Title :
A Design of 2.6 GHz Auto-Biasing Cascode Class-E PA with Vdd/AM and Vdd /PM Compensations in EER System
Author :
Tsou, Wen-An ; Wuen, Wen-Shen ; Wen, Kuei-Ann
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
An auto-biasing cascode class-E PA which can compensate the Vdd/AM and Vdd/PM distortion resulting from supply modulation has been proposed. The output voltage of auto-biasing control circuit is generated and varied linearly with PApsilas supply voltage so that the cascode transistor is degenerated into a resistance and the PApsilas nonlinear distortion can be compensated. The simulation result shows that the distortion is compensated evidently and the system co-simulation demonstrated that system EVM can be improved from -17 to -19 dB. Also, the drain efficiency of the PA can be improved 15% within small supply voltage range.
Keywords :
UHF power amplifiers; nonlinear distortion; reliability; auto-biasing control circuit; cascode transistor; class-E power amplifiers; frequency 2.6 GHz; nonlinear distortion; CMOS technology; Circuit simulation; Impedance; Linearity; Nonlinear distortion; Power amplifiers; Radiofrequency amplifiers; Stress; Transmitters; Voltage; class-E power amplifier; envelope elimination and restoration (EER); transmitters;
Conference_Titel :
Circuits, Communications and Systems, 2009. PACCS '09. Pacific-Asia Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-0-7695-3614-9
DOI :
10.1109/PACCS.2009.109
