Title :
A Fast CMOS Self-Oscillating Modulator for RF Power Amplifier
Author :
Wang, Xin Jie ; Kwasniewski, Tad
Author_Institution :
Carleton Univ., Ottawa
Abstract :
This paper presents a fast CMOS self-oscillating modulator for RF power amplifier. This modulator has been designed in 0.18-mum CMOS technology which occupies an area of 1.5times2 mm2 and consists of an envelope detector, an envelope amplifier, a fast comparator and an output buffer. The modulator can be applied for both EERPA and DSPA. Simulation results show that the modulator achieves efficiency > 81%, the highest output voltage is close to 1.7V, current >100 mA.
Keywords :
CMOS analogue integrated circuits; UHF power amplifiers; modulators; CMOS self-oscillating modulator; RF power amplifier; dynamic supply power amplifier; envelope amplifier; envelope elimination; fast comparator; frequency 2 GHz; output buffer; restoration power amplifier; Broadband amplifiers; CMOS technology; Envelope detectors; High power amplifiers; Linearity; Operational amplifiers; Power amplifiers; Radio frequency; Radiofrequency amplifiers; Rail to rail amplifiers;
Conference_Titel :
Electrical and Computer Engineering, 2007. CCECE 2007. Canadian Conference on
Conference_Location :
Vancouver, BC
Print_ISBN :
1-4244-1020-7
Electronic_ISBN :
0840-7789
DOI :
10.1109/CCECE.2007.99
