首页>
外国专利>
Apparatus and method for assisting envelope tracking with transient response in supply voltage for power amplifier
Apparatus and method for assisting envelope tracking with transient response in supply voltage for power amplifier
展开▼
机译:用于辅助电源电压电源电压瞬态响应的包络跟踪的装置和方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A power amplifier (PA) circuit includes a circuit for generating a supply voltage at an upper voltage rail for a power amplifier (PA). The circuit includes a DC-to-DC converter for generating a voltage from which the supply voltage is generated; a linear amplifier for sourcing or sinking current to or from the upper voltage rail via a capacitor for performing fine adjustment of the supply voltage; a first switching device coupled between an output of the linear amplifier and a lower voltage rail to selectively assist the linear amplifier sink current through the capacitor to deal with actual or anticipated transient response of the supply voltage; and a second switching device coupled between the upper voltage rail and the lower voltage rail to selectively discharge the capacitor in response to actual or anticipated transient response of the supply voltage.
展开▼