N/M reference voltages are thus selected by these switches and are supplied to the comparators.

摘要翻译： 在循环平均模数转换器中，具有多个电平的参考电压，每个电平被输入到闪存类型模数转换器中的多个比较器中的一个，周期性地被小电压移位，并且输出 为每个移位周期添加闪存型模数转换器，以获得输出数字信号。 分压电路的输出为N个电平提供参考电压，该电平周期性地受到小电压的限制。 N个参考电压被分成组，每个组由M个元件N / M组成，提供开关，每个选择一个参考电压一个接一个地为相关联的组N / M参考电压由这些开关选择 并提供给比较器。

公开(公告)号：US4978957A

公开(公告)日：1990-12-18

申请号：US475799

申请日：1990-02-06

申请人： Masao Hotta ,  Toshihiko Shimizu ,  Yoshito Nejime

发明人： Masao Hotta ,  Toshihiko Shimizu ,  Yoshito Nejime

IPC分类号： H03M1/14 ,  H03M1/36

CPC分类号： H03M1/147 ,  H03M1/365

摘要： Disclosed is a parallel analog-to-digital converter in which a plurality of comparators are divided into a plurality of groups each consisting of a predetermined number of comparators, and outputs of at least these comparators belonging to the same group are added in an analog or digital fashion. Whether or not the result of addition of the outputs of the comparators exceeds a predetermined threshold level is decided in an analog or digital fashion so as to determine high-order and low-order bits of a digital output signal of the converter on the basis of the result of decision.

摘要翻译： 公开了一种并行模拟 - 数字转换器，其中多个比较器被分成多个组，每个组由预定数量的比较器组成，并且至少属于同一组的这些比较器的输出被添加到模拟或 数码时尚。 以模拟或数字的方式决定比较器的输出的相加结果是否超过预定阈值水平，以便基于以下方式确定转换器的数字输出信号的高阶和低位： 决定的结果。

公开(公告)号：US4875048A

公开(公告)日：1989-10-17

申请号：US237757

申请日：1988-08-29

申请人： Toshihiko Shimizu ,  Masao Hotta ,  Kenji Maio

发明人： Toshihiko Shimizu ,  Masao Hotta ,  Kenji Maio

IPC分类号： H03M1/14 ,  H03M1/00 ,  H03M1/10

CPC分类号： H03M1/10 ,  H03M1/16 ,  H03M1/361

摘要： In a two-step parallel analog to digital converter of the type in which a first flash-type A/D converter determines the upper significant bits of a digital signal output having a desired number of bits and after a quantizing error of the first flash-type A/D converter has been determined from the difference between a value obtained by reconverting the upper significant bits to an analog value and the input analog value a second flash-type A/D converter subjects the quantizing error to A/D conversion to determine a digital output of the remaining lower significant bits, a gain correcting circuit is additionally provided to automatically establish a gain of a D/A converter for reconverting the upper significant bits to an analog value on the basis of a reference voltage applied to the first flash-type A/D converter. Moreover, a reference voltage generating circuit is additionally provided to establish upper and lower reference voltages of a second flash-type A/D converter for determining lower significant bits on the basis of the step voltage of the DAC output.

摘要翻译： 在两级并行模数转换器中，其中第一闪存型A / D转换器确定具有所需位数的数字信号输出的高有效位，并且在第一闪存型A / D转换器的量化误差之后， 已经根据通过将高有效位重新转换为模拟值而获得的值与输入模拟值之间的差确定了A / D转换器，第二闪存型A / D转换器将量化误差对A / D转换进行测量，以确定 附加提供增益校正电路以自动建立D / A转换器的增益，用于根据施加到第一闪存的参考电压将高有效位重新转换为模拟值 型A / D转换器。 此外，另外提供参考电压产生电路以建立第二闪存型A / D转换器的上限和下限参考电压，用于基于DAC输出的阶跃电压来确定较低有效位。

公开(公告)号：US4752766A

公开(公告)日：1988-06-21

申请号：US15017

申请日：1987-02-17

申请人： Toshihiko Shimizu ,  Masao Hotta ,  Kenji Maio

发明人： Toshihiko Shimizu ,  Masao Hotta ,  Kenji Maio

IPC分类号： H03M1/36 ,  H03M1/00 ,  H03M1/06

CPC分类号： H03M1/361

摘要： In an analog-to-digital converter of a parallel comparison type having a plurality of comparators for comparing an analog input voltage with different reference voltages and converting a comparison result into a digital output by means of an encoder, a plurality of comparators each having a different input dynamic range are used to widen the analog input voltage range up to the power source range of positive and negative voltages.

摘要翻译： 在具有用于将模拟输入电压与不同参考电压进行比较的多个比较器并且通过编码器将比较结果转换成数字输出的并行比较类型的模拟 - 数字转换器中，每个具有 不同的输入动态范围用于将模拟输入电压范围扩大到正，负电压的电源范围。

公开(公告)号：US4851845A

公开(公告)日：1989-07-25

申请号：US185264

申请日：1988-04-18

申请人： Masao Hotta ,  Kenji Maio ,  Toshihiko Shimizu

发明人： Masao Hotta ,  Kenji Maio ,  Toshihiko Shimizu

IPC分类号： H03M7/00 ,  H03M1/00

CPC分类号： H03M1/361

摘要： A parallel (flashed) type analog-to-digital converter is provided which is fabricated on a single integrated-circuit chip. An input analog voltage is compared with respective reference voltages by a number of comparators. A change position of an output pattern (for example, a thermometer format signal) of the comparators is detected by a number of exclusive OR circuits. The exclusive OR circuits are grouped into several groups, and in each group, the output transistors of respective exclusive OR circuits are connected to separate bit lines. Several sets of separate bit lines are connected to one set of output bit lines through emitter followers or diodes so that parasitic capacitances related to the output transistors are reduced.

摘要翻译： 提供了一个并联（闪存）型模数转换器，其被制造在单个集成电路芯片上。 通过多个比较器将输入模拟电压与相应的参考电压进行比较。 比较器的输出图案的变化位置（例如，温度计格式信号）由多个异或电路检测。 异或电路分为几组，每组中各异或电路的输出晶体管连接到分开的位线。 几组单独的位线通过发射极跟随器或二极管连接到一组输出位线，从而减小与输出晶体管相关的寄生电容。

公开(公告)号：US5113077A

公开(公告)日：1992-05-12

申请号：US588718

申请日：1990-09-27

申请人： Toshihiko Shimizu ,  Masao Hotta ,  Atsushi Moritani

发明人： Toshihiko Shimizu ,  Masao Hotta ,  Atsushi Moritani

IPC分类号： A61B6/03 ,  G01T1/17 ,  G01T1/20 ,  G01T1/29

CPC分类号： G01T1/17 ,  G01T1/2985

摘要： A radiation detection circuit integrates output currents of a plurality of X-ray CT scanner radiation detectors, which are combinations of scintillators and photodiodes, during a short period to convert them to charge information in order to collect data for reproducing a tomogram. A current amplifier is connected to the output terminal of the photo-diode, and an output current of the current amplifier is charged in an integration capacitor. In this manner, the radiation detection circuit enables reduction of the measurement period.

摘要翻译： 辐射检测电路在短时间内将作为闪烁体和光电二极管的组合的多个X射线CT扫描仪辐射检测器的输出电流进行积分，以将其转换为电荷信息，以便收集用于再现断层图像的数据。 电流放大器连接到光电二极管的输出端，并且电流放大器的输出电流在积分电容器中充电。 以这种方式，辐射检测电路能够减少测量周期。

公开(公告)号：US4916653A

公开(公告)日：1990-04-10

申请号：US235528

申请日：1988-08-24

申请人： Toshihiko Shimizu ,  Masao Hotta

发明人： Toshihiko Shimizu ,  Masao Hotta

IPC分类号： G06G7/14 ,  G06F7/50 ,  G06F7/501 ,  G06F7/503 ,  G06F7/506 ,  G06J1/00

CPC分类号： G06F7/5013

摘要： A binary digital full adder as a component element of a digital circuit receives three binary signals including two input signals and a carry-in from the lower digit. The adder comprises a four-state logic converter for adding together the three binary signals in terms of current addition to convert the sum into a four-state logic signal, and an encoder for deciding a four-state logic level to encode it into a binary sum and a carry-out.

摘要翻译： 作为数字电路的元件的二进制数字全加器接收包括两个输入信号的三个二进制信号和来自较低数字的进位输入。 加法器包括四状态逻辑转换器，用于将电流相加的三个二进制信号相加在一起，以将和转换成四态逻辑信号;以及编码器，用于确定四态逻辑电平以将其编码为二进制 总和和进行。

公开(公告)号：US08537500B2

公开(公告)日：2013-09-17

申请号：US12981254

申请日：2010-12-29

申请人： Teruhiro Nakamiya ,  Keiko Watanabe ,  Toshihiko Shimizu ,  Noritaka Ootake ,  Takeji Sumiya ,  Takashi Tomita ,  Takahisa Okada

发明人： Teruhiro Nakamiya ,  Keiko Watanabe ,  Toshihiko Shimizu ,  Noritaka Ootake ,  Takeji Sumiya ,  Takashi Tomita ,  Takahisa Okada

IPC分类号： G11B5/48 ,  G11B21/21

CPC分类号： G11B5/5573 ,  G11B5/4833

摘要： A magnetic disk device including a disk, a spindle motor, a base for supporting the spindle motor and the disk, a slider includes a head element. The device also includes an actuator including arms for supporting the slider and a coil of a voice coil motor for rotating the arms, wherein a first natural bending frequency of the coil is less than a first natural bending frequency of the arms.

摘要翻译： 一种磁盘装置，包括盘，主轴电机，用于支撑主轴电机和盘的底座，滑块包括头元件。 该装置还包括具有用于支撑滑动件的臂和用于旋转臂的音圈电机的线圈的致动器，其中线圈的第一自然弯曲频率小于臂的第一自然弯曲频率。

公开(公告)号：US07525759B2

公开(公告)日：2009-04-28

申请号：US11222566

申请日：2005-09-09

申请人： Takehiko Eguchi ,  Masayuki Kurita ,  Toshihiko Shimizu ,  Mikio Tokuyama

发明人： Takehiko Eguchi ,  Masayuki Kurita ,  Toshihiko Shimizu ,  Mikio Tokuyama

IPC分类号： G11B5/39

CPC分类号： G11B33/1493

摘要： Embodiments of the invention provide a magnetic disk device which improves the shielding function for the magnetic heads while maintaining a form factor having an inexpensive constitution. In one embodiment, a magnetic disk device comprises a rotary disk-type magnetic disk; a magnetic head for recording or reproducing information; a magnetic head support mechanism for supporting the magnetic head; a shroud having an opening in which the magnetic head support mechanism is inserted, and surrounding the outer circumference of the magnetic disk; and a housing. The housing includes a base and a cover, and accommodates the magnetic disk, the magnetic head, the magnetic head support mechanism and the shroud. The base is constituted by using a nonmagnetic material and the shroud is constituted by using a magnetic material.

摘要翻译： 本发明的实施例提供了一种磁盘装置，其在保持具有便宜构造的形状因素的同时提高了磁头的屏蔽功能。 在一个实施例中，磁盘装置包括旋转盘式磁盘; 用于记录或再现信息的磁头; 用于支撑磁头的磁头支撑机构; 具有开口的护罩，其中磁头支撑机构插入其中，并围绕磁盘的外周; 和住房。 壳体包括基座和盖，并且容纳磁盘，磁头，磁头支撑机构和护罩。 底座由使用非磁性材料构成，护罩由磁性材料构成。

公开(公告)号：US20080112299A1

公开(公告)日：2008-05-15

申请号：US11985123

申请日：2007-11-13

申请人： Toshihiko Shimizu ,  Keiko Watanabe

发明人： Toshihiko Shimizu ,  Keiko Watanabe

IPC分类号： G11B33/02

CPC分类号： G11B33/1466 ,  G11B33/1433

摘要： Embodiments of present invention help to realize a highly reliable magnetic disk drive by preventing a positional displacement between a magnetic head and a target track by decreasing restricting forces that a cover exerts on a base when the temperature is increased. According to one embodiment, a base is formed by aluminum die casting, has a concave, rectangular parallelepiped shape, and is formed with step portions at the four corners. A cover is a flat plate of stainless steel or iron. Four corner portions of the cover are bent to form step portions. The cover is fixed to the base at the four corners with bolts at two side positions (six positions in total). A gasket is inserted at that time to enhance the sealing performance. Since the gasket is a member like a rubber packing, it is necessary to press the gasket with the flat portions of the base and the cover To this end, the gasket is placed on top of the base step portions and the connection between the cover and the base at the four corners is made under the base step portions.

摘要翻译： 本发明的实施例有助于通过在温度升高时通过减小盖施加在基座上的限制力来防止磁头和目标轨道之间的位置偏移来实现高度可靠的磁盘驱动。 根据一个实施例，基座由铝压铸形成，具有凹形的长方体形状，并且在四个角部形成有台阶部分。 盖是不锈钢或铁的平板。 盖的四个角部弯曲以形成台阶部。 盖子通过两个侧面位置的螺栓（总共六个位置）固定在四个角落的基座上。 此时插入垫圈以增强密封性能。 由于垫圈是像橡胶垫片的构件，因此需要用基座和盖子的平坦部分按压垫圈。为此，垫圈被放置在基座台阶部分的顶部，盖子和 在四个角落处的基部形成在基底台阶部下方。