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

fYear

2005

fDate

30 Nov.-2 Dec. 2005

Firstpage

179

Lastpage

182

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/RFIT.2005.1598905

Filename

1598905