Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
144 IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 53, NO. 1, JANUARY 2005 Design of High-Efficiency Current-Mode
 

Summary: 144 IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 53, NO. 1, JANUARY 2005
Design of High-Efficiency Current-Mode
Class-D Amplifiers for Wireless Handsets
Tsai-Pi Hung, Student Member, IEEE, Andre G. Metzger, Student Member, IEEE,
Peter J. Zampardi, Senior Member, IEEE, Masaya Iwamoto, Member, IEEE, and Peter M. Asbeck, Fellow, IEEE
Abstract--Design considerations are discussed for current-mode
class-D (CMCD) microwave power amplifiers. Factors affecting
amplifier efficiency are described analytically and via simulation.
Amplifiers are reported that incorporate parallel LC resonators
alongside the switching transistors. To reduce parasitic resistance,
bond-wires were utilized to implement a high inductor in the LC
resonator. An experimental CMCD amplifier based on GaAs HBTs
is reported, with collector efficiency of 78.5% at an output power
of 29.5 dBm (0.89 W) at 700 MHz.
Index Terms--Bond-wire inductor, class-D, high efficiency,
power amplifiers.
I. INTRODUCTION
POWER-AMPLIFIER efficiency is a significant factor for
the efficiency of most wireless systems. Poor efficiency of
the last power-amplifier stage leads to large energy loss, not only

  

Source: Asbeck, Peter M. - Department of Electrical and Computer Engineering, University of California at San Diego

 

Collections: Engineering