公开(公告)号：US5652425A

公开(公告)日：1997-07-29

申请号：US555641

申请日：1995-11-08

申请人： Sosaku Sawada ,  Takeshi Sekiguchi ,  Nobuo Shiga

发明人： Sosaku Sawada ,  Takeshi Sekiguchi ,  Nobuo Shiga

IPC分类号： G02B6/42 ,  H01L31/02 ,  H03F3/08 ,  H01J40/14

CPC分类号： H03F3/087 ,  H03F3/082 ,  H01L2224/48137 ,  H01L2224/48195 ,  H01L2924/3011 ,  Y10S367/901

摘要： It is an object of present invention to provide a low-cost photoelectric conversion module in which a signal for compensating noise caused by changes in temperature and variations in power supply is obtained. In the photoelectric conversion module according to the present invention, a first amplifier having an input terminal connected to the anode of a light-receiving element for converting an optical signal into an electrical signal amplifies the electrical signal to obtain an amplified signal. A second amplifier having an input terminal connected to one electrode of a capacitor outputs an amplified signal for compensating noise of the electrical signal amplified by the first amplifier. The other electrode of the capacitor is connected to the cathode of the light-receiving element. The capacitor has a capacitance value equal to the capacitance of the light-receiving element.

摘要翻译： 本发明的目的是提供一种低成本的光电转换模块，其中获得用于补偿因温度变化引起的噪声和供电变化的信号。 在根据本发明的光电转换模块中，具有连接到用于将光信号转换为电信号的光接收元件的阳极的输入端的第一放大器放大电信号以获得放大信号。 具有连接到电容器的一个电极的输入端的第二放大器输出用于补偿由第一放大器放大的电信号的噪声的放大信号。 电容器的另一个电极连接到光接收元件的阴极。 电容器的电容值等于光接收元件的电容。

公开(公告)号：US20120018622A1

公开(公告)日：2012-01-26

申请号：US13180752

申请日：2011-07-12

申请人： Yoshiyuki SUGIMOTO ,  Sosaku Sawada ,  Taizo Tatsumi

发明人： Yoshiyuki SUGIMOTO ,  Sosaku Sawada ,  Taizo Tatsumi

IPC分类号： H03F3/08 ,  H03F3/45

CPC分类号： H03F3/45098 ,  H03F3/08 ,  H03F3/087 ,  H03F3/45103 ,  H03F3/45475 ,  H03F2203/45138 ,  H03F2203/45302 ,  H03F2203/45702 ,  H03G3/3084

摘要： A differential circuit with a function of a variable gain without shifting the output cross point is disclosed. The differential circuit includes an amplifying stage and a control stage. The amplifying stage includes three units each having a pair of transistors, a pair of load resistors, and a pair of current sources. The second and third units each put between the first unit and the load resistor to bypass the current. The control stage includes two units and two current sources to compensate the current bypassed by the second or third unit to keep the DC output level substantially in constant.

摘要翻译： 公开了具有可变增益的功能而不移动输出交叉点的差分电路。 差分电路包括放大级和控制级。 放大级包括三个单元，每个具有一对晶体管，一对负载电阻和一对电流源。 第二和第三单元分别放在第一单元和负载电阻之间绕过电流。 控制级包括两个单元和两个电流源，以补偿由第​​二或第三单元旁路的电流，以保持DC输出电平基本上恒定。

公开(公告)号：US07585120B2

公开(公告)日：2009-09-08

申请号：US11362792

申请日：2006-02-28

申请人： Makoto Ito ,  Sosaku Sawada

发明人： Makoto Ito ,  Sosaku Sawada

IPC分类号： G02B6/36 ,  G02B6/26 ,  G02B6/42

CPC分类号： G02B6/4227 ,  G02B6/4204

摘要： An optical device includes: a first optical component that has an end face oblique with respect to a plane perpendicular to an optical axis; a second optical component that is optically coupled to the first optical component; and a lens that is placed between the first optical component and the second optical component, and is positioned so that the trajectory of a focal point formed when the first optical component and the second optical component rotate relative to each other falls within a valid region on the surface of the second optical component.

摘要翻译： 光学装置包括：第一光学部件，其具有相对于垂直于光轴的平面倾斜的端面; 光学耦合到第一光学部件的第二光学部件; 以及放置在第一光学部件和第二光学部件之间的透镜，并且被定位成使得当第一光学部件和第二光学部件相对于彼此旋转时形成的焦点的轨迹落在有效区域内 第二光学部件的表面。

公开(公告)号：US07579915B2

公开(公告)日：2009-08-25

申请号：US11727960

申请日：2007-03-29

申请人： Taizou Tatsumi ,  Sosaku Sawada

发明人： Taizou Tatsumi ,  Sosaku Sawada

IPC分类号： H03F3/08

CPC分类号： H03F3/087 ,  H03F1/08 ,  H03F2200/78

摘要： An electronic circuit includes: a control circuit that controls the gain of a transimpedance amplifier by taking part of an input current to be input to the transimpedance amplifier, based on the output voltage of the transimpedance amplifier; and a PIN diode that is provided between an input of the transimpedance amplifier and the control circuit, and is connected in the forward direction with respect to the current to be drawn into the control circuit.

摘要翻译： 电子电路包括：控制电路，其基于所述跨阻抗放大器的输出电压，通过将输入到所述跨阻抗放大器的一部分输入电流控制跨阻抗放大器的增益; 以及PIN二极管，其设置在跨阻放大器的输入端和控制电路之间，并且相对于要吸入控制电路的电流在正向方向上连接。

公开(公告)号：US20090009246A1

公开(公告)日：2009-01-08

申请号：US12167579

申请日：2008-07-03

申请人： Hiroshi HARA ,  Sosaku SAWADA

发明人： Hiroshi HARA ,  Sosaku SAWADA

IPC分类号： H03F3/45

CPC分类号： H03F3/45475 ,  H03F1/08 ,  H03F3/087 ,  H03F2203/45138 ,  H03F2203/45618

摘要： An electronic circuit includes a differential amplifier circuit, a first smoothing circuit, a second smoothing circuit and a first switch. The differential amplifier circuit receives a digital input signal and a reference signal. The first smoothing circuit smoothes the digital input signal with a first capacitance value. The second smoothing circuit smoothes the digital input signal with a second capacitance value larger than the first capacitance value. The first switch selects one of output signals from the first smoothing circuit and the second smoothing circuit as the reference signal.

摘要翻译： 电子电路包括差分放大器电路，第一平滑电路，第二平滑电路和第一开关。 差分放大器电路接收数字输入信号和参考信号。 第一平滑电路以第一电容值平滑数字输入信号。 第二平滑电路以大于第一电容值的第二电容值平滑数字输入信号。 第一开关选择来自第一平滑电路和第二平滑电路的输出信号之一作为参考信号。

公开(公告)号：US20060193568A1

公开(公告)日：2006-08-31

申请号：US11362792

申请日：2006-02-28

申请人： Makoto Ito ,  Sosaku Sawada

发明人： Makoto Ito ,  Sosaku Sawada

IPC分类号： G02B6/36

CPC分类号： G02B6/4227 ,  G02B6/4204

摘要： An optical device includes: a first optical component that has an end face oblique with respect to a plane perpendicular to an optical axis; a second optical component that is optically coupled to the first optical component; and a lens that is placed between the first optical component and the second optical component, and is positioned so that the trajectory of a focal point formed when the first optical component and the second optical component rotate relative to each other falls within a valid region on the surface of the second optical component.

公开(公告)号：US5742480A

公开(公告)日：1998-04-21

申请号：US552351

申请日：1995-11-02

申请人： Sosaku Sawada ,  Ryoji Sakamoto ,  Hiromi Kurashima ,  Daisuke Takagi ,  Satoshi Ohe ,  Takeshi Sekiguchi ,  Nobuo Shiga

发明人： Sosaku Sawada ,  Ryoji Sakamoto ,  Hiromi Kurashima ,  Daisuke Takagi ,  Satoshi Ohe ,  Takeshi Sekiguchi ,  Nobuo Shiga

IPC分类号： G02B6/42 ,  H05K1/00 ,  H05K1/11 ,  H05K1/18 ,  H05K3/00 ,  H05K3/30 ,  H05K3/34 ,  H01R9/09

CPC分类号： H05K1/189 ,  G02B6/4274 ,  G02B6/4281 ,  G02B6/4283 ,  G02B6/4245 ,  G02B6/4269 ,  H05K1/0393 ,  H05K1/118 ,  H05K2201/10151 ,  H05K2201/1034 ,  H05K2201/10446 ,  H05K2201/10636 ,  H05K2201/10651 ,  H05K2201/10689 ,  H05K2201/2009 ,  H05K3/0058 ,  H05K3/306 ,  H05K3/3447 ,  Y02P70/611

摘要： It is an object of the present invention to provide a highly reliable optical module circuit board having a sufficient mechanical strength with respect to an external stress. An optical module circuit board according to the present invention includes a flexible printed circuit having at least a multilayered structure in which a layer containing a conductive metal interconnection is sandwiched between insulating layers, wherein the flexible printed circuit includes a main body portion having the multilayered structure, a first surface mounted with an electronic component, and a second surface opposite to the first surface, a neck portion having the multilayered structure and extending from one end of the main body portion, and a head portion positioned at a distal end of the neck portion extending from the one end of the main body portion, having the multilayered structure, and mounted with an optical operation element and a bypass capacitor, Particularly, the neck portion defines the positional relationship between the main body portion and the head portion so as to give the circuit board a sufficient mechanical strength.

摘要翻译： 本发明的目的是提供一种具有足够的机械强度相对于外部应力的高度可靠的光学模块电路板。 根据本发明的光学模块电路板包括具有至少多层结构的柔性印刷电路，其中包含导电金属互连的层被夹在绝缘层之间，其中柔性印刷电路包括具有多层结构的主体部分 ，安装有电子部件的第一表面和与第一表面相对的第二表面，具有多层结构并从主体部分的一端延伸的颈部和位于颈部的远端的头部 具有多层结构的主体部分的一端延伸并安装有光操作元件和旁路电容器的部分，特别地，颈部限定主体部分和头部之间的位置关系，从而 给电路板提供足够的机械强度。

公开(公告)号：US08390383B2

公开(公告)日：2013-03-05

申请号：US13227618

申请日：2011-09-08

申请人： Hiroshi Hara ,  Sosaku Sawada

发明人： Hiroshi Hara ,  Sosaku Sawada

IPC分类号： H03F3/08

CPC分类号： H03G3/3084

摘要： An amplifier for receiving an optical signal is disclosed. The amplifier provides a response time controller including an integrator with two time constants, a linear amplifier, a hysteresis comparator, an another integrator, and a switch to change the time constant. The switch includes two voltage followers, one of which turns off the switch to set the time constant in a longer state; while, the other of which turns on the switch and reflects the input of the integrator to set the time constant in a shorter state.

摘要翻译： 公开了一种用于接收光信号的放大器。 放大器提供响应时间控制器，包括具有两个时间常数的积分器，线性放大器，迟滞比较器，另一个积分器以及改变时间常数的开关。 开关包括两个电压跟随器，其中一个关闭开关以将时间常数设置在较长的状态; 而另一个则打开开关并反映积分器的输入，以将时间常数设置在较短的状态。

公开(公告)号：US06257773B1

公开(公告)日：2001-07-10

申请号：US09251929

申请日：1999-02-18

申请人： Yutaka Moriyama ,  Sosaku Sawada

发明人： Yutaka Moriyama ,  Sosaku Sawada

IPC分类号： G02B636

CPC分类号： G02B6/4292 ,  G02B6/4204 ,  G02B6/4214 ,  G02B6/4244 ,  G02B6/4255 ,  G02B6/4265

摘要： The present invention provides an optical module, in which aligning adjustment is much easier than conventional module while a high optical coupling efficiency between an optical fiber and a semiconductor device is maintained. The module comprises a structure for effectively suppressing the decrease in optical coupling efficiency caused by changes in ambient temperature. The optical module comprises an optical reflecting member having a reflecting surface with a concave surface form for optically coupling the optical fiber and the semiconductor device to each other, and a deterioration-suppressing structure in which the change in shape of the reflecting member caused by changes in ambient temperature effectively suppresses the deterioration in optical coupling state between the optical fiber and semiconductor device due to changes in temperature or the like.

摘要翻译： 本发明提供了一种光学模块，其中对准调整比常规模块容易得多，同时维持光纤和半导体器件之间的高光耦合效率。 该模块包括用于有效地抑制由环境温度变化引起的光耦合效率降低的结构。 光学模块包括光反射部件，其具有用于将光纤和半导体器件彼此光学耦合的凹面形状的反射面，以及由变化引起的反射部件的形状变化的劣化抑制结构 在环境温度下，由于温度等的变化，有效地抑制了光纤与半导体器件之间的光耦合状态的劣化。

公开(公告)号：US6004046A

公开(公告)日：1999-12-21

申请号：US982036

申请日：1997-12-01

申请人： Sosaku Sawada

发明人： Sosaku Sawada

IPC分类号： G02B6/42 ,  G02B6/36

CPC分类号： G02B6/4214 ,  G02B6/4225 ,  G02B6/4248 ,  G02B6/4204 ,  G02B6/4207 ,  G02B6/4226

摘要： The present invention relates to an optical module having a configuration in which centering adjustment can be effected much more easily than the prior art, while keeping a high optical coupling efficiency between an optical fiber and a semiconductor device, and can reduce the number of parts, for example; and a method of making the same. The optical module comprises, as an element for optically coupling the optical fiber and the semiconductor device together, an optical reflecting member having a concave reflecting surface. Since it is necessary for the reflecting member to be positioned with a high accuracy in the field of optical communications to which this optical module is supposed to be utilized, in particular, the reflecting member is provided with a specific positioning configuration.

摘要翻译： 本发明涉及一种具有这样一种结构的光学模块，其中在保持光纤和半导体器件之间的高光耦合效率的同时，可以比现有技术更容易地实现对中调节，并且可以减少部件的数量， 例如; 以及制作相同的方法。 光学模块包括作为用于将光纤和半导体器件光学耦合在一起的元件，具有凹入的反射表面的光学反射部件。 由于反射构件必须在应用该光模块的光通信领域中高精度地定位，特别是反射构件具有特定的定位构造。