Radio frequency power amplifier with low dynamic error vector magnitude

摘要

Embodiments provide a multi-stage radio frequency (RF) power amplifier (PA) having a low dynamic error vector magnitude (EVM). A first stage of the RF PA may include a first active device configured to receive an enable signal and to turn on in response to the enable signal, thereby activating the first stage. The RF PA may further include a second active device coupled in series with the first active device and configured to receive a main supply voltage. The second active device may provide a first supply voltage across the first active device that is less than and independent of the main supply voltage. One of the first active device or the second active device may be configured to receive an RF input signal and to pass an amplified RF output signal to a second stage of the RF PA circuit.