Dual-Phase Lock-In Amplifier Based on FPGA for Low-Frequencies Experiments

作     者：Macias-Bobadilla, Gonzalo Rodriguez-Resendiz, Juvenal Mota-Valtierra, Georgina Soto-Zarazua, Genaro Mendez-Loyola, Maurino Garduno-Aparicio, Mariano 

作者机构：Univ Autonoma Queretaro Laboratorio Mecatron Cerro Ias Campanas Col Campanas Queretaro 76010 Mexico Univ Autonoma Queretaro Lab Mecatron Col Campanas S-N Queretaro 76010 Mexico 

出 版 物：《SENSORS》 (传感器)

年 卷 期：2016年第16卷第3期

页      面：379-379页

核心收录：

学科分类：0710[理学-生物学] 071010[理学-生物化学与分子生物学] 0808[工学-电气工程] 07[理学] 0804[工学-仪器科学与技术] 0703[理学-化学] 

基　　金：Mexican national council of science and technology (CONACYT) National Center of Metrology (CENAM-Mexico) Physics and Advanced Technology at the Mexican National Autonomous University (CFATA-UNAM) 

主　　题：Phase-Shift-Detection Lock-In-Amplifier Field-Programmable-Gate-Array frequency-stability 

摘      要：Photothermal techniques allow the detection of characteristics of material without invading it. Researchers have developed hardware for some specific Phase and Amplitude detection (Lock-In Function) applications, eliminating space and unnecessary electronic functions, among others. This work shows the development of a Digital Lock-In Amplifier based on a Field Programmable Gate Array (FPGA) for low-frequency applications. This system allows selecting and generating the appropriated frequency depending on the kind of experiment or material studied. The results show good frequency stability in the order of 1.0 x 10(-9) Hz, which is considered good linearity and repeatability response for the most common Laboratory Amplitude and Phase Shift detection devices, with a low error and standard deviation.