公开(公告)号：US07068691B2

公开(公告)日：2006-06-27

申请号：US10642373

申请日：2003-08-15

申请人： Norio Chujo ,  Osamu Kagaya

发明人： Norio Chujo ,  Osamu Kagaya

IPC分类号： H01S3/00

CPC分类号： H04B10/58 ,  H01S5/02284 ,  H01S5/0428 ,  H01S5/0622 ,  H04B10/504

摘要： In a directly modulated optical module, the input current to drive the semiconductor laser is controlled so as to make a rate of change in fall time smaller than a rate of change in rise time (inclination) in order to improve the eye opening of an eye pattern and extend the transmission distance. In addition, the input current is overshot at least during the period of transient state following the rising edge.

摘要翻译： 在直接调制的光学模块中，控制用于驱动半导体激光器的输入电流，以使得下降时间的变化率小于上升时间（倾斜度）的变化率，以改善眼睛的开眼 模式并延长传输距离。 此外，输入电流至少在上升沿之后的瞬态期间过冲。

公开(公告)号：US06774680B2

公开(公告)日：2004-08-10

申请号：US10379540

申请日：2003-03-06

申请人： Kengo Imagawa ,  Norio Chujo ,  Kaoru Arita ,  Yoshiharu Umemura ,  Masahiro Imanari

发明人： Kengo Imagawa ,  Norio Chujo ,  Kaoru Arita ,  Yoshiharu Umemura ,  Masahiro Imanari

IPC分类号： H03K522

CPC分类号： H03F3/45152 ,  H03F2203/45472 ,  H03F2203/45658 ,  H03F2203/45681 ,  H03K5/08 ,  H03K5/2409

摘要： A comparator is provided with a pair of transistors which are continuously in ON state, in which a switch unit constructed of a diode pair, for switching a current path in response to a high/low relationship between a voltage level of an input signal and a voltage level of a reference voltage, and a unit for converting a current into a voltage level are provided between emitter terminals of the transistor pair.

摘要翻译： 比较器具有连续处于导通状态的一对晶体管，其中由二极管对构成的开关单元用于响应于输入信号的电压电平和 参考电压的电压电平和用于将电流转换成电压电平的单元设置在晶体管对的发射极端子之间。

公开(公告)号：US06700369B1

公开(公告)日：2004-03-02

申请号：US09722298

申请日：2000-11-28

申请人： Masami Makuuchi ,  Ritsurou Orihashi ,  Norio Chujo ,  Masayoshi Takahashi ,  Yoshihiko Hayashi ,  Shinji Homma

发明人： Masami Makuuchi ,  Ritsurou Orihashi ,  Norio Chujo ,  Masayoshi Takahashi ,  Yoshihiko Hayashi ,  Shinji Homma

IPC分类号： G01R3312

CPC分类号： G01R33/1207 ,  G11B5/00 ,  G11B5/012 ,  G11B5/455 ,  G11B20/10009 ,  G11B27/36 ,  G11B2005/001 ,  G11B2220/20

摘要： A testing apparatus of a magnetic recording medium for conducting a test on the magnetic recording medium by using reproduced data obtained through reproduction of the magnetic medium, including a plurality of conversion means for converting the reproduced data into digital data, holding means for holding the digital data converted by the plurality of conversion means, data processing means for performing a calculation process on the digital data held by the holding means in relation to a magnetic characteristic of the magnetic recording medium, and analysis processing means for performing an analysis to determine whether or not information obtained by the data processing means satisfies a certain condition.

摘要翻译： 一种用于通过使用通过再现磁介质获得的再现数据在磁记录介质上进行测试的磁记录介质的测试装置，包括用于将再现数据转换为数字数据的多个转换装置，用于保持数字 由多个转换装置转换的数据，用于对由保持装置保持的数字数据相对于磁记录介质的磁特性执行计算处理的数据处理装置;以及分析处理装置，用于执行分析以确定是否或 不是由数据处理装置获得的信息不满足一定条件。