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    • 2. 发明授权
    • Image signal input circuit
    • 图像信号输入电路
    • US08184207B2
    • 2012-05-22
    • US12759875
    • 2010-04-14
    • Shigeki MabuchiAtsushi WatanabeMakoto SeinoNagayoshi Dobashi
    • Shigeki MabuchiAtsushi WatanabeMakoto SeinoNagayoshi Dobashi
    • H04N5/18
    • H04N5/18
    • An image signal input circuit includes an input terminal configured to receive an image signal, a clamp circuit configured to hold a sink chip voltage contained in the image signal to be a constant value, a level shift circuit that includes a first emitter follower having a first transistor and a first current source, and a second emitter follower having a second transistor and a second current source, a base of the second transistor being connected to an emitter of the first transistor, and that is configured to shift a level of the sink chip voltage which is held constant, and an electric current source configured to attract a base current of the first transistor.
    • 图像信号输入电路包括被配置为接收图像信号的输入端子,被配置为将包含在图像信号中的吸收芯片电压保持为恒定值的钳位电路;电平移位电路,包括具有第一 晶体管和第一电流源,以及具有第二晶体管和第二电流源的第二射极跟随器,所述第二晶体管的基极连接到所述第一晶体管的发射极,并且被配置为移位所述漏极芯片的电平 保持恒定的电压和被配置为吸引第一晶体管的基极电流的电流源。