Title :
A differential variable gain SiGe BiCMOS LNA design using current splitting and feedback techniques
Author :
Tai, Chiung-Feng ; Tsai, Chih-Yu ; Chiou, Hwann-Kaeo
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ., Chung-li, Taiwan
fDate :
30 Nov.-2 Dec. 2005
Abstract :
A differential variable gain low noise amplifier (DVGLNA) using the 0.35 μm 3P3M SiGe BiCMOS process is described in this work. The differential LNA with gain control and high linearity has been developed for WCDMA applications. Using this gain control topology, differential variable gain LNA remains its input and output return loss in both high gain and low gain mode. The circuit measurement is performed by using a FR-4 PCB test fixture. The differential LNA achieves gain of 16.5 dB, noise figure of 2.1 dB, the third-order intercept point of -2 dBm, and the gain control range of 11 dB.
Keywords :
BiCMOS integrated circuits; broadband networks; code division multiple access; differential amplifiers; feedback; germanium alloys; integrated circuit design; low noise amplifiers; network topology; printed circuits; silicon alloys; 16.5 dB; 2.1 dB; BiCMOS LNA design; PCB test fixture; SiGe; WCDMA applications; current splitting; differential variable gain low noise amplifier; feedback techniques; gain control topology; BiCMOS integrated circuits; Circuit testing; Differential amplifiers; Feedback; Gain control; Germanium silicon alloys; Linearity; Low-noise amplifiers; Multiaccess communication; Silicon germanium; Low noise amplifier; WCDMA; current splitting;
Conference_Titel :
Radio-Frequency Integration Technology: Integrated Circuits for Wideband Communication and Wireless Sensor Networks, 2005. Proceedings. 2005 IEEE International Workshop on
Print_ISBN :
0-7803-9372-4
DOI :
10.1109/RFIT.2005.1598905
