Cart (Loading....) | Create Account
Close category search window
 

10 MHz large signal bandwidth, 95% efficient power supply for 3G-4G cell phone base stations

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Norris, M. ; Dept. of Electr., Comput. & Energy Eng., Univ. of Colorado, Boulder, CO, USA ; Maksimovic, D.

To improve the efficiency of cell phone base station transmitters, it is desirable to run the RF Power Amplifier (RFPA) with an envelope modulating power supply that provides the RFPA with the voltage and current needed for maximum efficiency. However, cell phone transmission varies the RF output power considerably over short periods, with the average power significantly less than the peak transmission power, which is difficult for traditional power supplies to support efficiently. This paper describes a switched-mode 8-phase buck envelope modulating power supply with a lookup table that varies the duty cycle and operating frequency to maintain soft switching under all operating conditions, and with dynamic timing correction to keep the phases uniformly distributed in time except when tracking signal dynamics that require simultaneous switching of multiple phases. The power supply does not require active compensation to keep the phase currents balanced. The experimentally demonstrated power supply provides 10 MHz large signal bandwidth, >;40 A/μsec current slew rate, with switching frequency of up to 15 MHz at 95% efficiency. The supply is suitable for 2-carrier WCDMA and LTE cell phone base stations.

Published in:

Applied Power Electronics Conference and Exposition (APEC), 2012 Twenty-Seventh Annual IEEE

Date of Conference:

5-9 Feb. 2012

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.