专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5543952A Optical transmission system 失效
标题翻译：光传输系统
公开(公告)号：US5543952A
公开(公告)日：1996-08-06
申请号：US526277
申请日：1995-09-11
申请人： Kazushige Yonenaga , Shigeru Kuwano , Nori Shibata , Seiji Norimatsu
发明人： Kazushige Yonenaga , Shigeru Kuwano , Nori Shibata , Seiji Norimatsu
IPC分类号： H04B10/50 , H04B10/508 , H04B10/516 , H04B10/54 , H04B10/04
CPC分类号： H04B10/505 , H04B10/5051 , H04B10/508 , H04B10/5167 , H04B10/541
摘要： In a transmitter side in an optical transmission system, an input binary signal is converted into a duobinary signal, and the duobinary signal is applied to an optical modulation device which provides an optical intensity modulation signal, wherein the optical intensity for a center value of the duobinary signal is a minimum, the optical intensity for the other two values of the duobinary signal is a maximum, and an optical phase for those two values is opposite to each other. In a receiver side, simple direct detection is carried out for receiving optical signal through an optical transmission line to provide a demodulated binary signal. Thus, an original binary signal is recovered without a duobinary decoder and receiver sensitivity degradation. In the optical transmission system, an optical carrier frequency component in a signal spectrum is suppressed, a signal bandwidth of the modulated light is reduced in half to that of a prior art, so an optical transmission system for long distance, high bit rate and large traffic capacity is obtained.
摘要翻译：在光传输系统的发射机侧，输入二进制信号被转换为双二进制信号，并且双二进制信号被施加到提供光强度调制信号的光调制装置，其中，用于中心值的光强度双二进制信号是最小的，双二进制信号的其他两个值的光强度是最大的，并且这两个值的光学相位彼此相反。在接收机侧，进行简单的直接检测，以通过光传输线接收光信号以提供解调的二进制信号。因此，原始二进制信号被恢复而没有双二进制解码器和接收机灵敏度降级。在光传输系统中，信号频谱中的光载波频率分量被抑制，调制光的信号带宽减小到现有技术的一半，因此用于长距离，高比特率和大的光传输系统获得交通容量。

2. 发明授权

US5289116A Apparatus and method for testing electronic devices 失效
标题翻译：用于测试电子设备的装置和方法
公开(公告)号：US5289116A
公开(公告)日：1994-02-22
申请号：US952469
申请日：1992-09-28
申请人： Jun Kurita , Kiyoyasu Hiwada , Nobuyuki Kasuga , Yoichiro Yamada , Shigeru Kuwano , Keita Gunji , Tomoya Yamazaki
发明人： Jun Kurita , Kiyoyasu Hiwada , Nobuyuki Kasuga , Yoichiro Yamada , Shigeru Kuwano , Keita Gunji , Tomoya Yamazaki
IPC分类号： G01R31/3167 , G01R31/319 , G01R31/3193 , G01R31/28
CPC分类号： G01R31/3167 , G01R31/31922 , G01R31/3193
摘要： An apparatus 1 for testing mixed signal electronic devices (i.e., devices, such as LSI devices, whose input/output signals include direct current signals, digital signals and analog signals, where the time relationship between the various input and output signals may be either synchronous or asynchronous) includes a master clock subsystem (MCLK-SS) 11, a subsystem group comprised of a digital master subsystem (DM-SS) 12, a digital slave subsystem (DS-SS) 13, a waveform generator subsystem (WG-SS) 14, a waveform digitizer subsystem (WD-SS) 15, a time measuring module (TMM) 16, and a direct current subsystem (DC-SS) 17, and an interfacing test head 18. The MCLK-SS 11 receives a master clock from a timing generator 21 or DSP 23 of the device under test (DUT) 186 and generates a first master clock MCLK1 and a second master clock MCLK2, each of which is synchronized with the master clock from the DUT. A reference clock generator 111, which receives the output of the buffer 181, supplies a standard clock to the first and second clock generators 112, 113, which in turn generate the first and second master clock signals.
摘要翻译：一种用于测试混合信号电子装置（即诸如LSI装置的装置，其输入/输出信号包括直流信号，数字信号和模拟信号的装置1），其中各种输入和输出信号之间的时间关系可以是同步的或异步）包括主时钟子系统（MCLK-SS）11，由数字主子系统（DM-SS）12，数字从属子系统（DS-SS）13，波形发生器子系统（WG-SS））14，波形数字化器子系统（WD-SS）15，时间测量模块（TMM）16和直流子系统（DC-SS）17以及接口测试头18.MCLK-SS11接收主机来自被测器件（DUT）186的定时发生器21或DSP 23的时钟，并且产生第一主时钟MCLK1和第二主时钟MCLK2，其中每一个与来自DUT的主时钟同步。接收缓冲器181的输出的参考时钟发生器111将标准时钟提供给第一和第二时钟发生器112,113，第一和第二时钟发生器112,113又产生第一和第二主时钟信号。

3. 发明授权

US07076166B2 Low-cost optical burst transmission system, apparatus, and method 失效
公开(公告)号：US07076166B2
公开(公告)日：2006-07-11
申请号：US10212389
申请日：2002-08-05
申请人： Masaru Fuse , Toru Shiozaki , Yoshikazu Ishii , Hiroaki Asano , Kuniaki Utsumi , Katsumi Iwatsuki , Hitoshi Uematsu , Shigeru Kuwano , Mitsuhiro Teshima
发明人： Masaru Fuse , Toru Shiozaki , Yoshikazu Ishii , Hiroaki Asano , Kuniaki Utsumi , Katsumi Iwatsuki , Hitoshi Uematsu , Shigeru Kuwano , Mitsuhiro Teshima
IPC分类号： H04J14/00
CPC分类号： H04J14/0227 , H04J14/0226 , H04J14/0241 , H04J14/0246 , H04J14/025 , H04J14/0282 , H04L7/0008 , H04L7/0075
摘要： This invention discloses an optical burst transmission system in which an optical generator generates Type 1 lightwaves having different wavelengths corresponding to transmission lines and having undergone intensity modulation with obtained data; a broad spectrum optical generator generates, by incorporating Type 2 lightwaves, a Type 3 lightwave using a fewer light emitting devices than the number of the Type 1 lightwaves, each Type 2 lightwaves having a corresponding wavelength apart from Type 1 lightwave's wavelength with an FSR interval and having undergone the intensity modulation with clock signals; an optical multiplexer multiplexes the Type 1 and Type 3 lightwaves to output the combination to each transmission line; and an optical routing unit extracts, from the combination, pairs of one Type 1 lightwave and one Type 2 lightwave having the corresponding wavelength, and guides pairs to each transmission line corresponding to the Type 1 lightwave's wavelength in each pair.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式