公开(公告)号：US20060011815A1

公开(公告)日：2006-01-19

申请号：US11180710

申请日：2005-07-14

申请人： Motohiko Yamamoto ,  Takanori Okuda

发明人： Motohiko Yamamoto ,  Takanori Okuda

IPC分类号： H03F3/08

CPC分类号： H03F3/087 ,  H01L31/101

摘要： A feedback resistor of a feedback circuit included in a photo-receiving amplifier element is formed on an island region in which an electric potential is in a floating state. The island region is electrically isolated from an island region on which an element other than the feedback resistor is formed. This enables the response speed of the photo-receiving amplifier element to be increased without changing the process of the circuit or varying a resistance value of the feedback resistor in a first-stage amplifier unit.

摘要翻译： 包括在光接收放大器元件中的反馈电路的反馈电阻器形成在电位处于浮置状态的岛区上。 岛区域与形成有反馈电阻器以外的元件的岛区电隔离。 这使得能够在不改变电路的处理或改变第一级放大器单元中的反馈电阻器的电阻值的情况下增加光接收放大器元件的响应速度。

公开(公告)号：US07304542B2

公开(公告)日：2007-12-04

申请号：US11180710

申请日：2005-07-14

申请人： Motohiko Yamamoto ,  Takanori Okuda

发明人： Motohiko Yamamoto ,  Takanori Okuda

IPC分类号： H03F3/08

CPC分类号： H03F3/087 ,  H01L31/101

摘要： A feedback resistor of a feedback circuit included in a photo-receiving amplifier element is formed on an island region in which an electric potential is in a floating state. The island region is electrically isolated from an island region on which an element other than the feedback resistor is formed. This enables the response speed of the photo-receiving amplifier element to be increased without changing the process of the circuit or varying a resistance value of the feedback resistor in a first-stage amplifier unit.

摘要翻译： 包括在光接收放大器元件中的反馈电路的反馈电阻器形成在电位处于浮置状态的岛区上。 岛区域与形成有反馈电阻器以外的元件的岛区电隔离。 这使得能够在不改变电路的处理或改变第一级放大器单元中的反馈电阻器的电阻值的情况下增加光接收放大器元件的响应速度。

公开(公告)号：US07002881B2

公开(公告)日：2006-02-21

申请号：US10461596

申请日：2003-06-12

申请人： Takanori Okuda ,  Masaya Ohnishi

发明人： Takanori Okuda ,  Masaya Ohnishi

IPC分类号： G11B7/00

CPC分类号： G11B7/131 ,  G11B7/005 ,  G11B7/1275 ,  G11B2007/0006

摘要： The object of the invention is to provide a light receiving amplification element applicable to an optical pickup apparatus comprising a semiconductor two-wavelength laser element and one condensing lens. The light receiving amplification element is provided with a plurality of light receiving portions corresponding to different wavelengths, a plurality of trans-impedance type amplifiers connected to the light receiving portions according to the different wavelengths and adaptable to the different wavelengths and switching portion for switching output from the trans-impedance type amplifier according to each of the wavelengths.

公开(公告)号：US6147533A

公开(公告)日：2000-11-14

申请号：US135686

申请日：1998-08-18

申请人： Takanori Okuda ,  Naruichi Yokogawa ,  Takayuki Shimizu ,  Fumitaka Nakamura

发明人： Takanori Okuda ,  Naruichi Yokogawa ,  Takayuki Shimizu ,  Fumitaka Nakamura

IPC分类号： H03F3/08 ,  H03F3/30 ,  H03F3/45 ,  H03K5/08 ,  H03K5/12

CPC分类号： H03F3/3066 ,  H03F3/08 ,  H03F3/087 ,  H03F3/3088 ,  H03F3/45112 ,  H03F3/45982 ,  H03K5/082 ,  H03F2203/45544 ,  H03F2203/45631

摘要： A data communication receiving element includes a photo-receiving element for receiving an external light signal and for converting the light signal to a current signal. It further includes an amplifier circuit for amplifying the current signal after converting the current signal to a voltage signal. A waveform shaping circuit is included for shaping an output voltage waveform from the amplifier circuit to a substantially square pulse. Finally, an integrator is included for converting the substantially square pulse to a non-square pulse. This is achieved by extending a rising time necessary for shifting the substantially square pulse from a low potential level to a high potential level, and by extending a falling time necessary for shifting the substantially square pulse from the high potential level to the low potential level. As such, deterioration of an S/N ratio is suppressed.

摘要翻译： 数据通信接收元件包括用于接收外部光信号并将光信号转换为电流信号的光接收元件。 它还包括放大器电路，用于在将电流信号转换成电压信号之后放大电流信号。 包括波形整形电路，用于将来自放大器电路的输出电压波形整形为基本平方的脉冲。 最后，包括用于将基本上方波的脉冲转换成非方波脉冲的积分器。 这是通过将基本上平方脉冲从低电位电平移位到高电位电平所需的上升时间，并且通过延长将基本上平方脉冲从高电位电平移位到低电位电平所需的下降时间来实现的。 因此，S / N比的劣化被抑制。

公开(公告)号：US07263046B2

公开(公告)日：2007-08-28

申请号：US11523017

申请日：2006-09-19

申请人： Takanori Okuda ,  Takashi Yokoyama

发明人： Takanori Okuda ,  Takashi Yokoyama

IPC分类号： G11B7/00 ,  H01L31/00

CPC分类号： G11B7/005 ,  G11B7/0045 ,  G11B7/13

摘要： A two-stage amplifier of a first-stage amplifier 21 and second-stage amplifiers 22 and 23 is provided. A writing mode and reproducing modes are switched in the first-stage amplifier 21 by switching a parallel circuit of a feedback capacitor Cf1w and a feedback resistor Rf1w and a parallel circuit of a feedback capacitor Cf1r and a feedback resistor Rf1r. The second-stage amplifier 23 is provided with feedback resistors Rf22 and Rf23 that are connected to each other in parallel. The feedback resistor Rf23 is connected in the feedback loop by a switch transistor QSW only when reproducing a high-reflective disk. This enables an amplifier gain to be suitably set for each of writing, low-reflective disk reproducing, and high-reflective disk reproducing. As a result, desirable reproducing characteristics can be obtained for the low-reflective disk while accommodating high-speed writing with a large laser power.

摘要翻译： 提供了第一级放大器21和第二级放大器22和23的两级放大器。 通过切换反馈电容器Cf 1 w和反馈电阻器Rf 1 w的并联电路以及反馈电容器Cf 1 r的并联电路和反馈电阻器Rf的并联电路，在第一级放大器21中切换写入模式和再现模式 1 r。 第二级放大器23设置有并联连接的反馈电阻器Rf 22和Rf 23。 只有在再现高反射盘时，反馈电阻Rf 23才被开关晶体管QSW连接在反馈回路中。 这使得能够针对写入，低反射盘再现和高反射盘再现中的每一个适当地设置放大器增益。 结果，对于低反射盘可以获得期望的再现特性，同时以大的激光功率容纳高速写入。

公开(公告)号：US20070019517A1

公开(公告)日：2007-01-25

申请号：US11523017

申请日：2006-09-19

申请人： Takanori Okuda ,  Takashi Yokoyama

发明人： Takanori Okuda ,  Takashi Yokoyama

IPC分类号： G11B7/00

CPC分类号： G11B7/005 ,  G11B7/0045 ,  G11B7/13

摘要： A two-stage amplifier of a first-stage amplifier 21 and second-stage amplifiers 22 and 23 is provided. A writing mode and reproducing modes are switched in the first-stage amplifier 21 by switching a parallel circuit of a feedback capacitor Cf1w and a feedback resistor Rf1w and a parallel circuit of a feedback capacitor Cf1r and a feedback resistor Rf1r. The second-stage amplifier 23 is provided with feedback resistors Rf22 and Rf23 that are connected to each other in parallel. The feedback resistor Rf23 is connected in the feedback loop by a switch transistor QSW only when reproducing a high-reflective disk. This enables an amplifier gain to be suitably set for each of writing, low-reflective disk reproducing, and high-reflective disk reproducing. As a result, desirable reproducing characteristics can be obtained for the low-reflective disk while accommodating high-speed writing with a large laser power.

公开(公告)号：US07133346B2

公开(公告)日：2006-11-07

申请号：US10294573

申请日：2002-11-15

申请人： Takanori Okuda ,  Takashi Yokoyama

发明人： Takanori Okuda ,  Takashi Yokoyama

IPC分类号： G11B7/00 ,  H01L31/00

CPC分类号： G11B7/005 ,  G11B7/0045 ,  G11B7/13

摘要： A two-stage amplifier of a first-stage amplifier 21 and second-stage amplifiers 22 and 23 is provided. A writing mode and reproducing modes are switched in the first-stage amplifier 21 by switching a parallel circuit of a feedback capacitor Cf1w and a feedback resistor Rf1w and a parallel circuit of a feedback capacitor Cf1r and a feedback resistor Rf1r. The second-stage amplifier 23 is provided with feedback resistors Rf22 and Rf23 that are connected to each other in parallel. The feedback resistor Rf23 is connected in the feedback loop by a switch transistor QSW only when reproducing a high-reflective disk. This enables an amplifier gain to be suitably set for each of writing, low-reflective disk reproducing, and high-reflective disk reproducing. As a result, desirable reproducing characteristics can be obtained for the low-reflective disk while accommodating high-speed writing with a large laser power.

摘要翻译： 提供了第一级放大器21和第二级放大器22和23的两级放大器。 通过切换反馈电容器Cf 1 w和反馈电阻器Rf 1 w的并联电路以及反馈电容器Cf 1 r的并联电路和反馈电阻器Rf的并联电路，在第一级放大器21中切换写入模式和再现模式 1 r。 第二级放大器23设置有并联连接的反馈电阻器Rf 22和Rf 23。 只有在再现高反射盘时，反馈电阻Rf 23才被开关晶体管QSW连接在反馈回路中。 这使得能够针对写入，低反射盘再现和高反射盘再现中的每一个适当地设置放大器增益。 结果，对于低反射盘可以获得期望的再现特性，同时以大的激光功率容纳高速写入。

公开(公告)号：US06480311B1

公开(公告)日：2002-11-12

申请号：US09132898

申请日：1998-08-12

申请人： Takanori Okuda ,  Naruichi Yokogawa

发明人： Takanori Okuda ,  Naruichi Yokogawa

IPC分类号： H04B1024

CPC分类号： H03K5/1532 ,  H03G3/3084 ,  H03K5/084

摘要： In a peak-hold circuit, a hold capacitor captures the peak value of an input signal and a reset section carries out a resetting operation on the holding value of the hold capacitor when, upon switching inputs, it receives a reset signal. The reset section, upon receipt of the reset signal, improves the response speed of a peak-hold section by a predetermined time period. The reset section is provided with a constant current circuit and a switching circuit for respectively increasing a charging current and a discharging current of the peak-hold section.

摘要翻译： 在峰值保持电路中，保持电容器捕获输入信号的峰值，并且当切换输入时，复位部分接收到复位信号，对保持电容器的保持值执行复位操作。 复位部分在接收到复位信号时，将峰值保持部分的响应速度提高预定时间段。 复位部分设置有用于分别增加峰值保持部分的充电电流和放电电流的恒流电路和开关电路。

公开(公告)号：US6137101A

公开(公告)日：2000-10-24

申请号：US132412

申请日：1998-08-11

申请人： Naruichi Yokogawa ,  Takanori Okuda ,  Takayuki Shimizu

发明人： Naruichi Yokogawa ,  Takanori Okuda ,  Takayuki Shimizu

IPC分类号： H03F3/08 ,  H04B10/116 ,  H04B10/40 ,  H04B10/50 ,  H04B10/60 ,  H01J40/14

CPC分类号： H04B10/114

摘要： A light receiving amplifying device includes a light receiving device for outputting a light signal current which varies with a quantity of received light, a load resistor connected with the light receiving device in series, for generating a detected voltage which varies with the light signal current, and a low frequency current bypass circuit for preventing the detected voltage from being saturated when the detected voltage has a frequency in a low frequency band. The low frequency current bypass circuit is connected with the load resistor in parallel and has an input impedance varying with a frequency of the detected voltage. The device further includes a transimpedance amplifying circuit (inverting amplifying circuit) for transforming an impedance of the detected voltage, and a capacitor for coupling the low frequency current bypass circuit and the transimpedance amplifying circuit (inverting amplifying circuit). This makes it possible, with a relatively simple circuit and arrangement in an infrared communication receiver, to lower noises of the light receiving amplifying device while maintaining an operational range with respect to a DC photoelectric current.

摘要翻译： 光接收放大装置包括：光接收装置，用于输出随接收光量变化的光信号电流;串联连接光负载电阻器的负载电阻，用于产生随光信号电流变化的检测电压; 以及低频电流旁路电路，用于当检测电压具有低频带中的频率时，防止检测电压饱和。 低频电流旁路电路与负载电阻并联连接，输入阻抗随检测电压的频率而变化。 该装置还包括用于变换检测电压的阻抗的跨阻放大电路（反相放大电路），以及用于耦合低频电流旁路电路和跨阻放大电路（反相放大电路）的电容器。 这使得在红外线通信接收机中相对简单的电路和布置可以在保持相对于DC光电流的操作范围的同时降低光接收放大装置的噪声。