POWER SUPPLIES FOR RF POWER AMPLIFIER

Switched-mode power supplies (SMPSs) and their control methods for radio frequency (RF) power amplifiers in bat- tery-powered wireless transmitter de vices. According to embodiments of the invention, a Boost-type SMPS and a Bu ck-type SMPS in cascade connection are controlled so that high efficiency...

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Bibliographische Detailangaben
1. Verfasser:	MURTOJARVI, SIMO
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AMPLIFIERS APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS BASIC ELECTRONIC CIRCUITRY CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	Switched-mode power supplies (SMPSs) and their control methods for radio frequency (RF) power amplifiers in bat- tery-powered wireless transmitter de vices. According to embodiments of the invention, a Boost-type SMPS and a Bu ck-type SMPS in cascade connection are controlled so that high efficiency is maintained for various loads and transmission power levels. The Boost SMPS and the Buck SMPS can be controlled based on the mode of operation of the tr ansmitter, such as the actual battery voltage, the needed output power, the selected frequency band, the selected RF power amplifier (PA), the selected modulation method of the transmission signal, and/or the selected PA voltage control method, such as the envelope elimination and restoration (EER) tech nique, the envelope tracking (ET) technique, or the power-level tracking (PT ).