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17 条记录 (耗时 0.012 秒)

    GROUND FAULT CIRCUIT INTERRUPTER AND METHOD
    4.
    发明申请
    GROUND FAULT CIRCUIT INTERRUPTER AND METHOD 有权
    接地故障电路中断器和方法

    公开(公告)号：US20160233837A1

    公开(公告)日：2016-08-11

    申请号：US15132775

    申请日：2016-04-19

    申请人： SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

    发明人： Riley D. Beck ,  Scott R. Grange

    IPC分类号： H03F1/30 ,  G01R27/18 ,  H02H3/33 ,  G01R31/02 ,  H03F3/45 ,  H02H3/16

    CPC分类号： H03F1/303 ,  G01R27/18 ,  G01R31/025 ,  H02H1/0092 ,  H02H1/04 ,  H02H3/162 ,  H02H3/33 ,  H03F3/45 ,  H03F2203/45152 ,  H03F2203/45228 ,  H03F2203/45288

    摘要： A method and circuit for dynamically correcting offsets associated with an AC power system. In an embodiment, a first offset current generated in response to a ground to neutral fault stimulus is decreased and a second offset current generated in response to a differential fault stimulus is decreased. In another embodiment, the circuit includes an offset correction circuit that has one of a chopper circuit or an auto-zeroing circuit. An amplifier is connected to the offset correction circuit and an output connected to the offset correction circuit. A signal generator is switchably coupled to a first input of the offset correction circuit and a bias generator is switchably coupled to the first input of the offset correction circuit.

    摘要翻译： 一种用于动态校正与交流电力系统相关联的偏移的方法和电路。 在一个实施例中，响应于接地到中性故障刺激而产生的第一偏移电流减小，并且响应于差分故障刺激而产生的第二偏移电流减小。 在另一个实施例中，电路包括具有斩波电路或自动归零电路之一的偏移校正电路。 放大器连接到偏移校正电路和连接到偏移校正电路的输出。 信号发生器可切换地耦合到偏移校正电路的第一输入端，并且偏置发生器可切换地耦合到偏移校正电路的第一输入端。

    OPTICAL RECEIVER, ACTIVE OPTICAL CABLE, AND CONTROL METHOD FOR OPTICAL RECEIVER
    5.
    发明申请
    OPTICAL RECEIVER, ACTIVE OPTICAL CABLE, AND CONTROL METHOD FOR OPTICAL RECEIVER 有权
    光接收机，有源光缆，光接收机控制方法

    公开(公告)号：US20160285563A1

    公开(公告)日：2016-09-29

    申请号：US15170185

    申请日：2016-06-01

    申请人： FUJIKURA LTD.

    发明人： Takayuki TANAKA ,  Minako HAYASHI

    IPC分类号： H04B10/69 ,  G01J1/44

    CPC分类号： H04B10/697 ,  G01J1/44 ,  G01J2001/444 ,  H03F3/087 ,  H03F3/45475 ,  H03F3/45968 ,  H03F2200/375 ,  H03F2200/405 ,  H03F2200/453 ,  H03F2200/462 ,  H03F2200/481 ,  H03F2203/45152 ,  H03F2203/45212 ,  H04B10/69 ,  H04B10/695

    摘要： The present disclosure includes a photodetector element (11) that converts an optical signal into an electric current signal; a transimpedance amplifier (12a) that converts the electric current signal into a voltage signal; a differential amplifier (12d) that converts the voltage signal into a differential signal, by performing differential amplification of a difference between the voltage signal and a threshold voltage; an LOS detection circuit that detects a no-signal section of the optical signal; and an MCU that repeatedly executes offset cancellation processing, the offset cancellation processing including threshold voltage change processing in which the threshold voltage is changed such that an offset voltage of the differential signal is reduced, the MCU 13 skipping the threshold voltage change processing in the no-signal section.

    摘要翻译： 本公开包括将光信号转换为电流信号的光电检测器元件（11）; 将电流信号转换为电压信号的跨阻放大器（12a）; 通过对电压信号和阈值电压之间的差进行差分放大，将电压信号转换成差分信号的差分放大器（12d）; 检测光信号的无信号部分的LOS检测电路; 以及重复执行偏移消除处理的MCU，所述偏移消除处理包括阈值电压变化处理，其中阈值电压被改变，使得差分信号的偏移电压被减小，MCU 13跳过否定的阈值电压变化处理 信号部分。

    GROUND FAULT CIRCUIT INTERRUPTER AND METHOD
    6.
    发明申请
    GROUND FAULT CIRCUIT INTERRUPTER AND METHOD 有权
    接地故障电路中断器和方法

    公开(公告)号：US20130215537A1

    公开(公告)日：2013-08-22

    申请号：US13829366

    申请日：2013-03-14

    申请人： Riley D. Beck ,  Kent D. Layton

    发明人： Riley D. Beck ,  Kent D. Layton

    IPC分类号： H02H3/16

    CPC分类号： H03F1/303 ,  G01R27/18 ,  G01R31/025 ,  H02H1/0092 ,  H02H1/04 ,  H02H3/162 ,  H02H3/33 ,  H03F3/45 ,  H03F2203/45152 ,  H03F2203/45228 ,  H03F2203/45288

    摘要： A method and circuit for determining a circuit element parameter in a ground fault circuit interrupter circuit. An electrical signal provided to a first node is used to generate another electrical signal at a second node. The electrical signal at the second node is multiplexed with a modulation signal to generate a modulated signal that is then filtered and converted into a digital representation of a portion of the circuit element parameter. The electrical signal at the second node is multiplexed with the modulation signal after it has been phase shifted to produce a modulated signal that is filter and converted into a digital representation of another portion of the circuit element parameter. In another aspect, a slope based solenoid self-test method is used for self-testing in a GFCI circuit. Alternatively, a method for determining a wiring fault is provided using a digital filter.

    摘要翻译： 一种用于确定接地故障电路断续器电路中的电路元件参数的方法和电路。 提供给第一节点的电信号用于在第二节点产生另一电信号。 第二节点处的电信号与调制信号多路复用，以产生经过滤波的调制信号，并将其转换为电路元件参数的一部分的数字表示。 第二节点上的电信号在相移之后与调制信号多路复用，以产生被滤波的调制信号并转换成电路元件参数的另一部分的数字表示。 另一方面，在GFCI电路中使用基于斜率的电磁自检方法进行自检。 或者，使用数字滤波器提供用于确定布线故障的方法。

    Apparatus and method for input stage and bias canceller for an audio operational amplifier
    7.
    发明授权
    Apparatus and method for input stage and bias canceller for an audio operational amplifier 有权
    用于音频运算放大器的输入级和偏置消除器的装置和方法

    公开(公告)号：US07649417B1

    公开(公告)日：2010-01-19

    申请号：US11752827

    申请日：2007-05-23

    申请人： Matsuro Koterasawa

    发明人： Matsuro Koterasawa

    IPC分类号： H03F3/45

    CPC分类号： H03F3/187 ,  H03F1/305 ,  H03F3/3066 ,  H03F3/45085 ,  H03F3/45475 ,  H03F3/45618 ,  H03F3/45991 ,  H03F2200/03 ,  H03F2200/408 ,  H03F2200/453 ,  H03F2203/45138 ,  H03F2203/45152 ,  H03F2203/45154 ,  H03F2203/45212

    摘要： An input bias cancellation stage for an audio operational amplifier is provided. The input bias cancellation stage includes an input differential pair, a current mirror, and a bias duplicator transistor that substantially duplicates the input bias current. The bias duplicator transistor receives substantially the same emitter current as the transistors in the input differential pair, and has substantially the same Vce as the transistors in the input differential pair. The current mirror mirrors the duplicated bias current and subtracts it from the bases of the transistors in the input differential pair so that the input bias current is substantially cancelled.

    摘要翻译： 提供了一种用于音频运算放大器的输入偏置消除级。 输入偏置消除级包括基本上复制输入偏置电流的输入差分对，电流镜和偏置复制晶体管。 偏置复制晶体管接收与输入差分对中的晶体管大致相同的发射极电流，并且具有与输入差分对中的晶体管基本相同的Vce。 电流镜反映了重复的偏置电流，并从输入差分对中的晶体管的基极中减去它，从而基本上消除了输入偏置电流。