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21. 发明专利

JP2009534778A Elimination of the dummy detector in an optical detector using the input common-mode feedback 审中-公开
公开(公告)号：JP2009534778A
公开(公告)日：2009-09-24
申请号：JP2009500539
申请日：2007-02-20
申请人：イグザーコーポレイション
发明人：リチャードダブリューランドレット
IPC分类号： G11B7/125 , G11B7/13 , H03F3/08
CPC分类号： H03F3/087 , H03F1/08 , H03F3/45475 , H03F3/45928 , H03F3/45941 , H03F2203/45061 , H03F2203/45078 , H03F2203/45424 , H03F2203/45561
摘要：参照電圧は増幅器への入力において定電圧を印加する。その結果、増幅器の非アクティブな入力上のダミー検出器の必要性を排除する。

22. 发明专利

JP2009206823A Dc current removing circuit 有权
标题翻译：直流电流消除电路
公开(公告)号：JP2009206823A
公开(公告)日：2009-09-10
申请号：JP2008046891
申请日：2008-02-27
申请人： Canon Inc , キヤノン株式会社
发明人： ISODA NAOKI
IPC分类号： H03F3/34
CPC分类号： H03H11/245 , H03F3/087
摘要： PROBLEM TO BE SOLVED: To promptly perform clamp without increasing costs of a chip and a package irrespective of levels of DC components, and furthermore, even when the DC current removing circuit is formed on a semiconductor substrate in a circuit which reduces the DC components from current in which AC components and the DC components are superimposed. SOLUTION: The DC current removing circuit which reduces a DC component in an output current of a current output element in which an AC current I2 and a DC current I1 are superimposed includes: low-pass filters 3, 5, and C1 for extracting a current component of a frequency lower than a cutoff frequency from the output current, and a removing unit that removes the extracted current component from the output current. The low-pass filter has a frequency changing units 3 and 7 that change the cutoff frequency from higher to lower as a continuous function over time. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：无论DC分量的水平如何，都可以及时执行钳位而不增加芯片和封装的成本，此外，即使当DC电流去除电路形成在电路中的半导体衬底上，交流分量和直流分量叠加的电流的直流分量。解决方案：降低其中交流电流I2和直流电流I1叠加的电流输出元件的输出电流中的直流分量的直流电流消除电路包括：低通滤波器3,5和C1，用于从输出电流提取低于截止频率的频率的电流分量;以及去除单元，其从所述输出电流中去除所提取的电流分量。低通滤波器具有频率改变单元3和7，其将截止频率从较高变为较低，作为连续功能随时间变化。版权所有（C）2009，JPO＆INPIT

23. 发明专利

JP2008211376A Electronic circuit and communication system 有权
标题翻译：电子电路与通信系统
公开(公告)号：JP2008211376A
公开(公告)日：2008-09-11
申请号：JP2007044468
申请日：2007-02-23
申请人： Eudyna Devices Inc , ユーディナデバイス株式会社
发明人： HARA HIROSHI
IPC分类号： H03F3/08 , H03F3/34 , H04B10/00
CPC分类号： H04B10/695 , H03F3/087
摘要： PROBLEM TO BE SOLVED: To stabilize a reference signal early and to set the reference signal to a fixed value.
SOLUTION: An electronic circuit and a communication system comprise a differential amplifier circuit (30) for receiving a digital input signal (VA) and a reference signal (Vref), a feedback circuit (10) for outputting the average value of the amplitude of the input signal (VA), and a holding circuit (20) for outputting a signal held according to the output signal (Vf) of the feedback circuit (10) as the reference signal (Vref). Since the holding circuit (20) holds and outputs the signal as the reference signal (Vref) according to the output signal (Vf) of the feedback circuit (10), the reference signal (Vref) can be stabilized early.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提前稳定参考信号并将参考信号设置为固定值。解决方案：电子电路和通信系统包括用于接收数字输入信号（VA）和参考信号（Vref）的差分放大器电路（30），反馈电路（10），用于输出输入信号（VA）的幅度和用于输出根据反馈电路（10）的输出信号（Vf）保持的信号作为参考信号（Vref）的保持电路（20）。由于保持电路（20）根据反馈电路（10）的输出信号（Vf）保持并输出作为参考信号（Vref）的信号，因此可以提前稳定基准信号（Vref）。版权所有（C）2008，JPO＆INPIT

24. 发明专利

JP2008108409A Photoreceiver/amplifier circuit, optical pickup apparatus, and optical disk drive 有权
标题翻译：光电/放大器电路，光学拾取器和光盘驱动器
公开(公告)号：JP2008108409A
公开(公告)日：2008-05-08
申请号：JP2007181433
申请日：2007-07-10
申请人： Sharp Corp , シャープ株式会社
发明人： ONISHI MASAYA
IPC分类号： G11B7/13 , H01L31/10
CPC分类号： H03F3/087 , H03F1/26 , H03F3/45085 , H03F3/45475 , H03F3/456 , H03F3/45973 , H03F2203/45212 , H03F2203/45528 , H03F2203/45536 , H03F2203/45618
摘要： PROBLEM TO BE SOLVED: To obtain a photoreceiver/amplifier circuit reducing noise and providing desirable offset voltage characteristics. SOLUTION: The subject invention provides a photoreceiver/amplifier circuit comprising a differential circuit including a differential transistor pair and a bias circuit; an active load; a feedback resistor for converting a photocurrent generated from a photodiode into a voltage; a reference resistor; and a compensation circuit. The resistance of the feedback resistor is greater than the resistance of the reference resistor. The compensation circuit supplies a compensation current from a junction between the feedback resistor and a non-inverting input terminal of the differential amplifier circuit, so as to cancel the difference between a voltage between terminals of the feedback resistor and a voltage between terminals of the reference resistor. This reduces noise and improves offset voltage characteristics. The present invention provides a photoreceiver/amplifier circuit ensuring noise reduction and desirable offset voltage characteristics. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：获得降低噪声并提供期望的失调电压特性的光接收器/放大器电路。解决方案：本发明提供了一种光接收器/放大器电路，其包括包括差分晶体管对和偏置电路的差分电路; 有功负载; 用于将从光电二极管产生的光电转换成电压的反馈电阻器; 参考电阻; 和补偿电路。反馈电阻的电阻大于参考电阻的电阻。补偿电路从反馈电阻和差分放大器电路的非反相输入端之间的接点提供补偿电流，以消除反馈电阻的端子之间的电压与参考电压的端子之间的电压之间的差值电阻。这降低了噪声并改善了失调电压特性。本发明提供一种确保噪声降低和期望的失调电压特性的光接收器/放大器电路。版权所有（C）2008，JPO＆INPIT

25. 发明专利

JP2008510383A Signal power level detection method and circuit 有权
公开(公告)号：JP2008510383A
公开(公告)日：2008-04-03
申请号：JP2007525750
申请日：2005-08-10
申请人：トリアクセステクノロジーズインコーポレイテッド
发明人：デイ、クリス、ジェイ．
IPC分类号： H03F3/08 , H03F1/22 , H03F3/45 , H03G3/10
CPC分类号： H03F1/26 , H03F1/32 , H03F3/087 , H03F3/45179 , H03F3/45183 , H03F3/45475 , H04B10/66 , H04B10/6931 , H04B10/697
摘要：入力側の光信号のレベルの変化に対して、出力信号のレベルを一定に保ち、光受信機の出力パワーレベルを検出する回路及び方法を提供する。フォトディテクタは、光信号を検出し、フォトディテクタからの電流は、増幅器に供給される。増幅器は、差動トランスインピーダンス増幅器であってもよく、又は差動出力増幅器に接続されたデュアルトランスインピーダンス増幅器であってもよい。増幅器の出力信号は、信号検出器に供給され、信号検出器の出力信号は、光受信機の出力パワーレベルを示す。

26. 发明专利

JP2007124473A Optical communication equipment 审中-公开
标题翻译：光通信设备
公开(公告)号：JP2007124473A
公开(公告)日：2007-05-17
申请号：JP2005316181
申请日：2005-10-31
申请人： Yokogawa Electric Corp , 横河電機株式会社
发明人： HAYASHI DAISUKE , SUEHIRO MASAYUKI , IIO SHINJI , UMEZAWA TOSHIMASA , ODAKA HIROHISA , WADA MORIO , SHIMIZU HIROSHI , AKASAKA KYOICHI , IZAWA TOSHIYASU
IPC分类号： H04B10/40 , H03F3/08 , H04B10/50 , H04B10/524 , H04B10/60 , H04B10/67 , H04B10/69
CPC分类号： H03F3/087 , H03F1/08 , H03F2200/48 , H03F2200/54 , H03F2203/45156
摘要： PROBLEM TO BE SOLVED: To provide a module of PD-TIA in which even a signal varying a mark rate constantly like optical packet communication is available for recognizing an optical signal in a system.
SOLUTION: The optical communication equipment is provided with: a photoelectric conversion element for converting an optical signal into a current signal; a current/voltage converting means connected to the photoelectric conversion element for converting the current signal into a voltage signal; and a limiting amplifier which inputs and amplifies the electric signal converted into voltage by the current/voltage converting means, compares the amplified electric signal with a predetermined threshold and outputs a signal of 0 or 1.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供PD-TIA的模块，其中甚至连续地改变像光分组通信的标记速率的信号可用于识别系统中的光信号。光通信设备具有：用于将光信号转换为电流信号的光电转换元件; 电流/电压转换装置，连接到光电转换元件，用于将电流信号转换成电压信号; 以及限制放大器，其输入和放大由电流/电压转换装置转换成电压的电信号，将放大的电信号与预定阈值进行比较，并输出0或1的信号。（C）2007， JPO＆INPIT

27. 发明专利

JP3858304B2 Light receiving circuit 失效
标题翻译：空值
公开(公告)号：JP3858304B2
公开(公告)日：2006-12-13
申请号：JP15957496
申请日：1996-06-20
申请人：住友電気工業株式会社
发明人：一也松本
IPC分类号： H01L31/10 , H03F1/56 , H03F3/08 , H03H7/38 , H04B10/2507 , H04B10/293 , H04B10/40 , H04B10/50 , H04B10/60 , H04B10/67 , H04B10/69
CPC分类号： H04B10/697 , H03F1/565 , H03F3/087 , H03F2200/534
摘要： In order to compensate for deterioration in gain caused by decreases in signal source impedance on a higher frequency region, a frequency characteristic compensating inductor (7) is inserted between a light-receiving device (1) and its bias power supply (5). The light-receiving device (1) is connected to the bias power supply (5) by way of the inductor (7). By causing the resonance frequency determined by the inductor (7) and the parasitic capacitance and junction capacitance of device (1) to coincide in the vicinity of the upper limit frequency of the band of the optical receiver, the equivalent signal source impedance of the light-receiving device (1) can be enhanced, thus compensating for the decrease in gain of the receiver.
摘要翻译：为了补偿由于较高频率区域的信号源阻抗的降低引起的增益的劣化，频率特性补偿电感器（7）插入在光接收装置（1）和偏置电源（5）之间。光接收装置（1）通过电感器（7）连接到偏置电源（5）。通过使由电感器（7）确定的谐振频率和装置（1）的寄生电容和结电容在光接收器的频带的上限频率附近重合，光的等效信号源阻抗 - 接收装置（1）可以被增强，从而补偿接收机的增益的减小。

28. 发明专利

JP2006311062A Output circuit 审中-公开
标题翻译：输出电路
公开(公告)号：JP2006311062A
公开(公告)日：2006-11-09
申请号：JP2005129498
申请日：2005-04-27
申请人： Nec Electronics Corp , Necエレクトロニクス株式会社
发明人： TAKATSUKA NOBORU
IPC分类号： H03F1/32 , H03F3/68
CPC分类号： H03F1/30 , H03F3/04 , H03F3/087 , H03F3/211 , H03F3/50 , H03F3/505
摘要： PROBLEM TO BE SOLVED: To provide an output circuit which reduces the waveform distortion of an output signal.
SOLUTION: Electric power VDD1 is supplied to an amplifier A2 and a source follower S1 through common power wiring 1 and electric power VDD2 is supplied to an amplifier A1 through a power wiring 2 different from the power wiring 1. The power supply to the amplifier A2 and the source follower S1 and the power supply to the amplifier A1 are performed independently of each other to extend no influence of a voltage variation ΔV caused by a modulated current Im to the amplifier A1 even if the modulated current Im is generated by the amplifier A2 and the source follower S1.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种降低输出信号的波形失真的输出电路。解决方案：电源VDD1通过公共电源线1提供给放大器A2和源极跟随器S1，电源VDD2通过与电源线1不同的电源线2提供给放大器A1。供电至放大器A2和源极跟随器S1以及到放大器A1的电源彼此独立地执行，即使调制电流Im由...产生，也不会由调制电流Im引起的电压变化ΔV对放大器A1的影响放大器A2和源极跟随器S1。版权所有（C）2007，JPO＆INPIT

29. 发明专利

JP2006211629A Pdic having multiple gain states 审中-公开
标题翻译： PDIC有多个增益状态
公开(公告)号：JP2006211629A
公开(公告)日：2006-08-10
申请号：JP2005103427
申请日：2005-03-31
申请人： Samsung Electro Mech Co Ltd , 三星電機株式会社
发明人： KIM SANG SUK , KWON KYOUNG SOO , GONG JUNG CHUL , HWANG HYEON-SEOK
IPC分类号： H03F3/08 , H03G3/12 , H03K17/00 , H03K17/693
CPC分类号： H03F3/211 , G11B7/13 , H03F3/087 , H03F3/45179
摘要： PROBLEM TO BE SOLVED: To provide a multi-gain PDIC (PhotoDiode Integrated Circuit) capable of realizing a number of gain states using one output stage circuit.
SOLUTION: The multi-gain PDIC includes a current-voltage conversion unit which converts a current signal generated in accordance with an inputted optical signal into a voltage signal and outputs the voltage signal, an input amplification stage connected to the current-voltage conversion unit by a first input terminal to receive and amplify the voltage signal, a reference resistance unit connected to a second input terminal of the input amplification stage, an output amplification stage connected to an output terminal of the input amplification stage, a feedback resistance unit including a plurality of resistance elements connected in parallel between the second input terminal of the input amplification stage circuit and the output terminal of the output amplification stage circuit and including resistance values different from each other, and a switching unit which selectively connects any one of the plurality of resistance elements of the feedback resistance unit.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供能够使用一个输出级电路实现多个增益状态的多增益PDIC（光电二极管集成电路）。解决方案：多增益PDIC包括电流 - 电压转换单元，其将根据输入的光信号生成的电流信号转换为电压信号并输出电压信号，连接到电流电压的输入放大级转换单元，通过第一输入端子接收和放大电压信号;连接到输入放大级的第二输入端的参考电阻单元，连接到输入放大级的输出端的输出放大级，反馈电阻单元包括并联连接在输入放大级电路的第二输入端子和输出放大级电路的输出端子之间的多个电阻元件，并且包括彼此不同的电阻值;以及切换单元，其选择性地连接反馈电阻单元的多个电阻元件。版权所有（C）2006，JPO＆NCIPI

30. 发明专利

JP2005304022A Optical reception circuit 审中-公开
标题翻译：光接收电路
公开(公告)号：JP2005304022A
公开(公告)日：2005-10-27
申请号：JP2005107296
申请日：2005-04-04
申请人： Sumitomo Electric Ind Ltd , 住友電気工業株式会社
发明人： NISHIYAMA NAOKI
IPC分类号： H03F3/08 , H01J40/14 , H03F1/30 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/158 , H04B10/26 , H04B10/28
CPC分类号： H04B10/66 , H03F1/30 , H03F3/087
摘要： PROBLEM TO BE SOLVED: To hold an output of a photo diode to a predetermined value, and to prevent it from the saturation of a reception circuit caused by over output power and self destruction of the photo diode. SOLUTION: An optical reception circuit according to the present invention is composed of a bias power source and a feedback control circuit, and includes a photo diode, a high voltage source, and a voltage control circuit. The feedback control circuit is designed to compare a voltage signal with a predetermined value after detecting a signal current produced by the photo diode and converting it to the voltage signal. The value of a bias power source supplied to the photo diode is to be adjusted so that the signal current is to be maintained to the predetermined value after adjusting the voltage control circuit in response to the result of the comparison. As a result, an average signal value of the signal current from the photo diode is to be maintained to the predetermined value, thereby an amplifier to be connected to the photo diode is prevented from the saturation. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：将光电二极管的输出保持在预定值，并防止由于过功率和光破坏造成的接收电路的饱和。解决方案：根据本发明的光接收电路由偏置电源和反馈控制电路组成，包括光电二极管，高电压源和电压控制电路。反馈控制电路被设计为在检测由光电二极管产生的信号电流并将其转换为电压信号之后将电压信号与预定值进行比较。调整提供给光电二极管的偏置电源的值，以便根据比较结果调整电压控制电路后，使信号电流保持在预定值。结果，将来自光电二极管的信号电流的平均信号值保持在预定值，从而防止连接到光电二极管的放大器饱和。版权所有（C）2006，JPO＆NCIPI

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