Envelope Tracking Video Tutorial by Radio-Electronics
Ian Poole, of the Radio-Electronics website, has produced an excellent video
tutorial on the subject of envelope tracking
usage in modern radios (aka cellphones). A combination of clear diagrams, interviews with design engineers, and live screen shots of signal
behavior is used to effectively illustrate the principles without going into gory mathematical detail. If you have ever wondered why cellphone
power amplifier (PA) companies like Qorvo (RFMD), Skyworks, and Peregrine also make and sell DC-DC converter and DC power management ICs, this
video will answer the question.
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