Fully Integrated Switch-LNA Front-End IC Design in CMOS: A Systematic Approach for WLAN

Author

Madan, Anuj ; McPartlin, Michael J. ; Zhou, Zhan-Feng ; Huang, Chun-Wen Paul ; Masse, Christophe ; Cressler, John D.

Volume

46

Issue

11

fYear

2011

Firstpage

2613

Lastpage

2622

Abstract

A fully integrated front-end IC is demonstrated for 802.11b/g transceivers with integrated power amplifiers. The SP3T-LNA architecture integrates Bluetooth® functionality with transmit and receive for wireless LAN. The transmit switch achieves a P_1dB greater than 33.0 dBm at 2.5 GHz by employing a cross-biasing approach, transistor stacking and deep n-well process. Power handling techniques used for the switches and the associated performance tradeoffs are discussed. The measured noise figure of the LNA and the receive chain comprising both an LNA and a switch is 1.5 dB and 3.0 dB, respectively. The LNA achieves an IIP3 of 7.0 dBm while consuming 7.0 mA of current. The measured switching times are less than 350 ns. The front-end IC employs a 3.3 V supply and occupies 0.64 mm² in 0.18 μm bulk CMOS technology.

Keywords

Bluetooth; CMOS integrated circuits; UHF power amplifiers; low noise amplifiers; radio transceivers; wireless LAN; 802.11b/g transceivers; Bluetooth; CMOS integrated circuit; SP3T-LNA; WLAN; bulk CMOS technology; cross-biasing; current 7.0 mA; deep n-well process; frequency 2.5 GHz; front-end integrated circuit design; fully integrated switch-LNA; integrated power amplifiers; noise figure 1.5 dB; noise figure 3.0 dB; size 0.18 mum; transistor stacking; voltage 3.3 V; Bluetooth; FETs; Insertion loss; Radio frequency; Switches; Switching circuits; Wireless LAN; CMOS; FEIC; T/R switch; switched LNA; wireless LAN;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2011.2166216

Filename

6043879