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Proceedings of 2009 International Workshop on Information Security and Application (IWISA 2009)

Qingdao, China, November 21-22, 2009

Editors: Feng Gao and Xijun Zhu

AP Catalog Number: AP-PROC-CS-09CN004

ISBN: 978-952-5726-06-0

Page(s): 532-537

Design and Simulation of a Lock-in Amplifier Based on Simplorer

Qing Yang

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Lock-in amplifiers are of great practical values in that they can extract weak signals from extremely noisy environment However, traditional lock-in amplifiers fail in making the phase of reference signals track the phase of input signals automatically, a Simplorer-based lock-in amplifier, therefore, was designed and simulated to tackle this problem. This lock-in amplifier enabled the two phases keep consistent with each other and thus achieved the function of cross-correlation detection. Consequently, it showed better performance in lessening noises and enhanced the function of extracting weak signals from intense noises, and by processing these signals, the desirable signal could be obtained.

Index Terms

Simplorer, lock-in amplifier, design, simulation

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