A complete low voltage analog lock-in amplifier to recover sensor signals buried in noise for embedded applications

M. Gabal, N. Medrano, B. Calvo, P. A. Martínez, S. Celma, M. R. Valero

Research output: Contribution to journalArticle

15 Citations (Scopus)


This paper presents a low-voltage 3V single supply analog lock-in amplifier (LIA) for processing small AC sensor signals buried in noise, including those presenting a relative phase with respect to the reference signal. Reference and bias sensor signals are provided by a quadrature oscillator. Experimental results confirm the capability of the proposed lock-in amplifier to effectively recover information from signal to noise ratios below 0.025, with an error below 9%.

Original languageEnglish
Pages (from-to)74-77
Number of pages4
JournalProcedia Engineering
Publication statusPublished - 1 Jan 2010



  • Condictioning electronics
  • Lock-in amplifier
  • Phase-shift detector
  • Sensor signal conditioning

ASJC Scopus subject areas

  • Engineering(all)

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