Title :
A CMOS class-E Power Amplifiers with Power Control
Author :
Gao, Tongqiang ; Li, DongMei ; Chi, Baoyong ; Wang, ZhiHua
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing
Abstract :
In this paper, a CMOS class-E power amplifier with power control is presented. Its output power could be varied over a broad range with high efficiency by utilizing the combination of the parallel amplification technique and the drain modulation technique. The drain modulation is implemented as a class-S modulator and the output powers of the parallel amplifiers are combined with quarter-wavelength transmission lines. The simulation results show that the power amplifier could achieves a maximum power-added efficiency (PAE) of 47.9% and maintain a PAE higher than 41% over the 140-700mW output power range.
Keywords :
CMOS analogue integrated circuits; power amplifiers; power control; 140 to 700 mW; CMOS class-E power amplifiers; class-S modulator; drain modulation; parallel amplification; parallel amplifiers; power control; quarter-wavelength transmission lines; CMOS process; Digital control; High power amplifiers; Power amplifiers; Power control; Power generation; Pulse amplifiers; Radiofrequency amplifiers; Switches; Voltage;
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
DOI :
10.1109/ISCAS.2007.377891
