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1. 发明授权

US08076966B2 Analog switch circuit for wide frequency band 有权
标题翻译：模拟开关电路用于宽频带
公开(公告)号：US08076966B2
公开(公告)日：2011-12-13
申请号：US12710543
申请日：2010-02-23
申请人： Minoru Hosoda , Mitsuo Kitamura
发明人： Minoru Hosoda , Mitsuo Kitamura
IPC分类号： H03K17/16
CPC分类号： H03K17/063 , H03K17/145 , H03K17/6877
摘要： An analog switch circuit that includes a first field-effect transistor, a source of which is coupled to a first switch terminal, and a drain of which is coupled to a second switch terminal; a first capacitance storing electric charge; a second capacitance storing electric charge; a first switch circuit that couples the first capacitance between a direct current voltage node and a reference potential node; a second switch circuit that couples the first capacitance and the second capacitance in parallel; and a third switch circuit that couples the second capacitance between a gate and the source of the first field-effect transistor.
摘要翻译：一种模拟开关电路，其包括第一场效应晶体管，其源极耦合到第一开关端子，其漏极耦合到第二开关端子; 存储电荷的第一电容; 存储电荷的第二电容; 第一开关电路，其将直流电压节点和参考电位节点之间的第一电容耦合; 第二开关电路，并联第一电容和第二电容; 以及第三开关电路，其将第二电容耦合在第一场效应晶体管的栅极和源极之间。

2. 发明申请

US20100214004A1 ANALOG SWITCH CIRCUIT 有权
标题翻译：模拟开关电路
公开(公告)号：US20100214004A1
公开(公告)日：2010-08-26
申请号：US12710543
申请日：2010-02-23
申请人： Minoru Hosoda , Mitsuo Kitamura
发明人： Minoru Hosoda , Mitsuo Kitamura
IPC分类号： H03K17/687
CPC分类号： H03K17/063 , H03K17/145 , H03K17/6877
摘要： An analog switch circuit that includes a first field-effect transistor, a source of which is coupled to a first switch terminal, and a drain of which is coupled to a second switch terminal; a first capacitance storing electric charge; a second capacitance storing electric charge; a first switch circuit that couples the first capacitance between a direct current voltage node and a reference potential node; a second switch circuit that couples the first capacitance and the second capacitance in parallel; and a third switch circuit that couples the second capacitance between a gate and the source of the first field-effect transistor.
摘要翻译：一种模拟开关电路，其包括第一场效应晶体管，其源极耦合到第一开关端子，其漏极耦合到第二开关端子; 存储电荷的第一电容; 存储电荷的第二电容; 第一开关电路，其将直流电压节点和参考电位节点之间的第一电容耦合; 第二开关电路，并联第一电容和第二电容; 以及第三开关电路，其将第二电容耦合在第一场效应晶体管的栅极和源极之间。

3. 发明申请

US20110270427A1 DIGITAL/ANALOG CONVERTOR AND DIGITAL AUDIO PROCESSING CIRCUIT ADOPTING THE SAME 审中-公开
标题翻译：数字/模拟转换器和数字音频处理电路
公开(公告)号：US20110270427A1
公开(公告)日：2011-11-03
申请号：US13069148
申请日：2011-03-22
申请人： Yuki TAKAHASHI , Mitsuo Kitamura
发明人： Yuki TAKAHASHI , Mitsuo Kitamura
IPC分类号： G06F17/00 , H03M1/82
CPC分类号： H03M3/372 , H03K5/1565 , H03M3/502
摘要： A digital analog convertor has a modulator which modulates a digital signal to generate a pulse signal having a pulse density corresponding to a digital value of the digital signal; a first RZ conversion circuit which RZ-converts the pulse signal based on a first clock signal to generate a first RZ pulse signal; a first integration circuit which integrates the first RZ pulse signal to output a first analog signal; a second RZ conversion circuit which RZ-converts a first level signal having a first level of the pulse signal based on the first clock signal to generate a second RZ pulse signal; a second integration circuit which integrates the second RZ pulse signal to output a second analog signal; and a clock duty control circuit which controls a duty ratio of the first clock signal so that the second analog signal approaches a given reference level.
摘要翻译：数字模拟转换器具有调制器，其调制数字信号以产生具有对应于数字信号的数字值的脉冲密度的脉冲信号; 第一RZ转换电路，其基于第一时钟信号RZ转换脉冲信号以产生第一RZ脉冲信号; 第一积分电路，其对第一RZ脉冲信号进行积分以输出第一模拟信号; 第二RZ转换电路，其基于所述第一时钟信号RZ转换具有所述脉冲信号的第一电平的第一电平信号，以产生第二RZ脉冲信号; 第二积分电路，其对所述第二RZ脉冲信号进行积分以输出第二模拟信号; 以及时钟占空比控制电路，其控制第一时钟信号的占空比，使得第二模拟信号接近给定的参考电平。

4. 发明授权

US06310708B1 Supervisory signal transmitter and method 失效
标题翻译：监控信号发射机和方法
公开(公告)号：US06310708B1
公开(公告)日：2001-10-30
申请号：US09044119
申请日：1998-03-19
申请人： Kenji Ota , Mitsuo Kitamura
发明人： Kenji Ota , Mitsuo Kitamura
IPC分类号： H04B1004
CPC分类号： H04J14/0298 , H04B10/0775 , H04B10/0777 , H04B2210/078 , H04J14/0221
摘要： During a time interval when a supervisory signal is not transmitted, an idle signal which is different in frequency from but substantially equal in maximum power to the supervisory signal is output. The duty ratio of the idle signal is set so that the supervisory signal and the idle signal become substantially equal to each other in average power. A transmitter is equipped with a switcher for switching between the supervisory signal and the idle signal for selective application to a laser diode. The switcher is controlled by a command signal for supervisory and control. The laser diode is driven by an output of the switcher to transmit the supervisory signal and the idle signal.
摘要翻译：在不发送监视信号的时间间隔期间，输出与监视信号的最大功率不同但基本相等的空闲信号。空闲信号的占空比被设定为使得监视信号和空闲信号在平均功率上变得基本相等。发射器配备有用于在监控信号和空闲信号之间切换的切换器，用于选择性地应用于激光二极管。切换台由用于监视和控制的命令信号控制。激光二极管由切换器的输出驱动，以发送监控信号和空闲信号。

5. 发明授权

US5859938A Optical amplifier and optical transmission system 失效
标题翻译：光放大器和光传输系统
公开(公告)号：US5859938A
公开(公告)日：1999-01-12
申请号：US770578
申请日：1996-12-19
申请人： Yoshio Nabeyama , Kazuyuki Tanikawa , Mitsuo Kitamura
发明人： Yoshio Nabeyama , Kazuyuki Tanikawa , Mitsuo Kitamura
IPC分类号： H01S3/10 , H01S3/06 , H01S3/067 , H01S3/094 , H01S3/13 , H01S3/131 , H04B10/032 , H04B10/079 , H04B10/29 , H04B10/294 , G02B6/28
CPC分类号： H04B10/2912 , H01S3/1301 , H04B10/291 , H04B10/2931 , H01S3/06754 , H01S3/09408 , H01S3/09415
摘要： An optical amplifier with redundant excitation light sources for exciting a rare earth doped optical fiber such as an EDF (Erbium Dope Fiber) minimizes the loss of the excitation light so as to introduce the excitation light to the EDF effectively, though an optical coupler, which plural optical fibers for transmitting the excitation lights from plural excitation light sources are welded, is used. And, the optical amplifier keeps the total of the excitation light introduced to the EDF at a predetermined value and changes one excitation light source to the other unless the output total from the respective excitation light sources becomes zero.
摘要翻译：具有用于激发稀土掺杂光纤（例如EDF（掺铒光纤））的冗余激发光源的光放大器使得激发光的损耗最小化，以便有效地将激发光引入EDF，尽管光耦合器使用用于透射来自多个激发光源的激发光的多个光纤被焊接。并且，光放大器将引入到EDF的激发光的总和保持在预定值，并且将一个激发光源改变为另一个，除非来自各激发光源的输出总数变为零。

6. 发明授权

US5130837A Optical repeater haivng means for preventing malfunction due to the presence of noise 失效
标题翻译：用于防止噪音存在的故障的光学重复器件
公开(公告)号：US5130837A
公开(公告)日：1992-07-14
申请号：US558432
申请日：1990-07-27
申请人： Mitsuo Kitamura , Katsumi Kikawa
发明人： Mitsuo Kitamura , Katsumi Kikawa
IPC分类号： H04B10/07 , H04B10/077 , H04B10/29
CPC分类号： H04B10/29
摘要： An optical repeater provided in an up line and a down line, the optical repeater includes a first circuit related to the up line, and a second circuit related to the down line. Each circuit includes an optical receive/decision circuit, a command extraction circuit, a command detection circuit, a command switch and a supervisory circuit. Each circuit also includes a noise component processing circuit which extracts, from the electrical signal, a noise component within a predetermined frequency range excluding a frequency of the command signal and determines whether or not the optical signal is input to the optical receive/decision circuit on the basis of the noise component and which prevents the noise component passing through the command extracting circuit from being directly applied to the command detecting circuit when it is determined that no the optical input is input to the optical receive/decision circuit. Each circuit further includes an output circuit which converts the data signal and a supervisory signal into an optical output which is transferred to a corresponding one of the up line and the down line.

7. 发明授权

US5097353A Optical repeater having phase inversion circuit 失效
标题翻译：具有相位反相电路的光电复原器
公开(公告)号：US5097353A
公开(公告)日：1992-03-17
申请号：US592365
申请日：1990-10-03
申请人： Haruo Fujiwara , Mitsuo Kitamura
发明人： Haruo Fujiwara , Mitsuo Kitamura
IPC分类号： H04B10/077 , H04B10/2507 , H04B10/29 , H04B10/524 , H04B10/54 , H04L25/02
CPC分类号： H04B10/29
摘要： An optical repeater includes a first converter converting an optical input signal into an electrical signal, an equalizing amplifier which amplifies the electrical signal and which outputs an amplified electrical signal, and a timing extraction circuit which extracts a timing signal from the amplified electrical signal. Also the optical repeater includes a phase inversion circuit which receives the amplified electrical signal in synchronism with the timing signal and which outputs a phase-inverted signal in synchronism with the timing signal. The phase-inverted signal has a phase opposite to a phase of the amplified electrical signal. Further, the optical repeater includes a second converter having a diffused laser diode and converting the phase-inverted signal into an optical output signal, and a supervisory signal extraction circuit which extracts a supervisory signal contained in the optical input signal from the phase-inverted signal. The optical input signal includes a digital signal formed of a plurality of blocks. Each block has data composed of (2m+1) bit (where m is an integer) and one-bit parity so that each block is formed of a (2m+1)B1P code having an even parity.

8. 发明授权

US5088106A Phase shift circuit and repeater using the same 失效
标题翻译：使用相位移相电路和反相器
公开(公告)号：US5088106A
公开(公告)日：1992-02-11
申请号：US490911
申请日：1990-03-09
申请人： Mitsuo Kitamura , Kazunori Hayami
发明人： Mitsuo Kitamura , Kazunori Hayami
IPC分类号： H04L7/02 , H04L7/00 , H04L25/24 , H04L25/52
CPC分类号： H04L25/242 , H04L7/00
摘要： A phase shift circuit includes a first trailing-edge elongating circuit that elongates a trailing edge of each pulse of an input clock signal so as to fall gradually and outputs a first clock signal having a first elongated fall time. A signal inversion circuit inverts the first clock signal supplied from the first trailing-edge elongating circuit and outputs an inverted version of the first clock signal. A second trailing-edge elongating circuit elongates a trailing edge of each pulse of the inverted version of the first clock signal so as to fall gradually and outputs a second clock signal having a second elongated fall time. The second clock signal is an output signal of the phase shift circuit and lags behind the input clock signal by a predetermined time based on the first and second elongated fall times. The present invention further provides a repeater which uses the above-mentioned phase shift circuit.

9. 发明授权

US4871121A Method and tank for storing a submarine optical cable 失效
标题翻译：用于存储海底光缆的方法和储罐
公开(公告)号：US4871121A
公开(公告)日：1989-10-03
申请号：US141843
申请日：1988-01-11
申请人： Kazuyuki Kodaka , Mitsuo Kitamura , Mitsuhiro Motegi
发明人： Kazuyuki Kodaka , Mitsuo Kitamura , Mitsuhiro Motegi
IPC分类号： G02B6/44
CPC分类号： G02B6/4427 , G02B6/4457
摘要： A submarine optical cable provided with optical repeaters and the like is spirally wound as a coil in a cable tank having a wall which defines at least a part of a cable storing space in which the cable is accommodated and is parallel to an axis of the coiled optical cable. A metal plate is provided along and covering an entire peripheral region of the wall to counterbalance induced voltage generated in the coiled optical cable.

10. 发明授权

US06266466B1 Optical amplifier and optical transmission system 有权
标题翻译：光放大器和光传输系统
公开(公告)号：US06266466B1
公开(公告)日：2001-07-24
申请号：US09177119
申请日：1998-10-22
申请人： Yoshio Nabeyama , Kazuyuki Tanikawa , Mitsuo Kitamura
发明人： Yoshio Nabeyama , Kazuyuki Tanikawa , Mitsuo Kitamura
IPC分类号： G02B628
CPC分类号： H04B10/2912 , H01S3/06754 , H01S3/09408 , H01S3/09415 , H01S3/1301 , H04B10/291 , H04B10/2931
摘要： An optical amplifier with redundant excitation light sources for exciting a rare earth doped optical fiber such as an EDF (Erbium Dope Fiber) minimizes the loss of the excitation light so as to introduce the excitation light to the EDF effectively, though an optical coupler, which plural optical fibers for transmitting the excitation lights from plural excitation light sources are welded, is used. And, the optical amplifier keeps the total of the excitation light introduced to the EDF at a predetermined value and changes one excitation light source to the other unless the output total from the respective excitation light sources becomes zero.
摘要翻译：具有用于激发稀土掺杂光纤（例如EDF（掺铒光纤））的冗余激发光源的光放大器使得激发光的损耗最小化，以便有效地将激发光引入EDF，尽管光耦合器使用用于透射来自多个激发光源的激发光的多个光纤被焊接。并且，光放大器将引入到EDF的激发光的总和保持在预定值，并且将一个激发光源改变为另一个，除非来自各激发光源的输出总数变为零。

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