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    Offset cancellation device
    2.
    发明专利
    Offset cancellation device 有权
    偏移消除装置

    公开(公告)号：JP2008258725A

    公开(公告)日：2008-10-23

    申请号：JP2007096295

    申请日：2007-04-02

    Applicant: Oki Electric Ind Co Ltd ,  沖電気工業株式会社

    Inventor： HIGUCHI KOUJI

    IPC: H03F1/34 ,  H03F3/34

    CPC classification number: H03F3/45977 ,  H03F3/45744 ,  H03F3/45753 ,  H03F2203/45212 ,  H03F2203/45354 ,  H03F2203/45391 ,  H03F2203/45392 ,  H03F2203/45396 ,  H03F2203/45514 ,  H03F2203/45551

    Abstract: PROBLEM TO BE SOLVED: To provide an offset cancellation device capable of canceling offset even when a capacitive or resistance device is connected to the outside of an operational amplifier, and of outputting a signal during the canceling operation of offset.
    SOLUTION: This offset cancellation device is configured to run with the combination of output signals fewer in number than output signals to be output from a plurality of output circuits 16, each of which adjusts the gain of an input signal supplied to an operational amplifier 210. A selection output circuit 20 selects and outputs the prescribed number of output signals of a plurality of output circuits 16 necessary for driving the device. A judgement circuit 30 compares an output signal which has not been selected with a reference signal to adjust the gain of the output circuit 16, and cancels the offset of the operational amplifier 210. In the operation amplifier 210, a plurality of CAP groups are configured by combining feedback capacitors 226 by different number of aggregates, and whether or not those feedback capacitors function for each CAP group is switched until the judgement of normality is made by the judgement circuit 30.
    COPYRIGHT: (C)2009,JPO&INPIT

    Abstract translation: 要解决的问题：提供即使当电容或电阻装置连接到运算放大器的外部并且在偏移的抵消操作期间输出信号也能够抵消偏移的偏移消除装置。 解决方案：该偏移消除装置被配置为以多个输出信号的输出信号的数量少于要从多个输出电路16输出的输出信号的组合运行，每个输出电路16调整提供给操作的输入信号的增益 选择输出电路20选择并输出驱动装置所需的多个输出电路16的规定数量的输出信号。 判断电路30将未被选择的输出信号与参考信号进行比较，以调整输出电路16的增益，并且消除运算放大器210的偏移。在运算放大器210中，配置多个CAP组 通过将反馈电容器226组合为不同数目的聚合，并且这些反馈电容器是否对每个CAP组进行功能切换，直到判断电路30进行正常判断为止。（C）2009，JPO＆INPIT

    Differential amplifier circuit and charge controller using the differential amplifier circuit
    3.
    发明专利
    Differential amplifier circuit and charge controller using the differential amplifier circuit 审中-公开
    使用差分放大器电路的差分放大器电路和充电控制器

    公开(公告)号：JP2008067188A

    公开(公告)日：2008-03-21

    申请号：JP2006244430

    申请日：2006-09-08

    Applicant: Ricoh Co Ltd ,  株式会社リコー

    Inventor： NODA IPPEI

    IPC: H03F1/30 ,  H03F3/45

    CPC classification number: H03F3/45183 ,  H03F3/45771 ,  H03F3/70 ,  H03F2203/45048 ,  H03F2203/45101 ,  H03F2203/45244 ,  H03F2203/45354 ,  H03F2203/45372 ,  H03F2203/45391 ,  H03F2203/45392 ,  H03F2203/45482 ,  H03F2203/45686

    Abstract: PROBLEM TO BE SOLVED: To obtain a differential amplifier circuit having an offset adjustment circuit which is not affected by temperature change and secular change without affecting resolution of offset voltage by variation in manufacture, and to provide a charge controller using the differential amplifier circuit.
    SOLUTION: The differential amplifier is constituted so that voltage drop in the adjustment resistor always becomes constant, offset compensation voltage Vadj closest to measured offset voltage Vof is set since a bias current source 2 fluctuates bias current i3 so as to compensate fluctuation in resistance values even when the resistance values of resistors R1-R4 constituting an adjustment resistor fluctuate by the manufacturing variation, furthermore, fluctuation of the offset compensation voltage Vadj is suppressed since a resistor Rb for generating the bias current similarly changes even when the adjustment resistor changes according to temperature variation during an operation and a resistance value of the adjustment resistor changes by aging in the differential amplifier circuit 1.
    COPYRIGHT: (C)2008,JPO&INPIT

    Abstract translation: 要解决的问题：为了获得具有不受温度变化和长期变化影响的偏移调整电路的差分放大器电路，而不会通过制造变化而影响偏移电压的分辨率，并且提供使用差分放大器的充电控制器 电路。 解决方案：差分放大器构成为使得调节电阻器中的电压降总是恒定的，因为偏置电流源2使偏置电流i3波动，所以偏移补偿电压Vadj被设置为最接近测量的偏移电压Vof，以补偿波动 即使当构成调节电阻器的电阻器R1-R4的电阻值由于制造变化而波动时，电阻值也被抑制，此外，由于用于产生偏置电流的电阻器Rb即使当调节电阻器变化时也类似地改变，所以抑制了偏移补偿电压Vadj的波动 根据操作期间的温度变化，并且调节电阻器的电阻值由差分放大器电路1中的老化而改变。版权所有（C）2008，JPO＆INPIT

    Voltage comparison circuit, and semiconductor integrated circuit having the voltage comparison circuit, and electronic apparatus
    5.
    发明专利
    Voltage comparison circuit, and semiconductor integrated circuit having the voltage comparison circuit, and electronic apparatus 有权
    电压比较电路和具有电压比较电路的半导体集成电路和电子设备

    公开(公告)号：JP2009194599A

    公开(公告)日：2009-08-27

    申请号：JP2008032706

    申请日：2008-02-14

    Applicant: Ricoh Co Ltd ,  株式会社リコー

    Inventor： KAMAYA TOMOHIKO

    IPC: H03K5/08

    CPC classification number: H03F3/45179 ,  H03F2203/45101 ,  H03F2203/45354 ,  H03F2203/45392 ,  H03F2203/45674

    Abstract: PROBLEM TO BE SOLVED: To obtain a voltage comparison circuit with an offset which reduces the variation of a threshold, detects the generation of a prescribed offset voltage between inputted two signals, and is high in speed and accuracy, and a semiconductor integrated circuit having the voltage comparison circuit, and an electronic apparatus. SOLUTION: The voltage comparison circuit is equipped with a resistance R1 connected between a constant current circuit 12 and one input transistor M1 of a differential input circuit 11. A current outputted from a PMOS transistor M3 comprising the constant current circuit 12 feeding a bias current to each of the input transistors M1 and M2 is controlled by the current control circuit 4 so that a voltage difference at both ends of the resistance R1 becomes constant at a predetermined value Va of a reference voltage Vref. COPYRIGHT: (C)2009,JPO&INPIT

    Abstract translation: 要解决的问题为了获得具有减小阈值变化的偏移的电压比较电路，检测输入的两个信号之间产生规定的偏移电压，并且速度和精度高，并且半导体集成 具有电压比较电路的电路和电子设备。 电压比较电路配备有连接在差分输入电路11的恒流电路12和一个输入晶体管M1之间的电阻R1。从包括恒流电路12的PMOS晶体管M3输出的电流馈送到 通过电流控制电路4控制到每个输入晶体管M1和M2的偏置电流，使得电阻R1两端的电压差在参考电压Vref的预定值Va时变为恒定。 版权所有（C）2009，JPO＆INPIT

    Driver circuit
    6.
    发明专利
    Driver circuit 审中-公开
    驱动电路

    公开(公告)号：JP2008072234A

    公开(公告)日：2008-03-27

    申请号：JP2006247173

    申请日：2006-09-12

    Applicant: Nec Electronics Corp ,  Necエレクトロニクス株式会社

    Inventor： NAKAGAWA YORIJI

    IPC: H03K19/0175 ,  H03F3/45 ,  H03K17/687 ,  H03K19/0185

    CPC classification number: H03F3/45183 ,  H03F3/45766 ,  H03F2203/45101 ,  H03F2203/45291 ,  H03F2203/45354 ,  H03F2203/45466 ,  H03F2203/45482 ,  H03F2203/45508 ,  H03F2203/45624 ,  H03F2203/45686 ,  H03F2203/45702

    Abstract: PROBLEM TO BE SOLVED: To solve the matter of conventional driver circuit that it is difficult to control the output amplitude or the output voltage such as the neutral voltage of a CML circuit, and the matter of conventional driver circuit that the high level of output voltage of the CML circuit is dropped from the power supply voltage.
    SOLUTION: The driver circuit has an amplitude conversion section delivering a differential output signal by converting the amplitude of a differential input signal, a section for setting the amplitude of the differential output signal, and a section for setting the central value of amplitude of the differential output signal.
    COPYRIGHT: (C)2008,JPO&INPIT

    Abstract translation: 要解决的问题：为了解决难以控制CML电路的中性电压的输出幅度或输出电压的传统驱动电路的问题，以及常规驱动电路的问题，高电平 CML电路的输出电压从电源电压下降。 解决方案：驱动器电路具有通过转换差分输入信号的幅度，用于设置差分输出信号的幅度的部分和用于设置幅度的中心值的部分来传递差分输出信号的幅度转换部分 的差分输出信号。 版权所有（C）2008，JPO＆INPIT

    オフセット補正回路およびトランスコンダクタンス比例電流生成回路
    7.
    发明专利
    オフセット補正回路およびトランスコンダクタンス比例電流生成回路 审中-公开

    公开(公告)号：JP2017169092A

    公开(公告)日：2017-09-21

    申请号：JP2016053539

    申请日：2016-03-17

    Applicant: 富士電機株式会社

    Inventor： 岩本 基光

    IPC: H03F3/45

    CPC classification number: H03F1/301 ,  H03F3/45183 ,  H03F3/4521 ,  H03F3/45771 ,  H03F2203/45212 ,  H03F2203/45286 ,  H03F2203/45288 ,  H03F2203/45291 ,  H03F2203/45354 ,  H03F2203/45396

    Abstract: 【課題】温度ドリフトを抑制して高精度のオフセット電圧の補正を行う。 【解決手段】第1の増幅回路11aは、入力電圧の差を増幅する差動対トランジスタと、差動対トランジスタに接続する能動負荷トランジスタとを含む。第2の増幅回路11bは、第1の増幅回路11aの出力電圧を増幅する。オフセット補正用電流源12は、能動負荷トランジスタに並列に接続され、差動対トランジスタに流れる電流を調整して、オフセット電圧を補正する。オフセット補正用スイッチ13は、オフセット補正用電流源12の駆動状態を切り替える。トランスコンダクタンス比例電流生成回路14は、トランスコンダクタンスに比例し、オフセット電圧を補正するためのオフセット補正電圧の温度ドリフトを補償するためのトランスコンダクタンス比例電流を生成する。 【選択図】図1

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