P. Kumbhare, N. Sarwade, A. K. Sharma, Tushar Jankar
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Simulation of lock in amplifier (LIA) for very low signal measurements
In this paper we present the simulation of a Lock-in amplifier completely based on LabVIEW. The software processes the signal analysis of the submerged intelligent signal in noise. We describe some characteristics of the Lock in amplifier including output voltage vs. phase and output phase vs. noise. Lock in Amplifier is used to measure the very small signals, even in the presence of broadband noise, which is several times greater than the signal itself. Since the signal processing takes place on the computer, the output is display in the form of waveform. Tab Based system will allow easy access of LAB VIEW Software.
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