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    • 8. 发明授权
    • Compensation circuit and method for a power transistor
    • 功率晶体管的补偿电路和方法
    • US06304129B1
    • 2001-10-16
    • US09415524
    • 1999-10-08
    • Cynthia BlairHenrik Sjoden
    • Cynthia BlairHenrik Sjoden
    • H03K1714
    • H03F3/191H03F1/301H03F2200/15H03F2200/18H03F2200/456
    • A circuit and method are disclosed for biasing a power transistor to offset unwanted variations in the operating characteristics thereof. The circuit includes a correction transistor having the same device structure as the structure of the power transistor. In addition, one or more dimensions of the correction transistor is scaled relative to corresponding dimensions of the power transistor. The correction transistor is biased so that the ratio of drain currents of the correction transistor and the power transistor is the same as the size ratio thereof. In this way, the output signal of the correction transistor is based upon an unwanted variation in the operating characteristics of the power transistor. The output terminal of the correction transistor is amplified and coupled to the control terminal of the power transistor so that the bias signal applied to the control terminal thereof offsets the unwanted variation in the operating characteristics of the power transistor.
    • 公开了用于偏置功率晶体管以消除其工作特性中的不期望的变化的电路和方法。 该电路包括具有与功率晶体管的结构相同的器件结构的校正晶体管。 此外,校正晶体管的一个或多个维度相对于功率晶体管的相应尺寸缩放。 校正晶体管被偏置,使得校正晶体管和功率晶体管的漏极电流的比率与其尺寸比相同。 以这种方式,校正晶体管的输出信号基于功率晶体管的工作特性的不期望的变化。 校正晶体管的输出端被放大并耦合到功率晶体管的控制端,使得施加到其控制端的偏置信号抵消功率晶体管的工作特性的不期望的变化。