Title :
A 20 mA quiescent current CV/CC parallel operation HBT power amplifier for W-CDMA terminals
Author :
Shinjo, S. ; Mori, K. ; Ueda, H. ; Ohta, A. ; Seki, H. ; Suematsu, N. ; Takagi, T.
Author_Institution :
Inf. Technol. R&D Center, Mitsubishi Electr. Corp., Kanagawa, Japan
Abstract :
A novel constant voltage/constant current (CV/CC) parallel operation HBT power amplifier (PA) configuration is proposed. By combining two HBT´s having different base bias circuits for each (one is CV and the other is CC), non-linearity at large back-off region can be canceled out. Therefore, both low quiescent current and enough ACPR performance can be achieved. The fabricated CV/CC parallel operation HBT PA demonstrates extremely low quiescent current of 20 mA and ACPR of less than -38 dBc at the output power range up to 27.5 dBm.
Keywords :
UHF integrated circuits; UHF power amplifiers; bipolar MMIC; bipolar analogue integrated circuits; code division multiple access; heterojunction bipolar transistors; 20 mA; ACPR; HBT power amplifier; W-CDMA terminals; back-off region; base bias circuits; constant voltage / constant current parallel operation; output power range; pinch-off region; quiescent current; Circuits; Heterojunction bipolar transistors; High power amplifiers; Multiaccess communication; Operational amplifiers; Optical amplifiers; Power amplifiers; Power generation; Semiconductor optical amplifiers; Voltage;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2002 IEEE
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-7246-8
DOI :
10.1109/RFIC.2002.1012042
