Work

Note: Differential configurations for the mitigation of slow fluctuations limiting the resolution of digital lock-in amplifiers

Year: 2016

Type: article

Abstract: The resolution of digital lock-in amplifiers working with a narrow bandwidth (<100 Hz) is limited by slow fluctuations, which can be two orders of magnitude larger (μV range) than the noise of the input amplifier (tens of nV). In order to tackle this issue, affecting state-of-the-art laboratory instrumentation and here systematically quantified, three differential sensing configurations are presented. They adapt to different setup conditions and are based on manual and automatic tuning of dummy references, allowing a 25-fold resolution improvement for enhanced long-term tracking of impedance sensors.

Source: Review of Scientific Instruments

DOI: 10.1063/1.4941721

Authors: M. Carminati, G. Gervasoni, M. Sampietro, G. Ferrari

Institution: Politecnico di Milano

Language: English

Topic: Advanced Electrical Measurement Techniques

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funder: Fondazione Cariplo

Awards: Early Stage Cancer diagnosis via HIghly sensitive Lab-On-chip multitarget systems - ESCHILO, DRINKing wAter resilient management comBining process anaLyses, CFD and innovative sEnsor monitoring - DRINK-ABLE