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    • 1. 发明授权
    • Preamplifier circuit, clock switching circuit, and optical receiver
    • 前置放大器电路,时钟切换电路和光接收器
    • US07389056B2
    • 2008-06-17
    • US11043078
    • 2005-01-27
    • Masaki KuniiHirokazu Osada
    • Masaki KuniiHirokazu Osada
    • H04B10/06H03F3/08H04L27/08
    • H03G3/3084H03F3/08H03G3/3036H04B10/66H04L27/368
    • A preamplifier circuit, a clock switching circuit, and an optical receiver are provided that include a preamplifier that controls a bandwidth for conducting amplification on an input signal by varying a feedback resistance according to a control signal; a control signal generating part that determines the band of the output signal of the preamplifier to generate the control signal; and a correction signal generating part that generates a correction signal for correcting the control signal; wherein the correction signal corrects the control signal to adjust the feedback resistance. Accordingly, even when the number of rises and falls of an optical input signal in a given time period is less than a predetermined number range, the control signal may be properly generated to successfully conduct band control. Thus, an optical receiver that is not dedicated to a predetermined input signal pattern but is rather capable of automatically adjusting its bandwidth may be realized, and the cost of manufacturing the optical receiver structure may be reduced.
    • 提供前置放大器电路,时钟切换电路和光接收器,其包括:前置放大器,其通过根据控制信号改变反馈电阻来控制用于对输入信号进行放大的带宽; 控制信号生成部,其决定前置放大器的输出信号的频带,生成控制信号; 以及校正信号生成部,其生成用于校正控制信号的校正信号; 其中所述校正信号校正所述控制信号以调整所述反馈电阻。 因此,即使在给定时间段内的光输入信号的上升和下降次数小于预定数量范围的情况下,也可以适当地产生控制信号以成功进行频带控制。 因此,可以实现不专用于预定输入信号模式但是能够自动调整其带宽的光接收机,并且可以降低制造光接收机结构的成本。
    • 2. 发明申请
    • Preamplifier circuit, clock switching circuit, and optical receiver
    • 前置放大器电路,时钟切换电路和光接收器
    • US20050128007A1
    • 2005-06-16
    • US11043078
    • 2005-01-27
    • Masaki KuniiHirokazu Osada
    • Masaki KuniiHirokazu Osada
    • H03F1/42H03F3/08H03G3/20H03G3/30H04L27/36
    • H03G3/3084H03F3/08H03G3/3036H04B10/66H04L27/368
    • A preamplifier circuit, a clock switching circuit, and an optical receiver are provided that include a preamplifier that controls a bandwidth for conducting amplification on an input signal by varying a feedback resistance according to a control signal; a control signal generating part that determines the band of the output signal of the preamplifier to generate the control signal; and a correction signal generating part that generates a correction signal for correcting the control signal; wherein the correction signal corrects the control signal to adjust the feedback resistance. Accordingly, even when the number of rises and falls of an optical input signal in a given time period is less than a predetermined number range, the control signal may be properly generated to successfully conduct band control. Thus, an optical receiver that is not dedicated to a predetermined input signal pattern but is rather capable of automatically adjusting its bandwidth may be realized, and the cost of manufacturing the optical receiver structure may be reduced.
    • 提供前置放大器电路,时钟切换电路和光接收器,其包括:前置放大器,其通过根据控制信号改变反馈电阻来控制用于对输入信号进行放大的带宽; 控制信号生成部,其决定前置放大器的输出信号的频带,生成控制信号; 以及校正信号生成部,其生成用于校正控制信号的校正信号; 其中所述校正信号校正所述控制信号以调整所述反馈电阻。 因此,即使在给定时间段内的光输入信号的上升和下降次数小于预定数量范围的情况下,也可以适当地产生控制信号以成功进行频带控制。 因此,可以实现不专用于预定输入信号模式但是能够自动调整其带宽的光接收机,并且可以降低制造光接收机结构的成本。