公开(公告)号：US07298977B2

公开(公告)日：2007-11-20

申请号：US10496687

申请日：2002-11-28

申请人： Katsuichi Ohsawa ,  Toyoyuki Shimazaki ,  Tetsuo Chato ,  Yuzo Shimizu ,  Kenji Imaizumi

发明人： Katsuichi Ohsawa ,  Toyoyuki Shimazaki ,  Tetsuo Chato ,  Yuzo Shimizu ,  Kenji Imaizumi

IPC分类号： H04B10/04 ,  H04B10/12 ,  G01J1/32 ,  H01S3/13

CPC分类号： H04B10/504

摘要： The present invention is intended to prevent a light-emitting diode from emitting light continuously in the case when the level at an input terminal is fixed high because of software or the like and to avoid various problems, such as battery exhaustion and breakdown of the light-emitting diode, in PDAs, cellular phones, etc. For these purposes, a high-pass filter 21 for passing the high-frequency components of an optical transmission input signal having a pulse waveform and a binary circuit 22 for binarizing the output signal of the high-pass filter 21 so as to be returned to a pulse waveform are provided in the preceding stage of a light-emitting device driving circuit 23 for driving a light-emitting diode 8 for optical transmission.

摘要翻译： 本发明是为了防止发光二极管由于软件等而在输入端子的电平固定为高的情况下连续地发光，并且避免诸如电池耗尽和光的破坏等各种问题 用于PDA，蜂窝电话等。为了这些目的，高通滤波器21用于使具有脉冲波形的光传输输入信号的高频分量和二进制电路22二值化，以将 在用于驱动用于光传输的发光二极管8的发光装置驱动电路23的前级中设置高通滤波器21以返回到脉冲波形。

公开(公告)号：US20050063710A1

公开(公告)日：2005-03-24

申请号：US10496687

申请日：2002-11-28

申请人： Katsuichi Ohsawa ,  Toyoyuki Shimazaki ,  Tetsuo Chato ,  Yuzo Shimizu ,  Kenji Imaizumi

发明人： Katsuichi Ohsawa ,  Toyoyuki Shimazaki ,  Tetsuo Chato ,  Yuzo Shimizu ,  Kenji Imaizumi

IPC分类号： H04B1/04 ,  H04B10/40 ,  H04B10/50 ,  H04B10/524 ,  H04B10/60 ,  H04B10/04 ,  H04B10/12

CPC分类号： H04B10/504

摘要： The present invention is intended to prevent a light-emitting diode from emitting light continuously in the case when the level at an input terminal is fixed high because of software or the like and to avoid various problems, such as battery exhaustion and breakdown of the light-emitting diode, in PDAs, cellular phones, etc. For these purposes, a high-pass filter 21 for passing the high-frequency components of an optical transmission input signal having a pulse waveform and a binary circuit 22 for binarizing the output signal of the high-pass filter 21 so as to be returned to a pulse waveform are provided in the preceding stage of a light-emitting device driving circuit 23 for driving a light-emitting diode 8 for optical transmission.

摘要翻译： 本发明是为了防止发光二极管由于软件等而在输入端子的电平固定为高的情况下连续地发光，并且避免诸如电池耗尽和光的破坏等各种问题 用于PDA，蜂窝电话等。为了这些目的，高通滤波器21用于使具有脉冲波形的光传输输入信号的高频分量和二进制电路22二值化，以将 在用于驱动用于光传输的发光二极管8的发光装置驱动电路23的前级中设置高通滤波器21以返回到脉冲波形。

公开(公告)号：US07470886B2

公开(公告)日：2008-12-30

申请号：US11328139

申请日：2006-01-10

申请人： Yuzo Shimizu ,  Hisatada Yasukawa ,  Shinichi Hamaguchi ,  Kenji Imaizumi ,  Shinichi Miyamoto ,  Yosuke Kuroiwa

发明人： Yuzo Shimizu ,  Hisatada Yasukawa ,  Shinichi Hamaguchi ,  Kenji Imaizumi ,  Shinichi Miyamoto ,  Yosuke Kuroiwa

IPC分类号： H03F3/08

CPC分类号： H01S5/0264 ,  H01S5/0683

摘要： There is provided a light receiving circuit capable of preventing an output variation of the light receiving circuit due to a change in ambient temperature with a simple configuration.The light receiving circuit is provided with a photodiode 4 for LD power monitoring and an I-V amplifier 5 connected with a feedback resistor 13, wherein a light receiving section 16 of the photodiode 4 is covered with a protective film 19. Temperature dependences between a light transmittance of the protective film 19 in accordance-with a shift of a wavelength of a laser beam due to a change in ambient temperature, and a resistance value of the feedback resistor 13 are set in such a way that they may be mutually compensated and an output voltage from the light receiving circuit may be constant for a temperature change.

摘要翻译： 提供了一种能够以简单的结构防止由于环境温度的变化而导致的光接收电路的输出变化的光接收电路。 光接收电路设置有用于LD功率监测的光电二极管4和与反馈电阻13连接的IV放大器5，其中光电二极管4的光接收部分16被保护膜19覆盖。光透射率 根据环境温度变化引起的激光束的波长偏移和反馈电阻器13的电阻值的设定，使得它们可以相互补偿并输出 来自光接收电路的电压对于温度变化可以是恒定的。

公开(公告)号：US20060233207A1

公开(公告)日：2006-10-19

申请号：US11328139

申请日：2006-01-10

申请人： Yuzo Shimizu ,  Hisatada Yasukawa ,  Shinichi Hamaguchi ,  Kenji Imaizumi ,  Shinichi Miyamoto ,  Yosuke Kuroiwa

发明人： Yuzo Shimizu ,  Hisatada Yasukawa ,  Shinichi Hamaguchi ,  Kenji Imaizumi ,  Shinichi Miyamoto ,  Yosuke Kuroiwa

IPC分类号： H01S3/13

CPC分类号： H01S5/0264 ,  H01S5/0683

摘要： There is provided a light receiving circuit capable of preventing an output variation of the light receiving circuit due to a change in ambient temperature with a simple configuration. The light receiving circuit is provided with a photodiode 4 for LD power monitoring and an I-V amplifier 5 connected with a feedback resistor 13, wherein a light receiving section 16 of the photodiode 4 is covered with a protective film 19. Temperature dependences between a light transmittance of the protective film 19 in accordance-with a shift of a wavelength of a laser beam due to a change in ambient temperature, and a resistance value of the feedback resistor 13 are set in such a way that they may be mutually compensated and an output voltage from the light receiving circuit may be constant for a temperature change.

摘要翻译： 提供了一种能够以简单的结构防止由于环境温度的变化而导致的光接收电路的输出变化的光接收电路。 光接收电路设置有用于LD功率监测的光电二极管4和与反馈电阻13连接的I-V放大器5，其中光电二极管4的光接收部分16被保护膜19覆盖。 根据环境温度变化引起的激光束的波长偏移和反馈电阻13的电阻值，保护膜19的透光率之间的温度依赖性被设定为使得它们可以 相互补偿，并且来自光接收电路的输出电压对于温度变化可以是恒定的。

公开(公告)号：US20060103472A1

公开(公告)日：2006-05-18

申请号：US11266323

申请日：2005-11-04

申请人： Hideo Fukuda ,  Kenji Imaizumi

发明人： Hideo Fukuda ,  Kenji Imaizumi

IPC分类号： H03F3/08

CPC分类号： H03F3/08 ,  H03F1/34

摘要： A light receiving amplification circuit according to the present invention includes: a light receiving element (101); an amplification circuit which amplifies a photoelectric current generated by the light receiving element and outputs from an amplification stage for external output (117) and a plurality of amplification stages for feedback (109 and 113); an operating current source (111, 115, and 118) set in each of the amplification stages which supplies an operating current to the corresponding amplification stages; a gain selection switch (110 and 114) set in the respective plurality of amplification stages for feedback, which interrupts the operating current between the corresponding amplification stage and the operating current source; and a gain resistor (119 and 120) set in the respective plurality of amplification stages for feedback and connected between the operating current side of the corresponding gain selection switch and an input of the amplification circuit.

摘要翻译： 根据本发明的光接收放大电路包括：光接收元件（101）; 放大电路，其放大由所述受光元件产生的光电流，并从用于外部输出的放大级（117）和多个用于反馈的放大级（109和113）输出; 设置在每个放大级中的工作电流源（111,115和118），其向相应的放大级提供工作电流; 设置在相应的多个放大级中用于反馈的增益选择开关（110和114），其中断相应的放大级与工作电流源之间的工作电流; 以及设置在相应的多个放大级中用于反馈并连接在相应的增益选择开关的工作电流侧和放大电路的输入之间的增益电阻器（119和120）。

公开(公告)号：US07245188B2

公开(公告)日：2007-07-17

申请号：US11266323

申请日：2005-11-04

申请人： Hideo Fukuda ,  Kenji Imaizumi

发明人： Hideo Fukuda ,  Kenji Imaizumi

IPC分类号： H03F3/08

CPC分类号： H03F3/08 ,  H03F1/34

摘要： A light receiving amplification circuit according to the present invention includes: a light receiving element; an amplification circuit which amplifies a photoelectric current generated by the light receiving element and outputs from an amplification stage for external output and a plurality of amplification stages for feedback; an operating current source set in each of the amplification stages which supplies an operating current to the corresponding amplification stages; a gain selection switch set in the respective plurality of amplification stages for feedback, which interrupts the operating current between the corresponding amplification stage and the operating current source; and a gain resistor set in the respective plurality of amplification stages for feedback and connected between the operating current side of the corresponding gain selection switch and an input of the amplification circuit.

摘要翻译： 根据本发明的光接收放大电路包括：光接收元件; 放大电路，其放大由所述受光元件产生的光电流并从用于外部输出的放大级输出，以及多个用于反馈的放大级; 在每个放大级中设置的工作电流源，其向相应的放大级提供工作电流; 设置在相应的多个放大级中用于反馈的增益选择开关，其中断相应的放大级与工作电流源之间的工作电流; 以及在所述多个放大级中设置的用于反馈并连接在所述相应的增益选择开关的工作电流侧和所述放大电路的输入端之间的增益电阻器。