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    • 6. 发明授权
    • Bottom level detection device for burst mode optical receiver
    • 突发模式光接收机底层检测装置
    • US07330670B2
    • 2008-02-12
    • US10391704
    • 2003-03-19
    • Hee-Chan DohHyeon-Cheol KiYun-Je OhGil-Yong ParkTae-Sung ParkShin-Hee Won
    • Hee-Chan DohHyeon-Cheol KiYun-Je OhGil-Yong ParkTae-Sung ParkShin-Hee Won
    • H04B10/06
    • H04L25/061H03G3/3047H04B10/695
    • A bottom level detection device is disclosed for a burst mode optical receiver. The receiver includes a converter for converting a burst mode signal into a voltage signal and an automatic gain controller for automatically controlling a gain of the converter. The bottom level detection device detects a bottom level of an output signal from the converter and controls the automatic gain controller on the basis of the detected bottom level. The bottom level detection device includes an amplification circuit for receiving the output signal from the converter at its first input terminal and a fed-back output signal from the device at its second input terminal, respectively, and amplifying a difference between the received signals, a detector for detecting a bottom level of an output signal from the amplification circuit, and an output buffer. The detector includes an RC rectifier for receiving a power supply voltage, and a transistor having its emitter connected to an output terminal of the amplification circuit and its base and collector connected in common to the RC rectifier.
    • 公开了一种用于突发模式光接收机的底层检测装置。 接收机包括用于将突发模式信号转换为电压信号的转换器和用于自动控制转换器增益的自动增益控制器。 底部电平检测装置检测来自转换器的输出信号的底部电平,并且基于检测到的底部电平来控制自动增益控制器。 底层检测装置包括:放大电路,用于在其第一输入端接收来自转换器的输出信号,以及分别从其第二输入端的装置反馈输出信号,并放大接收信号之间的差 检测器,用于检测来自放大电路的输出信号的底部电平,以及输出缓冲器。 检测器包括用于接收电源电压的RC整流器,以及其发射极连接到放大电路的输出端并且其基极和集电极共同连接到RC整流器的晶体管。
    • 7. 发明授权
    • Burst-mode optical receiver of differential output structure
    • 差分输出结构的突发模式光接收机
    • US07218865B2
    • 2007-05-15
    • US10413979
    • 2003-04-15
    • Hee-Chan DohHyeon-Cheol KiYun-Je OhGil-Yong ParkTae-Sung ParkShin-Hee Won
    • Hee-Chan DohHyeon-Cheol KiYun-Je OhGil-Yong ParkTae-Sung ParkShin-Hee Won
    • H04B10/06
    • H04L25/062
    • A burst-mode optical receiver of a differential-output structure is disclosed. The burst-mode optical receiver includes a trans-impedance amplifier for converting currents indicating the burst-mode signals into voltage signals, a bottom-level detector for detecting the bottom level of signals outputted from the trans-impedance amplifier, an automatic gain controller for automatically adjusting a gain to prevent the output waveforms of the tran-simpedance amplifier from being distorted after receiving the bottom-level signals detected by the bottom-level detector, a top-level detector for detecting the top level of signals outputted from the trans-impedance amplifier, a pair of resistors for generating a signal-reference voltage from the bottom- and top-level voltages, one side of each resistor being connected to the bottom- and top-level detectors, respectively, and the other sides of each resistor being connected to each other, and a differential buffer for receiving outputs from the trans-impedance amplifier and the signal-reference voltage from the pair of resistors and for eliminating the offsets generated from the bottom- and top-level detectors in order to supply two differential outputs.
    • 公开了差分输出结构的突发模式光接收机。 突发模式光接收机包括用于将指示突发模式信号的电流转换成电压信号的跨阻放大器,用于检测从跨阻放大器输出的信号的底电平的底电平检测器,用于 自动调整增益以防止在接收到由底层检测器检测到的底层信号之后,反相放大器的输出波形失真,用于检测从反相放大器输出的信号的顶层信号的顶级检测器, 阻抗放大器,一对电阻,用于从底层和顶层电压产生信号参考电压,每个电阻的一侧分别连接到底层和顶层检测器,每个电阻的另一侧 彼此连接的差分缓冲器和用于接收来自所述跨阻放大器的输出的差分缓冲器和来自所述一对res的所述信号参考电压 并且用于消除从底层和顶级检测器产生的偏移,以便提供两个差分输出。
    • 8. 发明授权
    • Automatic gain control device for a burst-mode optical receiver
    • 用于突发模式光接收机的自动增益控制装置
    • US06911644B2
    • 2005-06-28
    • US10389058
    • 2003-03-14
    • Hee-Chan DohGil-Yong ParkShin-Hee WonYun-Je OhTae-Sung ParkHyeon-Cheol Ki
    • Hee-Chan DohGil-Yong ParkShin-Hee WonYun-Je OhTae-Sung ParkHyeon-Cheol Ki
    • H03F3/08H03G3/20H03G3/30H04B10/07H04B10/2507H04B10/272H04B10/293H04B10/40H04B10/50H04B10/524H04B10/54H04B10/564H04B10/572H04B10/58H04B10/60H04B10/69H01L31/00
    • H03G3/3084
    • An automatic-gain-control device in an optical receiver is provided and includes a pre-amplifier for converting a current signal outputted from an optical detector to a voltage signal and a bottom level detector for detecting the bottom level from the output of the pre-amplifier, the automatic-gain-control device comprising a bottom signal-level-determining section for analyzing the bottom level from the bottom level detector and outputting a signal denoting the presence of a signal and a reset signal for initialization at intervals between packets; and an automatic-gain-control signal generating section for providing an automatic-gain-control signal by showing the presence of a signal, the automatic-gain-control-signal-generating section including a first transistor which turns on according to a signal from the bottom signal-level-determining section and a second transistor which is connected to a capacitor for charging or discharging a voltage applied by the first transistor, and the drain voltage of which becomes low when the capacitor is charged but becomes high when the capacitor is discharged.
    • 提供了一种光接收机中的自动增益控制装置,包括:用于将从光学检测器输出的电流信号转换为电压信号的前置放大器;以及用于从预测电路的输出检测底部电平的底部电平检测器, 放大器,该自动增益控制装置包括底部信号电平确定部分,用于从底部电平检测器分析底部电平,并且输出表示存在信号的信号和用于在分组之间的间隔进行初始化的复位信号; 以及自动增益控制信号生成部,其通过显示信号的存在来提供自动增益控制信号,所述自动增益控制信号生成部包括:第一晶体管,其根据来自 底部信号电平确定部分和第二晶体管,其连接到用于对由第一晶体管施加的电压进行充电或放电的电容器,并且当电容器充电时其漏极电压变低,当电容器为 出院