A 6.2 mW 0.024 mm2 fully-passive RF downconverter with 12 dB gain enhancement using MOS parametric amplification

J. R. Custódio, I. Bastos, L. B. Oliveira, J. P. Oliveira, P. Pereira, J. Goes, Erik Bruun

Research output: Contribution to journalJournal articleResearchpeer-review


This paper describes a fully-passive discrete-time switched-capacitor RF downconverter with an on-chip oscillator, that combines quadrature mixing and harmonic rejection, designed in a 130 nm digital CMOS technology. By using MOS capacitors (varactors) to perform parametric amplification, it is possible to achieve a measured gain enhancement of about 12 dB, together with 21 dB noise figure and more than 5 dBm IIP3. Operating in the VHF-III band, the downconverter core dissipates 6.2 mW and occupies 0.024 mm2.
Original languageEnglish
JournalAnalog Integrated Circuits and Signal Processing
Issue number2
Pages (from-to)299-304
Publication statusPublished - 2013


  • Downconversion
  • Mixer
  • Parametric amplication

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