A Connection Between Anomalous Poisson–Nernst–Planck Model and Equivalent Circuits with Constant Phase Elements

2013 ◽  
Vol 117 (45) ◽  
pp. 23685-23690 ◽  
Author(s):  
E. K. Lenzi ◽  
J. L. de Paula ◽  
F. R. G. B. Silva ◽  
L. R. Evangelista
Keyword(s):  
Equivalent Circuits ◽  
Constant Phase Elements

scholarly journals The origin of constant phase element in equivalent circuit of MIS (n) GaAs structures

2020 ◽  
Vol 31 (21) ◽  
pp. 19106-19118
Author(s):  
Łukasz Drewniak ◽  
Stanisław Kochowski
Keyword(s):  
Impedance Spectroscopy ◽  
Constant Phase Element ◽  
Deep Level ◽  
Frequency Dispersion ◽  
Interface States ◽  
Equivalent Circuits ◽  
Electrical Characteristics ◽  
In Series ◽  
Constant Phase Elements ◽  
Large Frequency

AbstractThe Au/Pd/Ti–SiO2-(n) GaAs properties have been analyzed via impedance spectroscopy (IS), as well as DLTS and ICTS, to identify the origin of electron processes responsible for existence of constant phase elements (CPE) in an equivalent circuits of that structure. We showed that CPEs connected in series with resistance represents the electron processes associated with deep levels in GaAs and/or interface states at SiO2-(n) GaAs interface, depending on the value of n of CPE parameter. CPE with n close to 1 characterize the electron processes associated with EL2 deep level, and CPE with n = 0.5–0.65 the complex electron processes associated with EL3 deep level and interface states together. We stated that constant phase elements in equivalent circuits of MIS-GaAs structures with large frequency dispersion of electrical characteristics can be the result of more than one electron process.

Application of Composite Distributed Electrodes in Cardiographic Sensors

2021 ◽  
Vol 13 ◽  
Author(s):  
Nikolai F. Uvarov ◽  
Boris B. Bokhonov ◽  
Artem S. Ulihin ◽  
Alexander I. Titkov ◽  
Yuriy M. Yukhin ◽  
...  
Keyword(s):  
Wide Frequency Range ◽  
Equivalent Model ◽  
Equivalent Circuits ◽  
Electrode Impedance ◽  
Shape Distortion ◽  
Distributed Parameters ◽  
Real Change ◽  
Electrode Interface ◽  
Double Time ◽  
Constant Phase Elements

Background: An analysis of equivalent circuits used to interpret the impedance of bio-electrode for electrocardiography shows that the best description is achieved using a double-time constant model of the skin-electrode interface. However, for the measurements it is necessary to use equipment with high input impedance, which leads to the loss of information about the real change in the bio-potential. Objective: The aim of the study is to comprehensively investigate and select the equivalent model that are used to interpret the impedance of a composite bioelectrode with distributed parameters. Method: We used theoretical and experimental research methods. Results: It is proposed for measuring bio-potential to use Ag/AgI/Al2O3 electrodes with distributed parameters. Such electrodes are characterized by a higher contact area and their impedance is described in terms of equivalent circuits with constant phase elements (CPE). It was shown that the electrode impedance is well described over a wide frequency range by an equivalent circuit typical for distributed electrodes including two CPE elements. Conclusion: It is experimentally shown that the distributed Ag/AgI/Al2O3 electrode has at least 6 times smaller polarization contribution than a commercial Ag/AgCl cardiographic electrode. It may enable more accurate measurements of bio-potentials providing less pulse shape distortion caused by polarization of electrochemical biosensors.

Wavelength Analysis Using Equivalent Circuits in a Fast and Slow Wave Waffle-Iron Ridge Guide

2017 ◽  
Vol E100.B (2) ◽  
pp. 219-226 ◽  
Author(s):  
Hideki KIRINO ◽  
Kazuhiro HONDA ◽  
Kun LI ◽  
Koichi OGAWA
Keyword(s):  
Slow Wave ◽  
Equivalent Circuits ◽  
Ridge Guide

Equivalent Circuits of the 27.5 kV Electric Railway External Power Supply System

2020 ◽  
Vol 8 (8) ◽  
pp. 29-36
Author(s):  
Yeugene P. FIGURNOV ◽  
◽  
Yury I. ZHARKOV ◽  
Nataliya A. POPOVA ◽  
◽  
...  
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Equivalent Circuits ◽  
External Power ◽  
Electric Railway ◽  
External Power Supply

High-frequency equivalent circuits of junction-gate field-effect transistors

1970 ◽  
Vol 6 (18) ◽  
pp. 590
Author(s):  
P.U. Calzolari ◽  
S. Graffi ◽  
A. Mazzone
Keyword(s):  
High Frequency ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Equivalent Circuits

Impedance Analysis of Layer Structured NBT–CBT Mixed Ceramics

1998 ◽  
Vol 12 (11) ◽  
pp. 433-441 ◽  
Author(s):  
P. S. Rama Sastry ◽  
T. Bhimasankaram ◽  
G. S. Kumar ◽  
G. Prasad
Keyword(s):  
Comparative Study ◽  
Complex Impedance ◽  
Impedance Analysis ◽  
Equivalent Circuits ◽  
Impedance Spectra ◽  
Ceramic System ◽  
Different Temperatures ◽  
Mixed Ceramics ◽  
Mixed Ceramic ◽  
Complex Impedance Spectra

Complex impedance spectra of ferroelectric mixed ceramic system ( Na 0.5 Bi 0.5)1-x Ca x Bi 4 Ti 4 O 15 with x=0, 0.1, 0.3, 0.5, 0.7 and 1 was studied as a function of frequency and temperature in the range 1 KHz to 10 MHz and 30°C to 620°C respectively. Equivalent circuits involving resistive and capacitive elements at different temperatures, activation energies of relaxations and conduction were evaluated using impedance plots. A comparative study of impedance and conductivity facilities an insight in understanding the electrical nature of these electroceramics.

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