Title :
A 2.4GHz Power Amplifier Driver used in a WLAN IEEE 802.11b/g Transmitter Front-End
Author :
Zhang, Xuelian ; Yan, Jun ; Shi, Yin ; Dai, Fa Foster
Author_Institution :
Inst. of Semicond., Chinese Acad. of Sci., Beijing
Abstract :
This paper presents a 2.4 GHz power amplifier driver used in a WLAN IEEE 802.11b/g transmitter front-end which employs a walking IF architecture. The power amplifier driver is implemented in a 50 GHz 0.5 mum SiGe BiCMOS technology. And it consists of a differential cascode amplifier stage, an emitter follower and a common-emitter amplifier. It dissipates 28 mA current under a 3.3 V power supply, and occupies 0.5x0.56 mm2 die areas. The power amplifier driver exhibits 12dB power gain and delivers -10 dBm power to an off-chip power amplifier with 50 Omega input impedance. It has good suppression of LO and image spurs, and its IIP3 is +10.2 dBm.
Keywords :
BiCMOS integrated circuits; Ge-Si alloys; differential amplifiers; power amplifiers; radio transmitters; wireless LAN; SiGe; SiGe BiCMOS technology; WLAN IEEE 802.11b/g transmitter front-end; common-emitter amplifier; current 28 mA; differential cascode amplifier; emitter follower; frequency 2.4 GHz; frequency 50 GHz; gain 12 dB; power amplifier driver; size 0.5 mum; voltage 3.3 V; walking IF architecture; BiCMOS integrated circuits; Differential amplifiers; Driver circuits; Germanium silicon alloys; Legged locomotion; Power amplifiers; Power supplies; Silicon germanium; Transmitters; Wireless LAN;
Conference_Titel :
Circuits and Systems for Communications, 2008. ICCSC 2008. 4th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1707-0
Electronic_ISBN :
978-1-4244-1708-7
DOI :
10.1109/ICCSC.2008.19
