Envelope tracking (ET) is a technique designed to enhance the efficiency of radio frequency
power amplifiers (RF PA). It is based on providing the voltage to the RF PA with variations
that mimic the shape of the envelope of the communication signal that the RF PA is
processing. As the bandwidth of these signals can be around several megahertz, the
switching frequency of the switching mode power supply designed for ET applications has to
be very high. The good switching characteristics of Gallium Nitride devices makes them …

Envelope Tracking (ET) is a technique designed to enhance the efficiency of Radio
Frequency Power Amplifiers (RF PA). It is based on providing the voltage to the RF PA with
variations that mimic the shape of the envelope of the communications signal that the RF PA
is processing. As the bandwidth of these signals can be around several MHz, the switching
frequency of the switching mode power supply designed for ET applications has to be very
high. The good switching characteristics of Gallium Nitride devices makes them suitable for …