Title :
MMIC power amplifier with on-chip bias current controlling circuit for W-CDMA mobile handset
Author :
Noh, Y.S. ; Kim, Ji H. ; Park, C.S.
Author_Institution :
Sch. of IT Eng., Inf. & Commun. Univ., Daejeon
fDate :
12/5/2002 12:00:00 AM
Abstract :
A new on-chip bias current controlling circuit for efficiency enhancement has been devised and implemented to a W-CDMA InGaP/GaAs HBT MMIC power amplifier. It supplies a quiescent current of 86 (54) mA for a high (low) power mode operation. The reduced quiescent current at the low power mode operation improves the PAE as much as 21.6% at the output power of 20 dBm and 59.2% under 0 dBm output power compared to the high power mode operation only.
Keywords :
3G mobile communication; III-V semiconductors; MMIC power amplifiers; bipolar MMIC; code division multiple access; electric current control; gallium arsenide; gallium compounds; indium compounds; mobile handsets; 3G wireless communication systems; 54 mA; 86 mA; InGaP-GaAs; InGaP/GaAs HBT MMIC power amplifier; MMIC power amplifier; PAE; W-CDMA mobile handset; efficiency enhancement; high power mode operation; low power mode operation; on-chip bias current controlling circuit; output power; quiescent current; two-stage switching mode power amplifier MMIC;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20021122
