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Related Experiment Video

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Fabrication Procedures and Birefringence Measurements for Designing Magnetically Responsive Lanthanide Ion Chelating Phospholipid Assemblies

Fabrication Procedures and Birefringence Measurements for Designing Magnetically Responsive Lanthanide Ion Chelating Phospholipid Assemblies

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Note: The intermodulation lockin analyzer.

Erik A Tholén¹, Daniel Platz, Daniel Forchheimer

¹Intermodulation Products AB, Stockholm, Sweden.

The Review of Scientific Instruments

|March 3, 2011

Summary

This summary is machine-generated.

We developed a digital lockin analyzer for probing nonlinear systems using multiple frequencies. This tool enhances intermodulation atomic force microscopy and can analyze arbitrary drive waveforms for advanced nonlinear system characterization.

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Area of Science:

Nonlinear Dynamics
Instrumentation
Atomic Force Microscopy

Background:

Nonlinear systems analysis often involves driving with multiple frequencies and measuring intermodulation products.
Existing methods may lack the speed, real-time feedback, or stability required for complex measurements.

Purpose of the Study:

To introduce a novel digital lockin analyzer specifically designed for intermodulation spectroscopy.
To demonstrate its application in intermodulation atomic force microscopy.
To generalize the technique for arbitrary drive waveforms.

Main Methods:

Implementation of a digital lockin analyzer on a field-programmable gate array (FPGA).
Utilizing multi-tone excitation to probe nonlinear system responses.
Measuring intermodulation products in the system's response.

Main Results:

The FPGA-based analyzer provides high-speed analysis and stable real-time operation.
Successful demonstration of the analyzer in intermodulation atomic force microscopy.
The intermodulation spectral technique is generalized to accommodate arbitrary drive waveforms.

Conclusions:

The developed digital lockin analyzer offers a powerful and versatile tool for nonlinear system characterization.
Its real-time capabilities and stability significantly advance techniques like intermodulation atomic force microscopy.
The generalization broadens the applicability of intermodulation spectral analysis to complex driving signals.