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    • 4. 发明申请
    • DC-COUPLED RECEIVER FOR SHARED OPTICAL SYSTEM
    • 用于共享光学系统的直流耦合接收器
    • WO1997035389A1
    • 1997-09-25
    • PCT/US1997003810
    • 1997-03-12
    • ERICSSON RAYNET
    • ERICSSON RAYNETGELLER, William, L.ARSTEIN, David, M.ELLERSICK, William, F.
    • H04B10/06
    • H04L25/061H04B10/695
    • A dc-coupled receiver for a shared optical system includes an input feedback amplifier circuit (16) which establishes a dc reference baseline voltage level for incoming packets of data. A pair of sample-and-hold circuits (18, 20) are connected in parallel to receive and sample signals from the feedback amplifier circuit when no data is being transmitted and at the initial edge of incoming packets of data. A voltage divider circuit (42) receiving signals from the sample-and-hold circuits establishes a dc slicing level for each incoming packets of data. An output feedback circuit (28) can be added to compensate for offset error without affecting the performance of the sample-and-hold circuitry.
    • 用于共享光学系统的直流耦合接收器包括输入反馈放大器电路(16),其为输入的数据分组建立直流参考基准电压电平。 一对采样和保持电路(18,20)并联连接,以便在没有数据传输时和在输入数据包的初始边缘处从反馈放大器电路接收和采样信号。 从采样和保持电路接收信号的分压器电路(42)为每个输入的数据分组建立直流限幅电平。 可以添加输出反馈电路(28)以补偿偏移误差而不影响采样保持电路的性能。
    • 5. 发明申请
    • SUBSCRIBER NETWORK INTERFACE AND METHOD
    • 订户网络接口和方法
    • WO1997032411A1
    • 1997-09-04
    • PCT/US1997002685
    • 1997-02-21
    • ERICSSON RAYNET
    • ERICSSON RAYNETNABOULSI, MarwanKUMAR, AshokMOSTAFA, MohamedGHAIBEH, GihadHELWEH, AmirKUMAR, Rajesh
    • H04J01/06
    • H04N7/17309H04L2012/5607H04L2012/5615H04Q11/0478
    • A subscriber network interface for connecting a subscriber premises location to a broadband communication network transporting multiple two-way communication signals, including at least RF analog and RF carrier modulated ATM cells, respectively, includes a coupler (42) for directing incoming communication signals onto, and outgoing signals off of, respectively, at least first and second internal RF communication paths (44, 46), wherein the first RF communication path (44) includes a bandpass filter (50) for restricting transmission to, e.g., a CATV broadcast signal, and the second RF communication path (46) is connected to a first modem (56) configured for demodulating and modulating, respectively, the incoming and outgoing ATM cells. A second modem for separately demodulating and modulating the incoming and outgoing digital baseband signals may also be provided.
    • 用于将用户驻地位置连接到传输多个双向通信信号的宽带通信网络的用户网络接口分别包括至少RF模拟和RF载波调制的ATM信元,所述耦合器(42)用于将进入的通信信号引导到, 和输出信号分别离开至少第一和第二内部RF通信路径(44,46),其中第一RF通信路径(44)包括用于将传输限制到例如CATV广播信号的带通滤波器(50) ,并且第二RF通信路径(46)连接到配置用于分别对输入和输出ATM信元进行解调和调制的第一调制解调器(56)。 还可以提供用于单独解调和调制输入和输出数字基带信号的第二调制解调器。
    • 8. 发明申请
    • SELF-CALIBRATING DATA PROCESSORS AND METHODS FOR CALIBRATING SAME
    • 自我校准数据处理器及其校准方法
    • WO1996009557A1
    • 1996-03-28
    • PCT/US1995011572
    • 1995-09-13
    • ERICSSON RAYNET
    • ERICSSON RAYNETQUADERER, JamesSANDERS, Kirk
    • G01R35/00
    • H03M1/1028G01R35/00H03M1/1215
    • Highly accurate, self-calibrating data processors (16) and methods for calibrating the same use internal analog references (32) with negligible time and temperature drifts. A first input reference signal set generated by any accurate, precision analog reference (18) is applied to a data processor (16). The corresponding output response is compared to the theoretical ideal output response to determine the data processor's initial gain and offset errors. This information can be stored in non-volatile memory (34), re-called, and used to compensate for the data processor's initial gain and offset errors during actual use of the data processor (16). Subsequent errors due to time and temperature drifting can be determined by comparing the output responses to a second input reference signal set which is generated by the internal analog reference (32). The subsequent errors can be combined with the initial errors to compensate for system errors within the data processor (16).
    • 高精度,自校准的数据处理器(16)和用于校准相同使用的内部模拟参考(32)的方法,具有可忽略的时间和温度漂移。 通过任何精确的精密模拟参考(18)产生的第一输入参考信号组被施加到数据处理器(16)。 将相应的输出响应与理论输出响应进行比较,以确定数据处理器的初始增益和偏移误差。 该信息可以存储在非易失性存储器(34)中,被重新调用并用于在数据处理器(16)的实际使用期间补偿数据处理器的初始增益和偏移误差。 可以通过将输出响应与由内部模拟参考(32)产生的第二输入参考信号组进行比较来确定由于时间和温度漂移引起的后续误差。 随后的错误可以与初始错误组合以补偿数据处理器(16)内的系统错误。