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    • 61. 发明授权
    • Level-shifting circuit with bipolar junction transistor
    • 具有双极结型晶体管的电平移位电路
    • US07688111B1
    • 2010-03-30
    • US12195725
    • 2008-08-21
    • Abhijit Ray
    • Abhijit Ray
    • H03K19/082H03K19/0175
    • H03K19/017509
    • A level-shifting circuit includes an input node, a first output transistor, a second output transistor, a pull-up transistor, and an output node. The input node receives an input signal. The first output transistor turns on when the input signal is at a first voltage level and couples an output node to a positive supply voltage when turned on. The second output transistor, a bipolar junction transistor (BJT), couples the output node to a negative supply voltage when turned on. The pull-up transistor turns on when the input signal is at a second voltage level and generates a voltage at a base terminal of the second output transistor that turns the second output transistor on. Additionally, the level-shifting circuit generates, at the output node, an output signal with a voltage swing that includes a positive voltage range and a negative voltage range.
    • 电平移动电路包括输入节点,第一输出晶体管,第二输出晶体管,上拉晶体管和输出节点。 输入节点接收输入信号。 当输入信号处于第一电压电平时,第一输出晶体管导通,并且当导通时将输出节点耦合到正电源电压。 第二输出晶体管,双极结型晶体管(BJT)在导通时将输出节点耦合到负电源电压。 当输入信号处于第二电压电平时,上拉晶体管导通,并在第二输出晶体管的基极端产生电压,使第二输出晶体管导通。 此外,电平移动电路在输出节点产生具有包括正电压范围和负电压范围的电压摆幅的输出信号。