A wideband transconductance enhancement CMOS LNA with multiple feedback technique

Jian Shou Chen, Chih Wen Lu, Ping Yeh Yin, Chin Hsia, Jenny Yi-Chun Liu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

This work proposes a wideband transconductance enhancement CMOS LNA with multiple feedback technique. Two positive-feedback loops are used to alleviate the restricted gm value for input matching of the CG LNA. By using a triple-well process, the bulk cross-coupling connection between the common-gate amplifiers enhances the transconductance (gm) of the input stage, thus saving power consumption and reducing NF. A negative-feedback loop is also used to boost gm, lowering the input impedance and raising the voltage gain. An amplifier prototype was realized in 90-nm CMOS technology, operating from 10 to 1010 MHz, and dissipating 5.68 mW from 2-V supply while occupying a 0.048-mm2 core area. The LNA delivers a maximum power gain of 11.5 dB, a minimum NF of 2.14 dB, and a third-order intermodulation intercept point of -0.85 dBm.

Original languageEnglish
Title of host publication2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems, COMCAS 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479974733
DOIs
StatePublished - 17 12 2015
Externally publishedYes
EventIEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems, COMCAS 2015 - Tel-Aviv, Israel
Duration: 02 11 201504 11 2015

Publication series

Name2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems, COMCAS 2015

Conference

ConferenceIEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems, COMCAS 2015
Country/TerritoryIsrael
CityTel-Aviv
Period02/11/1504/11/15

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

Keywords

  • CMOS
  • common gate (CG)
  • feedback
  • low-noise amplifier (LNA)
  • wideband

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