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    • 9. 发明授权
    • Rail-to-rail follower circuits
    • 轨到轨跟随器电路
    • US09467107B2
    • 2016-10-11
    • US14203461
    • 2014-03-10
    • Freescale Semiconductor, Inc.
    • Ricardo P. CoimbraEdevaldo Pereira Silva, Jr.Andre L. Couto
    • H03F3/45H03F1/42H03F3/30H03F3/50
    • H03F3/3016H03F3/4521H03F3/505H03F2200/513H03F2200/69H03F2203/30091H03F2203/30123H03F2203/45274
    • In some embodiments, a source follower circuit may include a first level shifter configured to receive an input voltage; an N-type Metal-Oxide-Semiconductor (NMOS) transistor having a gate terminal coupled to an output of the first level shifter; a second level shifter configured to receive the input voltage; a P-type Metal-Oxide-Semiconductor (PMOS) transistor having a gate terminal coupled to an output of the second level shifter and a source terminal coupled to a source terminal of the NMOS transistor; and an amplifier configured to receive the input voltage and to output a current at a node between the source terminal of the NMOS transistor and the source terminal of the PMOS transistor, wherein the current is determined based upon a difference between the input voltage and a reference voltage.
    • 在一些实施例中,源跟随器电路可以包括被配置为接收输入电压的第一电平移位器; N型金属氧化物半导体(NMOS)晶体管,其具有耦合到所述第一电平移位器的输出的栅极端子; 配置为接收所述输入电压的第二电平移位器; 具有耦合到第二电平移位器的输出的栅极端子和耦合到NMOS晶体管的源极端子的源极的P型金属氧化物半导体(PMOS)晶体管; 以及放大器,被配置为接收所述输入电压并且在所述NMOS晶体管的源极端子和所述PMOS晶体管的源极端子之间的节点处输出电流,其中所述电流基于所述输入电压和参考值之间的差异来确定 电压。