کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
730580 892985 2008 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An analysis of a measurement probe for a high impedance spectroscopy analyzer
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
پیش نمایش صفحه اول مقاله
An analysis of a measurement probe for a high impedance spectroscopy analyzer
چکیده انگلیسی

The paper presents a measurement probe which forms the input circuitry of an analyzer for high impedance spectroscopy. The probe allows measurements of impedance which is grounded at one terminal in the range of 100 Ω < ∣Zm∣ ⩽ 100 GΩ. It extracts two signals proportional to current through and voltage across the measured impedance in a wide frequency range from 100 μHz up to 100 kHz. An analysis of the probe has been performed taking into account the most important parameters affecting the accuracy of the impedance measurement: parasitic capacitance at the probe input, the parameters of the transfer function of the amplifier and the tolerance of the resistors in the differential amplifier of the current signal. The formula for determining the measured impedance was elaborated, taking into consideration corrections minimizing the influence of the parasitic capacitance and the real-life parameters of the operational amplifiers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Measurement - Volume 41, Issue 1, January 2008, Pages 65–75
نویسندگان
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