A 60GHz variable-gain LNA in 65nm CMOS

A four-stage 60 GHz low-noise amplifier is implemented in 65 nm CMOS with nMOS ft of 210 GHz. The LNA incorporates a reflection-type attenuator to provide variable gain with improved linearity in low-gain mode and a tunable notch filter for image rejection. The LNA, which consists of two common-source stages followed by two cascode stages, consumes 30.8 mW and achieves 5.9 dB NF and 15 dB gain at 60 GHz. The variable attenuator provides 10 dB of gain variation with the input-referred 1 dB compression point of the LNA being -15.1 dBm in high gain mode and -6 dBm in the low-gain mode. Each tunable notch filter stage provides an additional 8 dB attenuation of 37 GHz image signals, with the four-stage LNA achieving more than 35 dB image-rejection.

[1]  Ulrich Langmann,et al.  A 22.3dB Voltage Gain 6.1dB NF 60GHz LNA in 65nm CMOS with Differential Output , 2008, 2008 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.

[2]  R.W. Brodersen,et al.  Design of CMOS for 60GHz applications , 2004, 2004 IEEE International Solid-State Circuits Conference (IEEE Cat. No.04CH37519).

[3]  J. Laskar,et al.  A Single-Chip 25pJ/bit Multi-Gigabit 60GHz Receiver Module , 2007, 2007 IEEE/MTT-S International Microwave Symposium.

[4]  Daquan Huang,et al.  A 60GHz CMOS Differential Receiver Front-End Using On-Chip Transformer for 1.2 Volt Operation with Enhanced Gain and Linearity , 2006, 2006 Symposium on VLSI Circuits, 2006. Digest of Technical Papers..

[5]  B. Gaucher,et al.  A Silicon 60-GHz Receiver and Transmitter Chipset for Broadband Communications , 2006, IEEE Journal of Solid-State Circuits.

[6]  P.F.M. Smulders,et al.  Exploiting the 60 GHz band for local wireless multimedia access: prospects and future directions , 2002, IEEE Commun. Mag..

[7]  Huei Wang,et al.  A Miniature V-band 3-Stage Cascode LNA in 0.13/spl mu/m CMOS , 2006, 2006 IEEE International Solid State Circuits Conference - Digest of Technical Papers.

[8]  P. Schvan,et al.  Algorithmic Design of CMOS LNAs and PAs for 60-GHz Radio , 2007, IEEE Journal of Solid-State Circuits.

[9]  D. Ritter,et al.  An ultra low power LNA with 15dB gain and 4.4db NF in 90nm CMOS process for 60 GHz phase array radio , 2008, 2008 IEEE Radio Frequency Integrated Circuits Symposium.

[10]  B. Razavi,et al.  A 60-GHz CMOS receiver front-end , 2006, IEEE Journal of Solid-State Circuits.

[11]  Gabriel M. Rebeiz,et al.  0.13-$\mu$m CMOS Phase Shifters for X-, Ku-, and K-Band Phased Arrays , 2007, IEEE Journal of Solid-State Circuits.