Title :
High efficiency class-E switched mode power amplifier design and optimization with random search algorithm
Author :
Tabrizi, Mohammad Moghaddam ; Masoumi, Nasser
Author_Institution :
Dept. of Comput. Eng., Tehran Univ., Iran
Abstract :
The class E switched mode power amplifier consists of a load network and a single transistor that is operated as a switch at the carrier frequency of the output signal. Main three parts of the power amplifier that specify its total efficiency are: the Q factor of output band-pass filter, the transistor on-state resistance, and the driver stage. In this paper, we design and optimize three common structures of power amplifiers using a random search algorithm. Optimized designs are simulated with HSPICE in 0.25 μm CMOS technology at the carrier frequency of 5.2 GHz. The maximum efficiency for each structure is calculated, and then its bottle-neck is determined. We also achieve the total efficiency of 92.3% for the power amplifier.
Keywords :
SPICE; circuit CAD; circuit optimisation; differential amplifiers; power amplifiers; simulated annealing; switched networks; 0.25 micron; 5.2 GHz; CMOS technology; HSPICE; Q factor; band pass filter; carrier frequency; circuit CAD; class-E switched mode power amplifier design; optimization; random search algorithm; transistor onstate resistance; Algorithm design and analysis; Band pass filters; CMOS technology; Design optimization; Frequency; High power amplifiers; Power amplifiers; Q factor; Switched-mode power supply; Switches;
Conference_Titel :
Microelectronics, 2004. ICM 2004 Proceedings. The 16th International Conference on
Print_ISBN :
0-7803-8656-6
DOI :
10.1109/ICM.2004.1434268
