Title:
APPARATUS AND METHOD FOR IMPROVING EFFICIENCY IN POWER AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2013/055170
Kind Code:
A1
Abstract:
An apparatus and method for enhancing the whole efficiency of power amplification in a supply modulated amplifier are provided. The power amplification apparatus includes a controller, a Doherty power amplifier, and a supply modulated amplifier. The controller selects a power amplifier among the Doherty power amplifier and the supply modulated amplifier. The Doherty power amplifier amplifies a power of a transmission signal when the Doherty power amplifier is selected by the controller. The supply modulated amplifier amplifies the power of the transmission signal using a supply voltage determined considering the amplitude of the transmission signal, when the supply modulated amplifier is selected by the controller.
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Inventors:
BAEK SANG-HYUN (KR)
LEE JAE-HYUK (KR)
LIM HYUNG-SUN (KR)
CHOI SUNG-YOUL (KR)
LEE JAE-HYUK (KR)
LIM HYUNG-SUN (KR)
CHOI SUNG-YOUL (KR)
Application Number:
PCT/KR2012/008354
Publication Date:
April 18, 2013
Filing Date:
October 15, 2012
Export Citation:
Assignee:
SAMSUNG ELECTRONICS CO LTD (KR)
International Classes:
H03F3/24; H03F1/06
Foreign References:
| US20050064830A1 | 2005-03-24 |
Other References:
CHIEN-JUNG LI ET AL.: "High Average-Efficiency Multimode RF Transmitter Using a Hybrid Quadrature Polar Modulator", IEEE TRANSACTIONS ON CIRCUITS AND SYSTEM S-II: EXPRESS BRIEFS, vol. 55, no. 3, March 2008 (2008-03-01), pages 249 - 253, XP011333847
ILDU KIM ET AL.: "Optimized Envelope Shaping for Hybrid EER Transmitter of Mobile WiMAX Optimized ET Operation", IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, vol. 19, no. 5, May 2009 (2009-05-01), pages 335 - 337, XP011347525
JUNGHWAN MOON ET AL.: "Doherty amplifier with envelope tracking for high efficiency", IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, 23 May 2010 (2010-05-23), pages 1086 - 1089, XP031714476
ILDU KIM ET AL.: "Optimized Envelope Shaping for Hybrid EER Transmitter of Mobile WiMAX Optimized ET Operation", IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, vol. 19, no. 5, May 2009 (2009-05-01), pages 335 - 337, XP011347525
JUNGHWAN MOON ET AL.: "Doherty amplifier with envelope tracking for high efficiency", IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, 23 May 2010 (2010-05-23), pages 1086 - 1089, XP031714476
Attorney, Agent or Firm:
KWON, Hyuk-Rok et al. (Gyeonghuigung-gilJongro-gu, Seoul 110-062, KR)
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Claims: