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    • 2. 发明授权
    • Method and apparatus for monitoring a photo-detector in an optical transceiver
    • 用于监视光收发器中的光检测器的方法和装置
    • US06930300B1
    • 2005-08-16
    • US10209452
    • 2002-07-30
    • Darin James DoumaPhilip D. ShapiroLinda Xiaorong Liu
    • Darin James DoumaPhilip D. ShapiroLinda Xiaorong Liu
    • H01J40/14H04B10/158
    • H04B10/69
    • The method and apparatus for monitoring a photo-detector generates a highly compliant mirror current across a broad range of photo-detector current levels. The apparatus for monitoring includes: a pair of bipolar transistors and a first non-linear isolation element. The pair of transistors are connected in a mirror configuration with a sense transistor one of the pair of transistors sensing a photo-detector current and with a mirror transistor one of the pair of transistors mirroring the photo-detector current with a mirror current. The first non-linear isolation element has at least two terminals a first of which couples to the collector of the mirror transistor. The first non-linear isolation element exhibits a non-linear voltage drop between the at least two terminals in response to varying levels of the mirror current to improve compliance between the mirror current and the detector current. Methods and means for monitoring a photo-detector are also disclosed.
    • 用于监测光电检测器的方法和装置在宽范围的光电检测器电流水平上产生高度兼容的镜像电流。 用于监视的装置包括:一对双极晶体管和第一非线性隔离元件。 该对晶体管以反射镜配置与感测晶体管连接,该对晶体管中的一个感测光电检测器电流,并且与反射镜晶体管中的一对晶体管中的一个以镜像电流反射光检测器电流。 第一非线性隔离元件具有至少两个端子,其中第一端子耦合到反射镜晶体管的集电极。 第一非线性隔离元件响应于反射镜电流的变化水平而在至少两个端子之间呈现非线性电压降,以提高镜电流和检测器电流之间的一致性。 还公开了用于监测光检测器的方法和装置。