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CN103270465A 用于过程变化和电源调制的准确偏置跟踪 失效 - 权利终止

用于过程变化和电源调制的准确偏置跟踪
摘要：
一种电流镜包括偏置支路，偏置支路包括：在电压源与接地之间串联的第一晶体管和第二晶体管；在电压源与接地之间耦合的分压器；以及运算放大器，被配置为接收分压器的分压电压和在第一晶体管与第二晶体管之间的节点的电压，并且驱动第二晶体管的栅极以将节点拉向分压电压。该电流镜还包括耦合到偏置支路的功率放大器核心。功率放大器核心包括在电压源与接地之间串联配置的第一驱动晶体管和第二驱动晶体管。耦合第一晶体管和第一驱动晶体管的栅极，并且耦合第二晶体管和第二驱动晶体管的栅极。
摘要（英）：

A current mirror includes a bias branch, which includes first and second transistors in series between a voltage source and ground, a voltage divider coupled between the voltage source and ground, an op-amp configured to receive a divided voltage of the voltage divider and a voltage of a node between the first and second transistors, and drive a gate of the second transistor to pull the node to the divided voltage. The current mirror further includes a power amplifier core coupled to the bias branch. The power amplifier core includes first and second drive transistors configured in series between the voltage source and ground. Gates of the first transistor and the first drive transistor are coupled, and gates of the second transistor and the second drive transistor are coupled.

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