Citation
García Suárez, Oscar and Vasic, Miroslav and Alou Cervera, Pedro and Oliver Ramírez, Jesús Angel and Díaz López, Daniel and Cheng, Pengming and Cobos Márquez, José Antonio
(2011).
Series combination of a switched dc-dc converter and a linear regulator for high frequency RF envelope amplifier.
In: "Proceedings XXVI Simposio de la URSI (Unión Científica Internacional de Radio)", 07/09/2011 - 09/09/2011, Leganés (Spain). pp. 1-8.
Abstract
Classical linear amplifiers such as A, AB and B offer very good linearity suitable for RF power amplifiers. However, its inherent low efficiency limits its use especially in base-stations that manage tens or hundreds of Watts. The use of linearization techniques such as Envelope Elimination and Restoration (EER) allow an increase of efficiency keeping good linearity. This technique requires a very fast dc-dc power converter to provide variable voltage supply to the power amplifier. In this paper, several alternatives are analyzed to implement the envelope amplifier based on a cascade association of a switched dc-dc converter and a linear regulator. A simplified version of this approach is also suitable to operate with Envelope Tracking technique.
