Title :
A novel bias circuit and MMIC power amplifier implementation for W-CDMA mobile handsets
Author :
Noh, Youn S. ; Park, Jong H. ; Park, C.S.
Author_Institution :
Sch. of Eng., Inf. & Commun. Univ., Daejeon, South Korea
Abstract :
A novel bias circuit providing a stable quiescent current for temperature and regulated voltage variations is proposed and implemented for a W-CDMA MMIC power amplifier. The power amplifier with the proposed bias circuit has a quiescent current variation of only 6% for the -30°C to 90°C temperature range, and 8.5% for the 2.9V to 3.1V regulated voltage range, and the variation of the power gain at the 28dBm output power is less than ±0.8 (0.05) dB for ±0.1V of regulated voltage (±60°C of temperature) variation.
Keywords :
MMIC power amplifiers; circuit stability; code division multiple access; mobile handsets; -30 to 90 degC; 2.9 to 3.1 V; MMIC power amplifier; W-CDMA; bias circuit; mobile handsets; regulated voltage variations; stable quiescent current; temperature variations; Circuits; Heterojunction bipolar transistors; MMICs; Mobile handsets; Multiaccess communication; Power amplifiers; Radiofrequency amplifiers; Resistors; Temperature distribution; Voltage;
Conference_Titel :
Radio and Wireless Conference, 2004 IEEE
Print_ISBN :
0-7803-8451-2
DOI :
10.1109/RAWCON.2004.1389150
