注意：互调锁定分析仪。

Note: The intermodulation lockin analyzer.

作者信息

Tholén Erik A, Platz Daniel, Forchheimer Daniel, Schuler Vivien, Tholén Mats O, Hutter Carsten, Haviland David B

机构信息

Intermodulation Products AB, Stockholm, Sweden.

出版信息

Rev Sci Instrum. 2011 Feb;82(2):026109. doi: 10.1063/1.3541791.

DOI:10.1063/1.3541791

PMID:21361648

Abstract

Nonlinear systems can be probed by driving them with two or more pure tones while measuring the intermodulation products of the drive tones in the response. We describe a digital lockin analyzer which is designed explicitly for this purpose. The analyzer is implemented on a field-programmable gate array, providing speed in analysis, real-time feedback, and stability in operation. The use of the analyzer is demonstrated for intermodulation atomic force microscopy. A generalization of the intermodulation spectral technique to arbitrary drive waveforms is discussed.

摘要

可以通过用两个或更多纯音驱动非线性系统，同时测量响应中驱动音的互调产物来对其进行探测。我们描述了一种专门为此目的设计的数字锁相放大器。该放大器在现场可编程门阵列上实现，具有分析速度快、实时反馈和操作稳定的特点。演示了该放大器在互调原子力显微镜中的应用。讨论了互调光谱技术对任意驱动波形的推广。