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. 发明专利

JPH10209825A THRESHOLD VALUE CONTROL CIRCUIT 失效
公开(公告)号：JPH10209825A
公开(公告)日：1998-08-07
申请号：JP985197
申请日：1997-01-23
申请人： FUJITSU LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： IDE SATOSHI , OKUMURA YASUYUKI
IPC分类号： G01R19/04 , H03K5/08
摘要： PROBLEM TO BE SOLVED: To prevent the generation of the deviation of a threshold level, and to identify a non-signal by outputting a level held higher than a non-signal level only by a forced offset value at the time of inputting no signal, and outputting the voltage-division value of signal amplitude as a threshold level when the input signal level is more than a prescribed value. SOLUTION: A peak detecting circuit 10 with a dead zone outputs a level almost equal to a non-signal level at the time of inputting no signal, and when the level of the input signal is more than a prescribed value, the circuit 10 outputs a 1 side output level lower only by level shift amounts equal to VOF×[(R1 +R0 )/R0 ]. In this case, the VOF indicates a forced offset value, and the R0 and R1 indicate resistance values. A voltage dividing circuit operate voltage division at R1 :R0 to 1 side and 0 side output levels, and a level shift circuit 12 outputs a level held higher than the non-signal level only by the forced offset value VOF at the time of inputting no signal, and outputs the voltage-division value at the R1 :R0 of signal amplitude as a threshold level when the level of the input signal is more than a prescribed value.

2. 发明专利

JPH09307505A OPTICAL TRANSMITTER FOR BURST TRANSMISSION 失效
公开(公告)号：JPH09307505A
公开(公告)日：1997-11-28
申请号：JP11800196
申请日：1996-05-13
申请人： FUJITSU LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： IDE SATOSHI , MAEKAWA EIJI
IPC分类号： H04B10/293 , H04B10/07 , H04B10/2507 , H04B10/524 , H04B10/556 , H04B10/564 , H04B10/572 , H04B10/14 , H04B10/00 , H04B10/04 , H04B10/06
摘要： PROBLEM TO BE SOLVED: To send a transmission signal without deteriorating a duty factor by detecting a zero cross level with high precision even when the number of complicated peak detection circuits is decreased in the optical transmitter. SOLUTION: In the case of transmitting a dummy pulse signal, a duty control signal 20a generated in response to a quantity of duty deterioration of a dummy pulse string monitored by a monitor photo diode 12 is fed back to a duty adjustment circuit 40. In the case of sending a data signal 13b, the duty control signal 20a at that point of time is stored to execute duty adjustment to prevent deterioration in the duty factor.

3. 发明专利

JPH1127115A THRESHOLD SIGNAL GENERATING CIRCUIT AND DIGITAL SIGNAL RECOVERY CIRCUIT PROVIDED WITH THE GENERATING CIRCUIT 失效
公开(公告)号：JPH1127115A
公开(公告)日：1999-01-29
申请号：JP17943997
申请日：1997-07-04
申请人： FUJITSU LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： IDE SATOSHI , KAJIWARA TAKAFUMI
IPC分类号： H03K5/08
摘要： PROBLEM TO BE SOLVED: To suppress noise in a non-signal state over a wide dynamic range of an input signal in the digital signal recovery circuit consisting of a voltage division circuit that generates a threshold signal level resulting from a prescribed voltage division of an output of a bottom detection circuit and an output of a maximum value detection circuit. SOLUTION: In a state of a non-signal input, an output PD of a peak detection circuit and an output BD of a bottom detection circuit are equal to each other as a reset state of the circuit from the standpoint of the input signal state. However, since an output LS of a level shift circuit is set higher than the output BD by a prescribed level, the output LS is higher than the output PD, and then the output LS is selected as a maximum level detection signal MX and a threshold signal level TH is higher than the output BD by, e.g. LS/2. Noise in a non-signal state is suppressed by selecting the level LS/2 to be sufficiently higher than a peak level of the noise. In the case of the input state receiving a positive pulse signal, the output PD is higher than the output LS. Thus, the output PD is selected as the maximum level detection signal MX, and the threshold signal level TH is higher than the output BD by a level PD/2, which is a half of the input level.

4. 发明专利

JP2013143759A Optical transmission device and optical transmission method 有权
标题翻译：光传输设备和光传输方法
公开(公告)号：JP2013143759A
公开(公告)日：2013-07-22
申请号：JP2012004502
申请日：2012-01-12
申请人： Fujitsu Ltd , 富士通株式会社
发明人： IDE SATOSHI , IKEUCHI AKIRA
IPC分类号： H04B10/40 , H04B10/50 , H04B10/556 , H04B10/60
CPC分类号： H04B10/40
摘要： PROBLEM TO BE SOLVED: To allow an optical transmission operation to continue even at a high temperature exceeding the specification temperature of a light emitting element.SOLUTION: An optical transmission device 100 has: an optical transmitter 101 which includes a light emitting element 102 and a light emitting element drive circuit 104; a temperature sensor 141 which detects the temperature of the optical transmitter 101; and a control part 150 which, when the temperature detected by the temperature sensor 141 is the specification temperature of the light emitting element 102 or higher, switches an operational mode of the optical transmitter 101 from a normal mode to a low power mode and reduces thermal effect on the light emitting element 102 to continue the operation of the light emitting element 102. The control part 150 executes the following controls in combination: lowering transmission speed of a transmission interface circuit 130 and a light emitting element drive circuit 104 at the time of low power mode; stopping a band expansion operation of the light emitting element drive circuit 104; lowering power of the light emitting element 102; and reducing the number of transmission channels of the transmission interface circuit 130 and the light emitting element drive circuit 104.
摘要翻译：要解决的问题：即使在超过发光元件的规格温度的高温下也允许光传输操作继续。解决方案：光传输装置100具有：光发射机101，其包括发光元件102和发光元件驱动电路104; 检测光发射机101的温度的温度传感器141; 以及控制部150，当由温度传感器141检测到的温度是发光元件102的规格温度以上时，将光发送器101的工作模式从正常模式切换为低功率模式，并降低热影响发光元件102以继续发光元件102的操作。控制部150组合执行以下控制：降低传输接口电路130和发光元件驱动电路104的传输速度低功耗模式; 停止发光元件驱动电路104的频带扩展动作; 降低发光元件102的功率; 并且减少传输接口电路130和发光元件驱动电路104的传输通道的数量。

5. 发明专利

JP2010130588A Optical receiver, optical receiving circuit, and optical receiving method 有权
标题翻译：光接收机，光接收电路和光接收方式
公开(公告)号：JP2010130588A
公开(公告)日：2010-06-10
申请号：JP2008305656
申请日：2008-11-28
申请人： Fujitsu Ltd , 富士通株式会社
发明人： SUGAWARA MARIKO , TSUNODA YUKITO , IDE SATOSHI
IPC分类号： H04B10/2507 , H04B10/516 , H04B10/556 , H04B10/61 , H04B10/69
CPC分类号： H04B10/677
摘要： PROBLEM TO BE SOLVED: To provide: an optical receiver which can reduce an error rate in the identification of data; an optical receiving circuit; and an optical receiving method. SOLUTION: After an optical signal output from a delay interference instrument is converted to an electric signal, a data signal is generated which is a difference between the positive-phase component and the negative-phase component of the electric signal, a complementary signal is generated which is the sum of the positive-phase component and the negative-phase component of the electric signal, and a difference between the generated data signal and the generated complementary signal is calculated. Thus, the electric signal is output with fluctuations suppressed in phase potential. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供：可以减少数据识别中的错误率的光接收机; 光接收电路; 和光接收方法。解决方案：从延迟干扰仪输出的光信号转换为电信号后，产生数据信号，该信号是电信号的正相分量与负相分量之差，互补产生信号，其是电信号的正相分量和负相位分量的和，并且计算所生成的数据信号和产生的互补信号之间的差。因此，电信号以相位电位抑制的波动输出。版权所有（C）2010，JPO＆INPIT

6. 发明专利

JP2006074214A Optical receiving device 审中-公开
标题翻译：光接收装置
公开(公告)号：JP2006074214A
公开(公告)日：2006-03-16
申请号：JP2004252815
申请日：2004-08-31
申请人： Fujitsu Ltd , 富士通株式会社
发明人： NAKAMOTO KENICHI , IDE SATOSHI , MORI KAZUYUKI , TANAKA HIROMASA
IPC分类号： H04B10/40 , H04B10/07 , H04B10/50 , H04B10/60 , H04B10/67 , H04B10/69
CPC分类号： H03K5/1565 , H03F3/087 , H03F2200/321 , H03F2200/462 , H03F2200/465 , H04B10/66
摘要： PROBLEM TO BE SOLVED: To provide an optical receiving device where a reception characteristic in an optical reception system is improved.
SOLUTION: The device is provided with a photoelectric conversion element 1 receiving an optical signal and performing light/electric conversion and a data detection part 2 detecting data modulated by the optical signal by using an identification level on the optical signal received by the photoelectric conversion element 1. The device is provided with an identification level control part 3 which feed forward-controls the identification level used in the data detection part 2 based on a level of the received optical signal.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：解决的问题：提供光接收系统中的接收特性提高的光接收装置。解决方案：该装置设置有接收光信号并执行光/电转换的光电转换元件1，以及数据检测部分2，通过使用由光信号接收的光信号上的识别电平来检测由光信号调制的数据光电转换元件1.该装置设置有识别电平控制部分3，其基于所接收的光信号的电平向前控制数据检测部分2中使用的识别电平。版权所有（C）2006，JPO＆NCIPI

7. 发明专利

JP2005099682A Optical switch controller and moving body controller 有权
标题翻译：光开关控制器和移动体控制器
公开(公告)号：JP2005099682A
公开(公告)日：2005-04-14
申请号：JP2004107982
申请日：2004-03-31
申请人： Fujitsu Ltd , 富士通株式会社
发明人： IDE SATOSHI , MORI KAZUYUKI , TAKAHASHI TAKESUKE , MATSUYAMA SATORU
IPC分类号： G02B26/08 , G02B6/35 , H04Q11/00
CPC分类号： G02B6/3588 , G02B6/3518 , G02B6/3556 , G02B6/357 , G02B6/3584 , H04Q11/0005 , H04Q2011/003 , H04Q2011/0039
摘要： PROBLEM TO BE SOLVED: To conduct highly precise control so as to reduce residual vibration, while conducting moving control of a moving body such as a tilt mirror or the like. SOLUTION: A processing section 11 outputs driving signals which control the angle of a tilt mirror 1 and the drive signals are D/A converted by a D/A converter 12, raised to higher voltages by a high voltage amplifier 13 and supplied to the tilt mirror 1. The capacitance of the tile mirror 1 is varied corresponding to a change in the angle of the tilt mirror 1. A mirror angle detection section 14 detects the capacitance and feeds back the detected capacitance to the processing section 11 as a correction value. The processing section 11 corrects the drive signals by using the correction value which is obtained, while the angle of the tile mirror 1 is actually varied. Thus, angular control of the tilt mirror 1 is conducted in a highly precise manner. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：在进行诸如倾斜镜等移动体的移动控制的同时，进行高精度的控制以减少残余振动。解决方案：处理部分11输出控制倾斜镜1的角度并且驱动信号由D / A转换器12转换为D / A的驱动信号，由高压放大器13升高到更高的电压，并提供相对于倾斜镜1的角度的变化，瓦镜1的电容变化。镜角检测部14检测电容，并将检测到的电容反馈到处理部11，作为校正值。处理部分11通过使用所获得的校正值来校正驱动信号，同时瓦片镜1的角度实际上是变化的。因此，以高度精确的方式进行倾斜镜1的角度控制。版权所有（C）2005，JPO＆NCIPI

8. 发明专利

JPH11122188A LIGHT SIGNAL RECEPTION DEVICE/METHOD 失效
公开(公告)号：JPH11122188A
公开(公告)日：1999-04-30
申请号：JP28698297
申请日：1997-10-20
申请人： FUJITSU LTD
发明人： IDE SATOSHI
IPC分类号： H04B10/293 , H04B10/07 , H04B10/2507 , H04B10/40 , H04B10/50 , H04B10/564 , H04B10/572 , H04B10/60 , H04B10/69 , H04B10/14 , H04B10/04 , H04B10/06 , H04B10/26 , H04B10/28
摘要： PROBLEM TO BE SOLVED: To speedily stabilize a gain to optimum one without a transient response (overshoot) in receiving respective cell signals by providing a dummy system gain variable amplification part, a storage part holding gain information and a signal system gain variable amplification part. SOLUTION: A preamplifier 12 amplifies output from a photodiode 11 receiving a cell signal CL transmitted from respective subscribers and outputs it as an input signal Sin. The dummy system gain variable amplification part 21 amplifies the input signal Sin by feedback control with the variable gain and generates a dummy amplification signal having prescribed output amplitude and stores gain information Ig denoting the gain in the storage part 22. The signal system gain variable amplification part 23 amplifies the input signal Sin which is continuously received by feed forward control with the gain shown by gain information Ig which is read from the storage part 22 and generates an amplification signal Sa having a prescribed output amplitude.

9. 发明专利

JPH1049244A REFERENCE CURRENT AND VOLTAGE CIRCUIT AND DIFFERENTIAL AMPLIFICATION DEVICE 失效
公开(公告)号：JPH1049244A
公开(公告)日：1998-02-20
申请号：JP19881796
申请日：1996-07-29
申请人： FUJITSU LTD
发明人： IDE SATOSHI
IPC分类号： G05F3/24 , H03F1/30 , H03F3/45
摘要： PROBLEM TO BE SOLVED: To provide an amplification device which has variation in amplification gain suppressed as to an amplification device which uses a MOS-FET. SOLUTION: The device has a 1st MOS-FET and a 2nd MOS-FET which has nearly the same characteristics with the said FET and also has a reference resistance connected to its source or drain, the sources of those MOS-FETs or reference resistances connected to the source of the 1st MOS-FET and the source of the 2nd MOS-FET are connected in common, and the ratio of currents flowing to those MOS-FETs is held at a previously set value. Further, a control means is provided which controls the composite current of currents flowing to those MOS-FETs so that a potential which is nearly equal to the difference voltage between the gate-source voltage of the 1st MOS-FET and the gate-source voltage of the 2nd MOS-FET is applied across the reference voltages; and the controlled composite current is used as a reference current and a voltage developed at the source-side terminal of the MOS-FETs connected in common is used as a reference voltage.

10. 发明专利

JPH06140668A SEMICONDUCTOR DEVICE 失效
公开(公告)号：JPH06140668A
公开(公告)日：1994-05-20
申请号：JP28777092
申请日：1992-10-26
申请人： FUJITSU LTD
发明人： IDE SATOSHI
IPC分类号： H01L33/06 , H01L33/14 , H01L33/30 , H01L33/40 , H01S5/00 , H01L33/00 , H01S3/18
摘要： PURPOSE:To enable the structure of suppressing the diffusion of acceptor impurities from a p-type layer to a low-impurity concentration active layer, by using the p-type layer contained especially in acceptor impurities, concerning a III-V compound semiconductor device. CONSTITUTION:A group III-V compound semiconductor layer 11 performing capture action of acceptor impurities is made on the p-type semiconductor layer 10 of group III-V compound containing acceptor impurities. A III-V compound semiconductor active layer 13 low in impurity concentration is made on this semiconductor layer 11. That is, the diffusion of impurities from a substrate 10 to the active layer 13 is suppressed by the acceptor impurity capture action of the III-V compound semiconductor layer. The diffusion capture action is brought about by the mutual action between lattice defect and acceptor impurities. Accordingly, if capture regions are provided in a plurality of sections, the influence of diffusion to the active layer 13 can be controlled more effectively.

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