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发明公开
CN106797203A 用于降低功率放大器中电源灵敏度的电路和方法 失效 - 放弃专利权

用于降低功率放大器中电源灵敏度的电路和方法
摘要：
在一个实施例中，本公开包括一种包括第一功率放大器级的电路，具有用于接收输入信号的输入端，耦合至输出节点的输出端，第一功率放大器级接收时变电源电压。方法进一步包括与第一功率放大器并联配置的第二功率放大器级，具有用于接收输入信号的输入端，耦合至输出节点耦合的输出端，第二功率放大器级接收时变电源电压。当电源电压在第一低电压范围中时第一功率放大器级的第一增益减小，以及第二功率放大器级的第二增益补偿在第一低电压范围中第一功率放大器级的减小的增益。
摘要（英）：

In one embodiment, the present disclosure includes a circuit comprising a first power amplifier stage having an input to receive an input signal, an output coupled to an output node, the first power amplifier stage receiving a time-varying power supply voltage. The circuit further includes a second power amplifier stage configured in parallel with the first power amplifier stage having an input to receive the input signal, an output coupled to the output node, the second power amplifier stage receiving the time-varying power supply voltage. A first gain of the first power amplifier stage decreases when the power supply voltage is in a first low voltage range, and a second gain of the second power amplifier stage compensates for the decreasing gain of the first power amplifier stage in the first low voltage range.

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