Title :
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
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;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium (RFIC), 2012 IEEE
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4673-0413-9
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2012.6242241
