Multi-mode radio frequency (RF) power amplifier circuit
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United States of America Patent
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Jun 5, 2018
Issued Date -
N/A
app pub date -
May 16, 2017
filing date -
Nov 15, 2016
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Abstract
A multi-mode radio frequency (RF) power amplifier circuit is disclosed. The multi-mode RF power amplifier circuit can operate in a low-resource block (RB) mode and a high-RB mode. The multi-mode RF power amplifier circuit includes a driver stage power amplifier and an output stage power amplifier to amplify an RF input signal and generate an RF output signal. A control circuit is configured to provide a constant envelope voltage and an envelope tracking (ET) supply voltage to the driver stage power amplifier and the output stage power amplifier, respectively, in the high-RB mode. As a result, it is possible to optimize RF performance and reduce sensitivity of the driver stage power amplifier and the output stage power amplifier in the high-RB mode, without increasing costs and footprint of the multi-mode RF power amplifier circuit.
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