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Detection of CD40 Protein-Umbelliferone Interaction via Differential Scanning Fluorescence

Detection of CD40 Protein-Umbelliferone Interaction via Differential Scanning Fluorescence

Published on: March 1, 2024

Versatile digital lock-in detection technique: application to spectrofluorometry and other fields.

S Cova¹, A Longoni, I Freitas

¹Centro di Studio per l'Elettronica Quantistica e la Strumentazione Elettronica del C.N.R., Istituto di Fisica del Politecnico, Milano, Italy.

The Review of Scientific Instruments

|March 1, 1979

Summary

A new digital lock-in detection technique improves upon analog methods using multichannel pulse analyzers. This digital approach offers enhanced performance for optical spectrometry and semiconductor C-V profiling applications.

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Area of Science:

Electronics and Instrumentation
Signal Processing

Background:

Analog lock-in amplifiers have practical limitations in sensitivity and dynamic range.
Accurate signal detection is crucial in fields like optical spectrometry and semiconductor characterization.

Purpose of the Study:

To introduce a digital lock-in detection technique overcoming analog limitations.
To demonstrate the implementation and application of this digital technique.

Main Methods:

Development of a digital lock-in detection system.
Implementation using multichannel pulse analyzers.
Testing in optical spectrometry and semiconductor capacitance-voltage (C-V) profiling.

Main Results:

The digital lock-in technique successfully addressed limitations of analog counterparts.
Representative results were obtained for optical spectrometry.
Effective semiconductor profiling using C-V techniques was achieved.

Conclusions:

The digital lock-in detection technique offers a viable alternative to analog systems.
The method demonstrates versatility across different scientific and engineering applications.
Further adaptation to various modulation waveforms is possible.