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A Resistively Degenerated Wideband Passive Mixer With Low Noise Figure and High {\rm IIP}_{2}

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3 Author(s)
Namsoo Kim ; Dept. of Electr. & Comput. Eng., Univ. of California at San Diego, San Diego, CA, USA ; Aparin, V. ; Larson, L.E.

A CMOS mixer whose linearity is maintained for a wide frequency range is presented. Transconductance (Gm) boosting methods, such as input cross-coupling, current reuse complementary input, and back gate connection, are used to improve overall gain and noise performance. A source-degenerated passive mixer is used to improve noise figure (NF) by increasing the equivalent mixer output impedance. The operating frequency is from 1.55 to 2.3 GHz. The measured performance shows less than 9.5 dB double-sideband (DSB) NF, more than 22-dB voltage gain, better than +50 dBm uncalibrated IIP2, and higher than +7 dBm of IIP3, while consuming only 10 mW from a 2-V supply. A 0.18-??m Si CMOS process with metal-insulator-metal capacitors is used.

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:58 ,  Issue: 4 )

Date of Publication:

April 2010

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