In Electrical Impedance Tomography (EIT) measurement sinusoidal currents are applied on a surface of the human body and voltage response is measured in order to reconstruct conductivity distribution in a body cross-section. We have constructed an experimental system for EIT measurement based on voltage response to short current pulses. In this case resistive components of body impedance are mea...

This paper presents a new method for estimating the capacity of a lithium ion battery cell in the presence of a reference cell the parameters of which are well characterized in series with it. The method assumes that both cells are cycled using the same current trajectory starting from the same state of charge (e.g. fully charged). Voltage measurements for both cells as well as current measurem...

This paper formulates a simple matrix-based solution to estimate the voltage-dependent capacitance of a weakly nonlinear device at microwave and millimeter wave frequencies. Unlike other approaches, which rely on the direct capacitance measurement at different bias voltages, the proposed technique generates a large signal model for the capacitance directly from the frequency domain measurement ...

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This study treats the optimised one-port (reflection coefficient) and two-port (shunt-through/series-through) measurement methods for complex permeability determination of solid soft magnetic materials using a vector network analyzer (VNA) at frequencies from 9 kHz to 6.5 GHz. The principle of measurement methods, the relationships of measured phasor voltage ratio (Sparameter) to complex impeda...

Voltage variation is one of lamps flickering main cause; thus evaluation of a disturbing light flicker is a part of voltage quality classification. The instrument for flicker level measurement by means of voltage variation analysis is named flickermeter and is specified in standard EN 610004-15. The flickermeter is a specialized analyzer modeling response of a chain consisting of reference 60W ...

Voltage sensors are an important part of the electric system. In service, traditional voltage sensors need to directly contact a high-voltage charged body. Sensors involve a large volume, complex insulation structures, and high design costs. Typically an iron core structure is adopted. As a result, ferromagnetic resonance can occur easily during practical application. Moreover, owing to the mul...

It has been reported that breakdown voltage is affected by several factors, such as moisture, particles, acidity, and pressure [3,4,5,6]. The objective of this study is to investigate the dependency of the breakdown voltage on moisture using a representative set of oil samples and to point out the advantages of online moisture measurement. The Effect of Moisture on the Breakdown Voltage of Tran...

An all-digital on-chip delay measurement (OCDM) architecture with high delay measurement resolution and low supply voltage sensitivity for efficiently detection and diagnosis in the high performance system-on-chip (SoC) applications is presented. Based on the proposed differential delay line pair (DDLP) and an cascadestage delay line, the quantization resolution of the proposed OCDM not only ha...

A bandgap reference circuit that uses high-voltage drainextended MOS (DeMOS) devices is presented for high supply voltage application without using a voltage regulator for the bandgap core circuit. The bandgap reference circuit was fabricated using commercially available 0.18μm high-voltage DeMOS technology. Measurement result of the chip shows that the reference voltage change rate for VDD var...