Title :
Implementation of a high-frequency digital lock-in amplifier
Author :
Sonnaillon, Maximiliano O. ; Urteaga, Raúl ; Bonetto, Fabián José ; Ordoñez, Martín
Author_Institution :
Cavitation & Biotechnol. Lab., Inst. Balseiro, San Carlos de Bariloche
Abstract :
A high-frequency digital lock-in amplifier that uses non-uniform sampling is proposed and validated experimentally. By using a random sampling strategy, it is possible to process periodic signals of frequencies several times greater than the Nyquist frequency, which is given by the sampling theorem. The implemented instrument, based on a digital signal processor and its associated hardware, is described in this paper. Experimental results show the advantages of the proposed lock-in
Keywords :
HF amplifiers; digital signal processing chips; filtering theory; random processes; signal sampling; Nyquist frequency; digital signal processor; high-frequency digital lock-in amplifier; nonuniform sampling; sampling theorem; Amplifiers; Digital signal processing; Digital signal processors; Frequency conversion; Instruments; Phase locked loops; Sampling methods; Signal generators; Signal processing; Signal sampling;
Conference_Titel :
Electrical and Computer Engineering, 2005. Canadian Conference on
Conference_Location :
Saskatoon, Sask.
Print_ISBN :
0-7803-8885-2
DOI :
10.1109/CCECE.2005.1557199
