The Intermodulation Lockin Analyzer

Details The Intermodulation Lockin Analyzer The Intermodulation Lockin Analyzer

2010-08-16

arxiv.org/abs/1008.2722v1

Physics

Instrumentation and Detectors

Scientific paper

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 lock-in 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.

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