Title :
Current-mode class-D power amplifiers for high-efficiency RF applications
Author :
Kobayashi, Hidenori ; Hinrichs, Jeffrey M. ; Asbeck, Peter M.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
fDate :
12/1/2001 12:00:00 AM
Abstract :
We show that current-mode class-D (CMCD) power amplifiers can achieve high efficiency at RF frequencies. In contrast with conventional voltage-mode class-D amplifiers, the CMCD features "zero voltage switching," which eliminates the output capacitance discharge loss. Experimental CMCD amplifiers with 76.3% power-added efficiency (PAE) at 290-mW output and 71.3% PAE at 870-mW output are demonstrated using GaAs FETs at 900 MHz
Keywords :
MESFET integrated circuits; UHF integrated circuits; UHF power amplifiers; current-mode circuits; field effect analogue integrated circuits; power integrated circuits; 290 mW; 870 mW; 900 MHz; GaAs; MESFET power amplifiers; current-mode class-D power amplifiers; drain efficiency; high bandwidth; high-efficiency RF applications; loss mechanism; model parameters; power-added efficiency; switching-mode power amplifiers; wireless communications; zero voltage switching; Circuits; Communication switching; Gallium arsenide; High power amplifiers; Parasitic capacitance; Power amplifiers; Radio frequency; Radiofrequency amplifiers; Switches; Zero voltage switching;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
