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A 2.7-V 900-MHz CMOS LNA and mixer

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1 Author(s)
Karanicolas, A.N. ; AT&T Bell Labs., Holmdel, NJ, USA

A CMOS low-noise amplifier (LNA) and a mixer for RF front-end applications are described. A current reuse technique is described that increases amplifier transconductance for the LNA and mixer without increasing power dissipation, compared to standard topologies. At 900 MHz, the LNA minimum noise figure (NF) is 1.9 dB, input third-order intercept point (IIP3) is -3.2 dBm and forward gain is 15.6 dB. With a 1-GHz local oscillator (LO) and a 900-MHz RF input, the mixer minimum double sideband noise figure (DSB NF) is 5.8 dB, IIP3 is -4.1 dBm, and power conversion gain is 8.8 dB. The LNA and mixer, respectively, consume 20 mW and 7 mW from a 2.7 V power supply. The active areas of the LNA and mixer are 0.7 mm×0.4 mm and 0.7 mm×0.2 mm, respectively. The prototypes were fabricated in a 0.5-μm CMOS process

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:31 ,  Issue: 12 )