A simple current-to-voltage interface for dielectric relaxation measurements in the range 10-3 to 107 Hz

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

A new circuit is presented for detecting low-level harmonic currents as needed in dielectric relaxation spectroscopy in the low- to medium-frequency range. For a standard operational amplifier-based current-to-voltage converter, a special feedback network is designed such that the output voltage is fairly insensitive to frequency over many decades if a sine generator is coupled to the input via a capacitor with a lossy dielectric. In combination with a gain-phase analyzer or lock-in amplifier this system measures ε*(ω) in the frequency range 10-3 to 107 Hz with high resolution needed for conclusive dielectric relaxation spectroscopy.

Original languageEnglish (US)
Pages (from-to)3217-3221
Number of pages5
JournalReview of Scientific Instruments
Volume67
Issue number9
DOIs
StatePublished - Sep 1996
Externally publishedYes

ASJC Scopus subject areas

  • Instrumentation

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