Linearity improvement of cascode low-noise amplifiers using double DS method with a tuned inductor

Chi Wan Park, Youngbin Ahn, Jaehoon Lee, Jichai Jeong

Research output: Contribution to journalArticlepeer-review

Abstract

We propose a highly linear low-noise amplifier (LNA) using the double derivative superposition method with a tuned inductor. This topology has an auxiliary common gate stage of the cascode amplifier to cancel each third-order intermodulation distortion (IMD3) component and can provide a high third-order input intercept point (IIP3) for the 5.25GHz frequency band. From the simulation results using the TSMC 0.18 μm RF CMOS process, the IIP3 in the proposed cascode LNAs can be improved by 9dB, compared with the conventional derivative superposition method. The proposed LNA achieves an IIP3 of + 15 dBm with a gain of 10.5 dB, a noise figure of 2.4 dB, and a power consumption of 6mA at 1.5 V.

Original languageEnglish
Pages (from-to)847-855
Number of pages9
JournalInternational Journal of Electronics
Volume97
Issue number7
DOIs
Publication statusPublished - 2010 Jul

Keywords

  • derivative superposition
  • low-noise amplifier
  • third order input intercept point

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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