Reconfigurable low-noise amplifier operating as either differential or single-ended

Ming Ching Kuo*, Chien-Nan Kuo, Yi Shing Shih

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A single-stage noise-canceling LNA with differential output, but selectively single-ended or differential input is proposed. The LNA can flexibly operate as either differential or single-ended by adjusting external components without any change inside the chip. Moreover, it achieves good performance in noise figure, gain, input matching and differential balance, irrespective of the differential or single-ended configuration. The LNA is designed and implemented in a 0.13nm CMOS technology for sub 1-GHz applications. It provides 22.5dB voltage gain, +1dBm IIP3, and 2.5dB NF in the differential configuration, while achieving 23dB voltage gain, -0.5dBm IIP3, and 2.65dB NF in the single-ended mode. The LNA core circuit draws 2.5mA from a 1,2V supply voltage, and occupies a small chip area of 0.06mm2.

Original languageEnglish
Pages (from-to)145-154
Number of pages10
JournalInternational Journal of Electrical Engineering
Issue number2
StatePublished - 1 Apr 2010


  • Balun
  • Common-mode rejecting(CMR)
  • Noise-canceling
  • Reconfigurable LNA
  • Wideband

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