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1. 发明专利

JP2013029620A Optical modulation device and bias voltage control method 有权
标题翻译：光学调制装置和偏置电压控制方法
公开(公告)号：JP2013029620A
公开(公告)日：2013-02-07
申请号：JP2011164783
申请日：2011-07-27
申请人： Fujitsu Ltd , 富士通株式会社
发明人： ISHII YUJI
IPC分类号： G02F1/03
CPC分类号： H04B10/50595 , G02F1/0123 , G02F2203/20
摘要： PROBLEM TO BE SOLVED: To efficiently control a bias voltage of a signal input to an optical modulator at a high speed.SOLUTION: An optical modulation device includes a generation circuit, a superposing unit, an optical modulator, a calculation circuit, and a controller. The generation circuit generates a low-frequency signal which has a lower frequency than an electric signal having a predetermined frequency and whose amplitude average value does not equal a center value of the amplitude. The superposing unit superposes the low-frequency signal generated by the generation circuit on the electric signal. The optical modulator modulates light from a light source using an input signal as the electric signal obtained by superposing the low-frequency signal by the superposing unit, and outputs signal light. The calculation circuit calculates the average value and center value of the amplitude of a low-frequency component having the same frequency with the low-frequency signal among frequency components of the signal light output by the optical modulator. The controller controls the bias voltage of the input signal input to the optical modulator so that the average value of the amplitude of the low-frequency component calculated by the calculation circuit approximates the center value of the amplitude.
摘要翻译：要解决的问题：高效率地控制输入到光学调制器的信号的偏置电压。光调制装置包括生成电路，叠加单元，光调制器，计算电路和控制器。生成电路生成低频信号，该低频信号的频率比具有预定频率的电信号低，振幅平均值不等于振幅的中心值。叠加单元将由发生电路产生的低频信号叠加在电信号上。光调制器使用输入信号来调制来自光源的光，作为通过叠加单元叠加低频信号而获得的电信号，并输出信号光。计算电路计算由光调制器输出的信号光的频率分量之中与低频信号具有相同频率的低频分量的振幅的平均值和中心值。控制器控制输入到光调制器的输入信号的偏置电压，使得由计算电路计算的低频分量的振幅的平均值近似于振幅的中心值。版权所有（C）2013，JPO＆INPIT

2. 发明专利

JP2006186502A PLL UNIT AND VIDEO SYNCHRONIZATION CONTROL DEVICE 审中-公开
公开(公告)号：JP2006186502A
公开(公告)日：2006-07-13
申请号：JP2004375892
申请日：2004-12-27
申请人： FUJITSU LTD
发明人： RIKIMARU KENJI , ISHII YUJI , HASEGAWA MAKOTO
IPC分类号： H03L7/095 , H03L7/107
摘要： PROBLEM TO BE SOLVED: To stably generate a signal synchronously with a reference signal at a high speed. SOLUTION: A phase difference count section 15a counts a phase difference between the reference signal f1 and a frequency division signal f2 to produce a phase difference count C. A threshold value discrimination section 15b compares the phase difference count C with a threshold value to produce a phase difference discrimination signal D2 denoting whether or not the phase difference count C exceeds the threshold value. When recognizing an outside range of the threshold value indicating that the phase difference count C exceeds the threshold value on the basis of the phase difference discrimination signal D2, a phase shift processing section 16 carries out phase shift processing for forcibly shifting a phase of the frequency division signal f2 so as to make the phase difference zero on the basis of the phase difference count C thereby allowing the PLL unit to start PLL feedback control from a state of zero phase difference. COPYRIGHT: (C)2006,JPO&NCIPI

3. 发明专利

JP2002024167A DATA TRANSFER DEVICE 失效
公开(公告)号：JP2002024167A
公开(公告)日：2002-01-25
申请号：JP2000206321
申请日：2000-07-07
申请人： FUJITSU LTD
发明人： YAMAJI KATSUICHI , YAGAWA HIROBUMI , HARADA YOSHIHIRO , ISHII YUJI
IPC分类号： G06F13/12 , G06F5/06 , G06F5/14 , G06F12/00 , G06F13/38 , H04L7/00 , H04L13/08
摘要： PROBLEM TO BE SOLVED: To eliminate the unwanted delay time or omission of data even when a write data amount is fluctuated concerning a data transfer device for changing a data velocity between an input device and an output device via a buffer. SOLUTION: A buffer storage quantity is detected from the write address and read address of the buffer and corresponding to a change in this storage quantity, write address or read address, a threshold is set. At the same time, a write request to the input device and a read permission to the output device are performed from the relation of this threshold and the storage quantity.

4. 发明专利

JPH1079716A REPEATER 失效
公开(公告)号：JPH1079716A
公开(公告)日：1998-03-24
申请号：JP23314296
申请日：1996-09-03
申请人： FUJITSU LTD
发明人： TAKEDA YUTAKA , ISHII YUJI
IPC分类号： H04J3/00 , H04J3/08 , H04L25/52
摘要： PROBLEM TO BE SOLVED: To prevent the delay of a matrix conversion circuit against a main signal by executing connection for inputting/outputting only SOH data dropped from a drop insertion circuit or inserted into the circuit. SOLUTION: Main signal data are randomly developed into parallel signals from series signals in a series/parallel conversion circuit 1 and SOH data are taken out in the drop/insertion circuit 2. Then, they are sent to a matrix conversion circuit 4a and they are rearranged so as to have the head bits in the MSB of the parallel signal to output drop SOH data. At the time of insertion, a processing opposite to the processing is executed. Data are rearranged so as to adjust them to the main signals in a matrix conversion circuit 4b. Then, insertion SOH data is inserted into the main signal in the circuit 2 and parallel main signals developed at random are outputted from a parallel/series conversion circuit 5 as the series signals. Then, the main signals which are thus outputted are not necessary to pass through the matrix conversion circuit and output delay by it can be suppressed.

5. 发明专利

JPH02228819A B8ZS CODING CIRCUIT 失效
公开(公告)号：JPH02228819A
公开(公告)日：1990-09-11
申请号：JP5059789
申请日：1989-03-02
申请人： FUJITSU LTD
发明人： ISHII YUJI
IPC分类号： H04L25/49 , H03M5/16 , H03M7/14
摘要： PURPOSE:To simplify a circuit constitution and to miniaturize a circuit scale by inverting polarity in compliance with the bipolar rules for 4th bit and 5th bit periods. CONSTITUTION:When a consecutive 0 detection circuit 10 detects that the content of a data signal S1 inputted serially to a data holding section 1 is 8-consecutive '0s', the holding section 1 generates an output signal S3 to a control signal generating circuit 3 to drive the circuit 3. A polarity distributing circuit 2 receives the output signal S2 of a specific stage of the data latch section 1 and outputs alternately positive/negative polarity signals S5 and S6 in compliance with the bipolar rules every time a level '1' is received to apply distribution. A polarity distributing control circuit 4 receives a control signal S4 only for the period of 4th and 5th clocks from the control signal generating circuit 3, inverts the polarity signals S5 and S6 and generates a polarity data output 5 and a negative data output 6. Thus, the circuit constitution is simplified, the circuit scale is miniaturized and the power consumption is reduced.

6. 发明专利

JP2008040435A Optical transmission system 有权
标题翻译：光传输系统
公开(公告)号：JP2008040435A
公开(公告)日：2008-02-21
申请号：JP2006218540
申请日：2006-08-10
申请人： Fujitsu Ltd , 富士通株式会社
发明人： RIKIMARU KENJI , ISHII YUJI , MORI KAZUYUKI
IPC分类号： G02B26/02 , G02B6/00 , H04B10/00 , H04B10/40 , H04B10/50 , H04B10/60
CPC分类号： G02B6/266 , G02B6/3512 , G02B6/3532 , G02B6/3594
摘要： PROBLEM TO BE SOLVED: To correct the relation between the control angle of a mirror and the attenuation quantity of an optical signal to bring it closely to a linear relation and to reduce the influence of the variation in voltage and noise. SOLUTION: In the optical transmission system 1, the optical signal is reflected on a micromirror 11 and made incident on an optical fiber 13, and the attenuation quantity of the optical signal is controlled by varying the incident light quantity by controlling the angle of the micromirror 11. An optical filter 14 is provided between the micromirror 11 and the optical fiber 13 for correcting the relation between the control angle or the control voltage of the micromirror 11 and the attenuation quantity of the optical signal for bringing it closely to the linear relation. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：纠正镜子的控制角度与光信号的衰减量之间的关系，使其与线性关系密切相关，并减少电压和噪声变化的影响。解决方案：在光传输系统1中，光信号在微镜11上被反射并入射到光纤13上，并且通过控制角度来改变入射光量来控制光信号的衰减量微镜11设置在微镜11和光纤13之间，用于校正微镜11的控制角或控制电压与光信号的衰减量之间的关系，以使其紧密接触线性关系。版权所有（C）2008，JPO＆INPIT

7. 发明专利

JP2009175614A Optical device, optical communication apparatus, and method of controlling optical device 审中-公开
标题翻译：光学装置，光通信装置和控制光学装置的方法
公开(公告)号：JP2009175614A
公开(公告)日：2009-08-06
申请号：JP2008016429
申请日：2008-01-28
申请人： Fujitsu Ltd , 富士通株式会社
发明人： FURUKAWA HIROYUKI , ISHII YUJI , MORI KAZUYUKI
IPC分类号： G02B26/08 , G02B26/00
CPC分类号： G02B26/02 , G02B6/3512 , G02B6/3588 , G02B26/0833
摘要： PROBLEM TO BE SOLVED: To perform attenuation control of light and to suppress an optical surge generated by the optical switch when power to the optical switch is disconnected.
SOLUTION: An I/O port group 110 comprises an input port and an output port. A movable mirror 151 reflects the light input through an input port 111 and aligns the light to a port 112, and changes the angle of the light reflected according to a driving voltage supplied thereto. A control unit 160 adjusts the driving voltage supplied to the movable mirror 151 within a range lower than the voltage at which the degree of alignment of the reflected light with respect to the port 112 is maximized and attenuates the reflected light.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了执行光的衰减控制，并且当对光开关的电力被断开时，抑制由光开关产生的光波动。解决方案：I / O端口组110包括输入端口和输出端口。可移动镜151反射通过输入端口111输入的光，并将光对准端口112，并且根据提供给其的驱动电压改变反射光的角度。控制单元160在比反射光相对于端口112的对准程度最大化的电压低的范围内调节提供给可移动反射镜151的驱动电压，并且衰减反射光。版权所有（C）2009，JPO＆INPIT

8. 发明专利

JP2005039522A Wireless lan data transmission system, method for transmitting wireless lan data and wireless lan data transmission program 有权
标题翻译：无线LAN数据传输系统，无线局域网数据传输方法及无线局域网数据传输方案
公开(公告)号：JP2005039522A
公开(公告)日：2005-02-10
申请号：JP2003274463
申请日：2003-07-15
申请人： Fujitsu Ltd , 富士通株式会社
发明人： MIYAJIMA SHINICHIRO , ICHIYANAGI KAZUHIRO , KUSUMOTO AKIKO , NAGANO YUJI , EGUCHI KATSUHIRO , TAKESHITA NAOYUKI , ISHII YUJI , IMOTO KAZUYUKI
IPC分类号： H04L12/28 , H04W36/06 , H04W36/08 , H04Q7/22 , H04Q7/38
CPC分类号： H04W36/02
摘要： PROBLEM TO BE SOLVED: To improve the transmission efficiency of data and to transmit data of high quality by securing the continuity of data in a wireless communication system.
SOLUTION: If communication between a wireless LAN device 200 and a 1st access point 221 is disabled when the wireless LAN device 200 tries to move from a communication area of the 1st access point 221 to a communication area of a 2nd access point 222, a memory control part 206 stops data transmission to the 1st access point 221. In this case, the data to be transmitted to the 1st access point 221 are still stored in a memory 207. After the wireless LAN device 200 entered the communication area of the 2nd access point 222, the memory control part 206 restarts the transmission of untransmitted data previously stored in the memory 207. Then the transmission of data following the untransmitted data is started.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：通过确保无线通信系统中的数据的连续性来提高数据的传输效率和传输高质量的数据。解决方案：当无线LAN设备200尝试从第一接入点221的通信区域移动到第二接入点222的通信区域时，如果无线LAN设备200与第一接入点221之间的通信被禁用存储器控制部分206停止向第一接入点221的数据传输。在这种情况下，要发送到第一接入点221的数据仍然存储在存储器207中。在无线LAN设备200进入通信区域第二接入点222，存储器控制部分206重新开始先前存储在存储器207中的未发送数据的传输。然后开始发送未发送数据之后的数据。版权所有（C）2005，JPO＆NCIPI

9. 发明专利

JP2003115853A COMMUNICATION DEVICE 审中-公开
公开(公告)号：JP2003115853A
公开(公告)日：2003-04-18
申请号：JP2001308916
申请日：2001-10-04
申请人： FUJITSU LTD
发明人： ISHII YUJI
IPC分类号： H04J3/00 , H04L12/42
摘要： PROBLEM TO BE SOLVED: To attain simplification of a configuration and reduction of scale and to flexibly deal with extension or change in the configuration in a communication device to be provided as a node or terminal of a transmission system to which a synchronous transfer mode is applied. SOLUTION: This device is provided with a network interface means for performing any one of transmission, reception and repeating of transmitting information in the node or terminal of a network to which the synchronous transfer mode is applied, and a transmission permission/non-permission discriminating means for discriminating whether or not the transmission of specific transmitting information in which a transmission velocity exceeds the transmission capacity of a channel assigned to the communication device connected to the network by such a communication device is to be permitted and when the result of discrimination carried out by the transmission permission/non- permission discriminating means is true, the network interface means applies a right of transmission showing the result of this discrimination via the network to the communication device as information matched to a frame constitution based on the synchronous transfer mode.

10. 发明专利

JP2000115768A CONNECTION CONTROLLER 失效
公开(公告)号：JP2000115768A
公开(公告)日：2000-04-21
申请号：JP28034198
申请日：1998-10-01
申请人： FUJITSU LTD
发明人： HASEGAWA MAKOTO , SUGIYAMA SEIJI , KITAMURA KIYOSHI , ISHII YUJI , ENDO ATSUSHI , ARITA AKIFUMI , OYAJI KENJI , MOMII AKINORI , IHARA NORIYUKI , TERUI YUICHI
IPC分类号： H04N19/102 , H04L12/40 , H04N7/24 , H04N19/00 , H04N19/166 , H04N19/37 , H04N19/423 , H04N19/46 , H04N19/65 , H04N19/70 , H04N19/89
摘要： PROBLEM TO BE SOLVED: To enhance the flexibility by connecting compression coding conversion units and line interface units for plural image communication systems with different compression coding rules to a single bus so as to avoid a fixed connection relation between the line interface and a transcoder. SOLUTION: A packet generating section 51 of data transmitter side transmission units 40, 42 generates a packet based on its own unit channel ID set in advance to a transmission channel ID setting section 50 and transmits the packet to a high speed serial bus 31. A reception section 53 of data receiver side reception units 44, 46 receives the packet and a channel ID check section 55 compares the channel ID of the received packet with its own unit reception channel ID set in advance of a reception channel ID setting section 54 and when they are coincident, the packet is outputted to an internal circuit 56 of its own unit. Since the internal circuit of its own unit receives the packet when the channel ID of the received packet is coincident with the channel ID of its own unit, various communication can be realized and an exclusive control unit for the purpose is not required.

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