Integrated photodiode/transimpedance amplifier
    11.
    发明授权
    Integrated photodiode/transimpedance amplifier 失效
    集成光电二极管/跨阻放大器

    公开(公告)号:US5767538A

    公开(公告)日:1998-06-16

    申请号:US728347

    申请日:1996-10-09

    CPC分类号: H03F1/08 H03F3/08

    摘要: An integrated circuit photodetector includes a transimpedance amplifier including a differential amplifier stage with PNP emitter-coupled transistors and a PNP input transistor which are biased only by base currents of the emitter-coupled transistors, to achieve low input bias current. Low noise operation is achieved by bypass capacitors coupled between the bases and emitters of the input transistors, respectively. A constant current source supplies a current which develops a small pedestal voltage across a resistor to bias the non-inverting input of the transimpedance amplifier so as to avoid nonlinear amplification of low level light signals. A positively biased N-type guard tub surrounds the photodetector, which is formed in a junction-isolated N region on a P substrate, to collect electrons generated in the substrate by deep-penetrating IR light to prevent them from causing amplification errors. In one embodiment, a feedback network includes a resistor connected between the output of a buffer driven by the transimpedance amplifier and an inverting input thereof, and a capacitor connected between the output and inverting input of the transimpedance amplifier to provide low noise, fast settling operation.

    摘要翻译: 集成电路光电检测器包括跨阻抗放大器,其包括具有PNP发射极耦合晶体管的差分放大器级和仅由发射极耦合晶体管的基极电流偏置的PNP输入晶体管,以实现低输入偏置电流。 分别通过耦合在输入晶体管的基极和发射极之间的旁路电容来实现低噪声操作。 恒流源提供电流,该电流在电阻器两端产生小的基座电压,以偏置跨阻放大器的非反相输入,以避免低电平光信号的非线性放大。 正偏置N型保护桶围绕形成在P基板上的结隔离N区域中的光电检测器,以通过深穿透IR光收集在衬底中产生的电子,以防止它们引起放大误差。 在一个实施例中,反馈网络包括连接在由跨阻抗放大器驱动的缓冲器的输出与其反相输入之间的电阻器,以及连接在跨阻放大器的输出和反相输入端之间以提供低噪声,快速稳定操作 。

    Communication on a pilot wire
    12.
    发明授权
    Communication on a pilot wire 有权
    在导线上进行通讯

    公开(公告)号:US08831077B2

    公开(公告)日:2014-09-09

    申请号:US13163513

    申请日:2011-06-17

    摘要: Systems and methods are disclosed for communicating on a pilot wire between Electric Vehicle Service Equipment (EVSE) and an Electric Vehicle (EV). The EVSE and EV exchange a Pulse Width Modulation (PWM) signal on the pilot wire to control charging operations of the EV. Data communications may also be transmitted on the pilot wire, such as between transmit and receive modems. The modems transmit communication signals either continuously, without regard to the state of the PWM signal, or only when the PWM is in an off-state. If transmitting while PWM is on, the modem needs a large coupling impedance and/or a large signal injection. To transmit only when the PWM is off, the modem may use a blocking diode in the coupling circuit or may synchronize to the pulses in the PWM signal.

    摘要翻译: 公开了用于在电动车辆服务设备(EVSE)和电动车辆(EV)之间的导线上通信的系统和方法。 EVSE和EV在导线上交换脉宽调制(PWM)信号,以控制EV的充电操作。 数据通信也可以在导线上传输,例如在发射和接收调制解调器之间。 调制解调器连续发送通信信号,而不考虑PWM信号的状态,或仅当PWM处于关闭状态时。 如果在PWM打开时发送,则调制解调器需要大的耦合阻抗和/或大的信号注入。 仅在PWM关闭时传输,调制解调器可以在耦合电路中使用阻塞二极管,或者可以与PWM信号中的脉冲同步。

    Coupling Circuits for Power Line Communication Devices
    13.
    发明申请
    Coupling Circuits for Power Line Communication Devices 有权
    用于电力线通信设备的耦合电路

    公开(公告)号:US20120068784A1

    公开(公告)日:2012-03-22

    申请号:US13229041

    申请日:2011-09-09

    IPC分类号: H01P1/10

    CPC分类号: H04B3/56

    摘要: Coupling circuits for power line communication (PLC) devices are described. In an embodiment, a PLC device may comprise a processor and a coupling circuit coupled to the processor. The coupling circuit may in turn comprise a transmitter path and a receiver path. In some implementations, the transmitter path may include a first amplifier, a first capacitor coupled to the first amplifier, a first transformer coupled to the first capacitor, and a plurality of line interface coupling circuits coupled to the first transformer, where each of the line interface coupling circuits is configured to be connected to a different phase of an electrical power circuit. Meanwhile, the receiver path may include a plurality of capacitors, where each of the plurality of capacitors coupled to a corresponding one of the line interface circuits, a filter network coupled to the plurality of capacitors, and a second amplifier coupled to the filter network.

    摘要翻译: 描述了用于电力线通信(PLC)设备的耦合电路。 在一个实施例中,PLC设备可以包括耦合到处理器的处理器和耦合电路。 耦合电路又可以包括发射机路径和接收机路径。 在一些实现中,发射机路径可以包括第一放大器,耦合到第一放大器的第一电容器,耦合到第一电容器的第一变压器,以及耦合到第一变压器的多个线路接口耦合电路,其中每条线 接口耦合电路被配置为连接到电力电路的不同相位。 同时,接收器路径可以包括多个电容器,其中多个电容器中的每一个耦合到对应的一个线路接口电路,耦合到多个电容器的滤波器网络以及耦合到滤波器网络的第二放大器。

    Communication on a Pilot Wire
    14.
    发明申请
    Communication on a Pilot Wire 有权
    飞行员通讯

    公开(公告)号:US20120002714A1

    公开(公告)日:2012-01-05

    申请号:US13163513

    申请日:2011-06-17

    IPC分类号: H03K7/08

    摘要: Systems and methods are disclosed for communicating on a pilot wire between Electric Vehicle Service Equipment (EVSE) and an Electric Vehicle (EV). The EVSE and EV exchange a Pulse Width Modulation (PWM) signal on the pilot wire to control charging operations of the EV. Data communications may also be transmitted on the pilot wire, such as between transmit and receive modems. The modems transmit communication signals either continuously, without regard to the state of the PWM signal, or only when the PWM is in an off-state. If transmitting while PWM is on, the modem needs a large coupling impedance and/or a large signal injection. To transmit only when the PWM is off, the modem may use a blocking diode in the coupling circuit or may synchronize to the pulses in the PWM signal.

    摘要翻译: 公开了用于在电动车辆服务设备(EVSE)和电动车辆(EV)之间的导线上通信的系统和方法。 EVSE和EV在导线上交换脉宽调制(PWM)信号,以控制EV的充电操作。 数据通信也可以在导线上传输,例如在发射和接收调制解调器之间。 调制解调器连续发送通信信号,而不考虑PWM信号的状态,或仅当PWM处于关闭状态时。 如果在PWM打开时发送,则调制解调器需要大的耦合阻抗和/或大的信号注入。 仅在PWM关闭时传输,调制解调器可以在耦合电路中使用阻塞二极管,或者可以与PWM信号中的脉冲同步。