具有改变判决门限电平的装置的接收机及光传输系统

Receiver having an apparatus for varying decision threshold level and an optical transmission system having the same

Abstract

本发明涉及一种具有用于改变判决门限电平的装置的光接收机以及具有该光接收机的光传输系统。根据本发明的具有用于改变判决门限电平的装置的光接收机以及具有该光接收机的光传输系统分别包括:光电二极管(PD),用于接收光信号并且将所接收到的光信号转换为电信号;跨阻放大器(TIA),用于预放大由PD转换的电信号;限幅放大器(LA),用于判决由TIA放大的电信号是电平“0”还是电平“1”并用于放大判决信号;时钟和数据恢复器(CDR),用于从由LA放大的判决信号生成时钟和数据;以及控制电路,用于基于由PD接收的光信号功率调节判决门限电平并用于向LA提供调节后的判决门限电平。
The present invention relates to an optical receiver having an apparatus for varying decision threshold level and an optical transmission system having the same. An optical receiver having an apparatus for varying decision threshold level and an optical transmission system having the same in accordance with the present invention respectively comprises a photo diode (PD) for receiving an optical signal and transforming the received optical signal into an electrical signal; a trans -impedance amplifier (TIA) for pre-amplifying the electrical signal transformed by the PD; a limiting amplifier (LA) for deciding the electrical signal amplified by the TIA as either level 0 or level 1 and for amplifying the decision signal; a clock and data recovery (CDR) for generating a clock and data from the amplified decision signal by the LA; and a control circuit for adjusting a decision threshold level depending on the received optical signal power by the PD and for providing the adjusted decision threshold level with the LA.

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Cited By (4)

    Publication numberPublication dateAssigneeTitle
    CN-101335571-BFebruary 15, 2012华为技术有限公司光接收装置、光网络系统及光接收方法
    CN-103532636-AJanuary 22, 2014黄山市光锐通信有限公司Optical module and receiving unit thereof
    CN-103532636-BFebruary 01, 2017黄山市光锐通信有限公司光模块及其接收单元
    WO-2010028558-A1March 18, 2010中兴通讯股份有限公司优化调整接收机判决电平的方法及其装置