Abstract
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 language | English |
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Pages (from-to) | 74-77 |
Number of pages | 4 |
Journal | Procedia Engineering |
Volume | 5 |
DOIs | |
Publication status | Published - 1 Jan 2010 |
Funding
This work was supported in part by MICINN (RYC-2008-03185, PET2007-00336, PET2008-0021 and TEC2009-09175), DGA-La Caixa (GA-LC-039/2008, GA-LC-033/2009), DGA (PI 113/09) and the I3A Fellowship Program.
Keywords
- Condictioning electronics
- Lock-in amplifier
- Phase-shift detector
- Sensor signal conditioning
ASJC Scopus subject areas
- General Engineering