A Technical Foundation for RF CMOS Power Amplifiers: Part 6: Relating Envelope Tracking and Polar PA Operation

This article completes the series based on my presentation in the Advanced RF CMOS Transmitter Techniques Forum at the 2015 International Solid State Circuits Conference. This article series provides more details than the presentation time at the forum allowed. This last article looks at envelope tracking (ET) and direct polar (DP) transmitters-why they matter and how to tell the difference between them.