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Power/Alternative Energy  

Optimise RF PA efficiency to improve handset's talk-time

Posted: 26 Jun 2006     Print Version  Bookmark and Share

Keywords:PA  amplitude-modulation  phase-modulation  DC-DC switching converters 

A mobile handset isn't just a phone anymore, it's an MP3 player, a fashion statement, a GPS device, etc. Cellular providers have increased the services bundled with 3G phones and at the same time, an expectation to increase the talk time and battery life with the same or slightly higher capacity batteries makes system design challenging.

The requirement for linear PAs in systems that have both amplitude- and phase- modulation components require system designers to balance linearity and efficiency requirements in new handset designs. The use of DC-DC switching converters to supply the optimal voltage to the RF PA improves average PA efficiency based on typical RF power transmit probability distributions for WCDMA systems.

View the PDF document for more information.





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