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1. 发明授权

US06867936B2 Driving circuit for a magnetic head and magnetic recording apparatus 失效
标题翻译：用于磁头和磁记录装置的驱动电路
公开(公告)号：US06867936B2
公开(公告)日：2005-03-15
申请号：US09941867
申请日：2001-08-30
申请人： Yasuyuki Ookuma , Kenji Maio , Yoichiro Kobayashi , Hiroyasu Yoshizawa
发明人： Yasuyuki Ookuma , Kenji Maio , Yoichiro Kobayashi , Hiroyasu Yoshizawa
IPC分类号： G11B5/09 , G11B5/00 , G11B5/012 , G11B5/02
CPC分类号： G11B5/02 , G11B5/012 , G11B2005/0013
摘要： A magnetic head driving circuit includes a main driving circuit symmetrical with respect to a centered recording coil, and at least two pairs of adding circuits, each pair including a positive pulse adding circuit and a negative pulse superposed circuit symmetrical with respect to the centered coil. And, by reversing the direction of the magnetic head coil current, at least one of the adding circuits is made to operate and make it as a magnetic head driving circuit for adding a potential equal to or higher than the power supply, thereby to drive as a sub-driving circuit arranged symmetrically with respect to the centered coil, which promotes the reversal of the magnetic head coil current, and which drives stably with a central potential of the coil at about the disk potential.
摘要翻译：磁头驱动电路包括相对于中心记录线圈对称的主驱动电路和至少两对加法电路，每对加法电路包括相对于中心线圈对称的正脉冲加法电路和负脉冲叠加电路。并且，通过使磁头线圈电流的方向反转，使加法电路中的至少一个进行工作，并将其作为用于增加等于或高于电源的电位的磁头驱动电路，从而作为子驱动电路相对于中心线圈对称地布置，其促进磁头线圈电流的反转，并且以围绕盘电位的线圈的中心电位稳定地驱动。

2. 发明申请

US20050128619A1 Driving circuit for a magnetic head and magnetic recording apparatus 审中-公开
公开(公告)号：US20050128619A1
公开(公告)日：2005-06-16
申请号：US11049704
申请日：2005-02-04
申请人： Yasuyuki Ookuma , Kenji Maio , Yoichiro Kobayashi , Hiroyasu Yoshizawa
发明人： Yasuyuki Ookuma , Kenji Maio , Yoichiro Kobayashi , Hiroyasu Yoshizawa
IPC分类号： G11B5/09 , G11B5/00 , G11B5/012 , G11B5/02 , G11B5/03 , G11B5/147
CPC分类号： G11B5/02 , G11B5/012 , G11B2005/0013
摘要： A magnetic head driving circuit includes a main driving circuit symmetrical with respect to a centered recording coil, and at least two pairs of adding circuits, each pair including a positive pulse adding circuit and a negative pulse superposed circuit symmetrical with respect to the centered coil. And, by reversing the direction of the magnetic head coil current, at least one of the adding circuits is made to operate and make it as a magnetic head driving circuit for adding a potential equal to or higher than the power supply, thereby to drive as a sub-driving circuit arranged symmetrically with respect to the centered coil, which promotes the reversal of the magnetic head coil current, and which drives stably with a central potential of the coil at about the disk potential.

3. 发明申请

US20050180041A1 Disk storage systems 失效
标题翻译：磁盘存储系统
公开(公告)号：US20050180041A1
公开(公告)日：2005-08-18
申请号：US11033258
申请日：2005-01-12
申请人： Shinya Kajiyama , Hiroyasu Yoshizawa , Yoichiro Kobayashi , Ichiro Somada
发明人： Shinya Kajiyama , Hiroyasu Yoshizawa , Yoichiro Kobayashi , Ichiro Somada
IPC分类号： G11B5/02 , G11B5/09 , H01L43/08
CPC分类号： G11B5/09 , G11B5/012
摘要： The present invention provides a disk storage system with a low error rate, which is suitable for reduction in size. The other end of the signal line, which is connected with a read head at one end, is connected with a head bias circuit to apply a sense current to the read head and a pair of first and second capacitance elements for allowing the read signal element formed by the read head to pass, a loop is provided for amplifying the read signal obtained through the first and second capacitance elements by supplying the read signal to an input terminal of a differential amplifying circuit and for converting the amplified signal into the current by transconductance and providing a positive feedback of the amplified signal to the input terminal of the differential amplifying circuit.
摘要翻译：本发明提供一种低误码率的盘存储系统，适合于减小尺寸。在一端与读头连接的信号线的另一端与头偏置电路连接，以将读出电流施加到读取头和一对第一和第二电容元件，以允许读取信号元件由读头通过，提供一个环路，用于通过将读信号提供给差分放大电路的输入端来放大通过第一和第二电容元件获得的读信号，并将放大的信号转换成电流通过跨导并将放大信号的正反馈提供给差分放大电路的输入端。

4. 发明授权

US07239467B2 Storage media reading writing system 失效
标题翻译：存储介质读写系统
公开(公告)号：US07239467B2
公开(公告)日：2007-07-03
申请号：US10834194
申请日：2004-04-29
申请人： Hiroyasu Yoshizawa , Yoichiro Kobayashi , Toshio Shinomiya , Noriyuki Fujii , Masaki Yoshinaga
发明人： Hiroyasu Yoshizawa , Yoichiro Kobayashi , Toshio Shinomiya , Noriyuki Fujii , Masaki Yoshinaga
IPC分类号： G11B5/02 , G11B5/48
CPC分类号： G11B5/035 , G11B5/012 , G11B5/02 , G11B5/4833 , G11B5/484 , G11B33/121 , G11B33/122
摘要： The storage media recording/writing system includes a media drive circuit, a head retaining means, a head moving means, a head drive circuit, a signal processing circuit, and a controller to control these. The head drive circuit possesses a first semiconductor integrated circuit having an amplifier that amplifies the read signal from the head, and a second semiconductor integrated circuit placed between the first semiconductor integrated circuit and the signal processing circuit, which has a circuit that receives write data from the signal processing circuit and generates a drive signal to drive a write head. Further, the first semiconductor integrated circuit is mounted on a part near the front of the head retaining means, and the second semiconductor integrated circuit is installed on the side of the moving means.
摘要翻译：存储介质记录/写入系统包括介质驱动电路，磁头保持装置，磁头移动装置，磁头驱动电路，信号处理电路和控制器。头驱动电路具有第一半导体集成电路，其具有放大器，用于放大来自头部的读取信号的放大器，以及放置在第一半导体集成电路和信号处理电路之间的第二半导体集成电路，该电路具有接收来自信号处理电路，并产生驱动写入头的驱动信号。此外，第一半导体集成电路安装在靠近头保持装置的前部的部分上，并且第二半导体集成电路安装在移动装置的一侧。

5. 发明申请

US20070121237A1 Read circuit and hard disk drive using the same 审中-公开
标题翻译：读取电路和硬盘驱动器使用相同
公开(公告)号：US20070121237A1
公开(公告)日：2007-05-31
申请号：US11604849
申请日：2006-11-28
申请人： Hiroyasu Yoshizawa , Yoichiro Kobayashi , Toshio Shinomiya
发明人： Hiroyasu Yoshizawa , Yoichiro Kobayashi , Toshio Shinomiya
IPC分类号： G11B5/03
CPC分类号： G11B5/02 , G11B2005/0018
摘要： A magnetic disk apparatus-purpose reproducing circuit capable of performing a high speed and under stable condition. In the magnetic disk apparatus-purpose reproducing circuit equipped with: a bias circuit for applying a bias voltage with respect to an MR (Magneto-Resistive) head, an amplification circuit for amplifying an output of the MR head, capacitors C0 and C1 for cutting a DC component contained in the output of the MR head, and a conductor amplifier for applying an input bias of the amplifier, a shortcircuit-purpose switch S0 for charging the DC cut capacitors are further provided. When a mode transition from a write mode to a read mode occurs, the shortcircuit-purpose switch S0 is turned ON so as to charge the DC cut capacitors, so that a mode transition characteristic capable of establishing a high speed characteristic and a stable characteristic can be obtained.
摘要翻译：一种能够执行高速和稳定状态的磁盘装置用再现电路。在配备有用于对MR（磁电阻）磁头施加偏置电压的偏置电路的磁盘装置用再现电路中，放大用于放大MR磁头的输出的放大电路，电容器C 0和C 1 为了切割包含在MR磁头的输出端的DC分量，以及用于施加放大器的输入偏置的导体放大器，还提供用于对DC切断电容器充电的短路用开关S 0。当从写入模式转换到读取模式时，短路用开关S 0导通，以对直流切断电容器充电，使得能够建立高速特性和稳定特性的模式转变特性可以获得。

6. 发明授权

US07082004B2 Disk storage systems 失效
标题翻译：磁盘存储系统
公开(公告)号：US07082004B2
公开(公告)日：2006-07-25
申请号：US11033258
申请日：2005-01-12
申请人： Shinya Kajiyama , Hiroyasu Yoshizawa , Yoichiro Kobayashi , Ichiro Somada
发明人： Shinya Kajiyama , Hiroyasu Yoshizawa , Yoichiro Kobayashi , Ichiro Somada
IPC分类号： G11B5/09
CPC分类号： G11B5/09 , G11B5/012
摘要： The present invention provides a disk storage system with a low error rate, which is suitable for reduction in size. The other end of the signal line, which is connected with a read head at one end, is connected with a head bias circuit to apply a sense current to the read head and a pair of first and second capacitance elements for allowing the read signal element formed by the read head to pass, a loop is provided for amplifying the read signal obtained through the first and second capacitance elements by supplying the read signal to an input terminal of a differential amplifying circuit and for converting the amplified signal into the current by transconductance and providing a positive feedback of the amplified signal to the input terminal of the differential amplifying circuit.
摘要翻译：本发明提供一种低误码率的盘存储系统，适合于减小尺寸。在一端与读头连接的信号线的另一端与头偏置电路连接，以将读出电流施加到读取头和一对第一和第二电容元件，以允许读取信号元件由读头通过，提供一个环路，用于通过将读信号提供给差分放大电路的输入端来放大通过第一和第二电容元件获得的读信号，并将放大的信号转换成电流通过跨导并将放大信号的正反馈提供给差分放大电路的输入端。

7. 发明授权

US06762896B2 Storage media reading writing system 失效
公开(公告)号：US06762896B2
公开(公告)日：2004-07-13
申请号：US09902581
申请日：2001-07-12
申请人： Hiroyasu Yoshizawa , Yoichiro Kobayashi , Toshio Shinomiya , Noriyuki Fujii , Masaki Yoshinaga
发明人： Hiroyasu Yoshizawa , Yoichiro Kobayashi , Toshio Shinomiya , Noriyuki Fujii , Masaki Yoshinaga
IPC分类号： G11B502
CPC分类号： G11B5/035 , G11B5/012 , G11B5/02 , G11B5/4833 , G11B5/484 , G11B33/121 , G11B33/122
摘要： The storage media recording/writing system includes a media drive circuit, a head retaining means, a head moving means, a head drive circuit, a signal processing circuit, and a controller to control these. The head drive circuit possesses a first semiconductor integrated circuit having an amplifier that amplifies the read signal from the head, and a second semiconductor integrated circuit placed between the first semiconductor integrated circuit and the signal processing circuit, which has a circuit that receives write data from the signal processing circuit and generates a drive signal to drive a write head. Further, the first semiconductor integrated circuit is mounted on a part near the front of the head retaining means, and the second semiconductor integrated circuit is installed on the side of the moving means.

8. 发明授权

US5542832A Rotary fluid compressor having an oldham mechanism 失效
标题翻译：具有老式机构的旋转流体压缩机
公开(公告)号：US5542832A
公开(公告)日：1996-08-06
申请号：US305944
申请日：1994-09-15
申请人： Yoshinori Sone , Takayoshi Fujiwara , Takashi Honjo , Takuya Hirayama , Hiroyasu Yoshizawa
发明人： Yoshinori Sone , Takayoshi Fujiwara , Takashi Honjo , Takuya Hirayama , Hiroyasu Yoshizawa
IPC分类号： F04C18/16 , F01C17/06 , F04C18/107 , F04C29/06 , F16D3/04 , F04C18/00 , F04C29/00
CPC分类号： F04C18/107 , F01C17/06 , F16D3/04
摘要： A fluid compressor having a rotational force transmitting mechanism. The mechanism comprises an Oldam portion, an Oldam ring and a second cylinder gearing. The Oldam portion is integral with a piston. The Oldam ring has a first pair of key grooves and a second pair of key grooves. The key grooves of the first pair extend at right angles to those of the second pair. The second cylinder bearing is fitted in the cylinder and has two projections fitted in the key grooves of the second pair. The Oldam ring is made of silicon nitride ceramic.
摘要翻译：一种具有旋转力传递机构的流体压缩机。该机构包括一个Oldam部分，一个Oldam环和一个第二缸齿轮。 Oldam部分与活塞是一体的。 Oldam环具有第一对键槽和第二对键槽。第一对的键槽与第二对的键槽成直角地延伸。第二气缸轴承安装在气缸中，并且具有两个突出部，该两个突起装配在第二对的键槽中。 Oldam环由氮化硅陶瓷制成。

9. 发明授权

US08598939B2 Switch circuit and semiconductor circuit 有权
标题翻译：开关电路和半导体电路
公开(公告)号：US08598939B2
公开(公告)日：2013-12-03
申请号：US13350801
申请日：2012-01-15
申请人： Tetsuhiro Shimizu , Satoshi Hanazawa , Toshio Shinomiya , Hiroyasu Yoshizawa
发明人： Tetsuhiro Shimizu , Satoshi Hanazawa , Toshio Shinomiya , Hiroyasu Yoshizawa
IPC分类号： H03K17/13
CPC分类号： H03K17/6874 , G01S7/52017
摘要： A T/R switch applicable to an ultrasonograph and capable of transmitting a signal reflected from a living body over a wide band with low noise without causing erroneous operation of the switch or element destruction even when the potential of a transmission signal or reflected signal changes includes: a common source terminal commonly and serially coupling the source terminals of two MOS transistors; a common gate terminal commonly coupling the gate terminals of the two MOS transistors; a main switch, the drain terminals of which are connected to input/output terminals; and a floating voltage circuit which is connected to the common gate terminal and common source terminal, makes the common gate terminal potential follow, in phase, variation in the common source terminal potential, and sends a signal to turn the switch on or off to the common gate terminal.
摘要翻译：适用于超声波诊断装置的AT / R开关，能够以较低的噪声在宽带上发送从生物体反射的信号，即使在发送信号或反射信号的电位变化的情况下，也不会导致开关或元件破坏的错误操作，公共源极端子共同并串联耦合两个MOS晶体管的源极端子; 通常连接两个MOS晶体管的栅极端子的公共栅极端子; 主开关，其漏极端子连接到输入/输出端子; 以及与公共栅极端子和公共源极端子连接的浮置电压电路，使公共栅极电位跟随同相源极端子电位的相位变化，并发送信号将开关接通或断开普通门终端。

10. 发明申请

US20070075774A1 Variable gain amplifier 有权
标题翻译：可变增益放大器
公开(公告)号：US20070075774A1
公开(公告)日：2007-04-05
申请号：US11484591
申请日：2006-07-12
申请人： Hiroyasu Yoshizawa , Satoshi Hanazawa
发明人： Hiroyasu Yoshizawa , Satoshi Hanazawa
IPC分类号： H03F3/45
CPC分类号： H03F3/45085 , H03F1/26 , H03F3/45475 , H03F3/72 , H03F2200/372 , H03F2203/45066 , H03F2203/45138 , H03F2203/45288 , H03F2203/45352 , H03F2203/45366 , H03F2203/45561 , H03F2203/7236 , H03G1/007 , H03G7/001
摘要： A variable gain amplifier of such configuration that can yield continuously and log-linearly variable gains in relation to control voltage and, at the same time, that does not use an attenuator, an element which otherwise would entail cause of increased noise. The amplifier includes a plurality of gm amplifiers connected in parallel with input signal, exponential multipliers connected respectively to the gm amplifiers, a control section to vary the multiplication coefficient of the exponential multipliers according to the external gain control signal, and an I-V converter circuit to aggregate current output after multiplication and convert the aggregated current output to voltage. A continuously variable gain characteristic can be obtained without the use of an attenuator but by varying multiplication coefficient according to control voltage.
摘要翻译：这种配置的可变增益放大器可以产生与控制电压相关的连续和对数线性可变增益，并且同时不产生衰减器，否则将导致增加噪声的元件。放大器包括与输入信号并联连接的多个gm放大器，分别连接到gm放大器的指数乘法器，根据外部增益控制信号改变指数乘法器的乘法系数的控制部分，以及IV转换器电路累加电流输出后乘以并将电流输出转换为电压。可以在不使用衰减器的情况下获得连续可变增益特性，而是根据控制电压改变乘法系数。

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