Sensors (Jul 2022)

Miniature Wide-Band Noise-Canceling CMOS LNA

  • David Galante-Sempere,
  • Javier del Pino,
  • Sunil Lalchand Khemchandani,
  • Hugo García-Vázquez

DOI
https://doi.org/10.3390/s22145246
Journal volume & issue
Vol. 22, no. 14
p. 5246

Abstract

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In this paper, a wide-band noise-canceling (NC) current conveyor (CC)-based CMOS low-noise amplifier (LNA) is presented. The circuit employs a CC-based approach to obtain wide-band input matching without the need for bulky inductances, allowing broadband performance with a very small area used. The NC technique is applied by subtracting the input transistor’s noise contribution to the output and achieves a noise figure (NF) reduction from 4.8 dB to 3.2 dB. The NC LNA is implemented in a UMC 65-nm CMOS process and occupies an area of only 160 × 80 μm2. It achieves a stable frequency response from 0 to 6.2 GHz, a maximum gain of 15.3 dB, an input return loss (S11) IIP3 of 7.6 dBm, while consuming 18.6 mW from a ±1.2 V DC supply. Comparisons with similar works prove the effectiveness of this new implementation, showing that the circuit obtains a noteworthy performance trade-off.

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