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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:

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Envelope Tracking Video Tutorial by Radio-Electronics

Envelope Tracking Video Tutorial by Radio-Electronics - RF Cafe

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.

Posted November , 2015

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LOTUS Communications Systems Modular RF Component Building Blocks - RF Cafe