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5.7 GHz low-power variable-gain LNA in 0.18 μm CMOS

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2 Author(s)
Y. S. Wang ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; L. -H. Lu

A variable-gain low-noise amplifier (LNA) suitable for low-voltage and low-power operation is designed and implemented in a standard 0.18 μm CMOS technology. With a current-reused topology, the common-source gain stages are stacked for minimum power dissipation while achieving high small-signal gain. The fully integrated 5.7 GHz LNA exhibits 16.4 dB gain, 3.5 dB noise figure and 8 dB gain tuning range with good input and output return losses. The LNA consumes 3.2 mW DC power from a supply voltage of 1 V. A gain/power quotient of 5.12 dB/mW is achieved in this work.

Published in:

Electronics Letters  (Volume:41 ,  Issue: 2 )