A tunable differential duplexer in 90nm CMOS

Author

Abdelhalem, Sherif H. ; Gudem, Prasad S. ; Larson, Lawrence E.

Author_Institution

Univ. of California at San Diego, La Jolla, CA, USA

fYear

2012

fDate

17-19 June 2012

Firstpage

101

Lastpage

104

Abstract

An integrated duplexer for frequency division duplex wireless standards around 2GHz is presented. The duplexer utilizes a differential version of a planar hybrid transformer to enable wideband differential to differential and differential to common-mode isolation between the transmitter and receiver. It covers WCDMA bands I, II, III, and IX, with worst-case isolation of 60dB and 40dB at the TX and RX frequencies respectively. The duplexer with a cascaded LNA achieves a noise figure of 5.6dB, and 14dB of gain. The insertion loss in the TX path is 3.7dB. The duplexer and LNA, implemented in a 90nm CMOS process, consume 20mA and occupy an active area of 0.6mm².

Keywords

CMOS analogue integrated circuits; UHF amplifiers; differential transformers; low noise amplifiers; radio receivers; radio transmitters; CMOS process; RX frequencies; TX frequencies; WCDMA bands I; WCDMA bands II; WCDMA bands III; WCDMA bands IX; cascaded LNA; current 20 mA; differential to common-mode isolation; frequency division duplex wireless standards; gain 14 dB; gain 40 dB; gain 60 dB; loss 3.7 dB; noise figure 5.6 dB; planar hybrid transformer; receiver; size 90 nm; transmitter; tunable differential integrated duplexer; wideband differential to differential; Antennas; Couplings; Impedance; Insertion loss; Linearity; Loss measurement; Noise figure; CMOS process; Cellular phones; WCDMA; duplexers; tunable circuits and devices;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits Symposium (RFIC), 2012 IEEE

Conference_Location

Montreal, QC

ISSN

1529-2517

Print_ISBN

978-1-4673-0413-9

Electronic_ISBN

1529-2517

Type

conf

DOI

10.1109/RFIC.2012.6242241

Filename

6242241