scholarly journals The analysis of full-wave wide-band precision rectifier with modified second type current conveyor

2007 ◽  
Vol 20 (2) ◽  
pp. 215-221 ◽  
Author(s):  
Slobodan Ðukic
Keyword(s):  
Operational Amplifier ◽  
Wide Band ◽  
Current Conveyor ◽  
Current Sensing ◽  
Full Wave ◽  
Current Mirrors ◽  
Wide Range ◽  
Supply Current

The full-wave wide-band precision rectifier with modified second type current conveyor (MCCII), realized with the operational amplifier and three current mirrors (CM), is presented in this paper. The model of operational amplifier is adapted in such a way that it is possible to use supply-current sensing in supply rails of operational amplifier with SPICE program. Wilson's realization for current mirrors is used for precise current reproduction in a wide range of the amplitude values as well as frequencies.

A full-wave rectifier using a current conveyor and current mirrors

2001 ◽  
Vol 88 (7) ◽  
pp. 751-758 ◽  
Author(s):  
Adisak Monpapassorn ◽  
Kobchai Dejhan ◽  
Fusak Cheevasuvit
Keyword(s):  
Current Conveyor ◽  
Full Wave ◽  
Current Mirrors ◽  
A Current

scholarly journals Temperature independent current conveyor precision full-wave rectifier for low-level signal

2009 ◽  
Vol 22 (1) ◽  
pp. 117-123
Author(s):  
Slobodan Djukic
Keyword(s):  
Input Signal ◽  
Transfer Characteristic ◽  
Current Conveyor ◽  
Current Steering ◽  
Output Stage ◽  
Zero Crossing ◽  
Low Level ◽  
Class A ◽  
Full Wave ◽  
Current Mirrors

A circuit that provides precision rectification low-level input signal with low temperature sensitivity is presented in this paper. It utilizes an improved second type current conveyor based around current-steering output stage and voltage biased silicon diodes, rather than more usual current mirrors. Proposed design of the precision rectifier ensures good current transfer linearity in the range that satisfy class A of the amplifier and good voltage transfer characteristic for low level signals. Distortion during the zero crossing of the input signal is practically eliminated. Design of the proposed rectifier is realized with usual components that can be bought in the market. .

scholarly journals SPICE macromodel for operational amplifier power supply current sensing

1994 ◽  
Vol 30 (23) ◽  
pp. 1911-1912 ◽  
Author(s):  
M.E. Brinson ◽  
D.J. Faulkner
Keyword(s):  
Power Supply ◽  
Operational Amplifier ◽  
Current Sensing ◽  
Supply Current

scholarly journals Analysis of Dual-Band Direction of Arrival Estimation in Multipath Scenarios

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1236
Author(s):  
Alessandro Cidronali ◽  
Edoardo Ciervo ◽  
Giovanni Collodi ◽  
Stefano Maddio ◽  
Marco Passafiume ◽  
...  
Keyword(s):  
Multiple Access ◽  
Direction Of Arrival ◽  
Doa Estimation ◽  
Dual Band ◽  
Second Step ◽  
Frequency Division ◽  
Simulation Environment ◽  
Full Wave ◽  
Wide Range ◽  
Localization Systems

The present paper analyzes the performance of localization systems, based on dual-band Direction of Arrival (DoA) approach, in multi-path affected scenarios. The implemented DoA estimation, which belongs to the so-called Space and Frequency Division Multiple Access (SFDMA) technique, takes advantage of the use of two uncorrelated communication carrier frequencies, as already demonstrated by the authors. Starting from these results, this paper provides, first, the methodology followed to describe the localization system in the proposed simulation environment, and, as a second step, describes how multi-path effects may be taken into account through a set of full-wave simulations. The latter follows an approach based on the two-ray model. The validation of the proposed approach is demonstrated by simulations over a wide range of virtual scenarios. The analysis of the results highlights the ability of the proposed approach to describe multi-path effects and confirms enhancements in DoA estimation as experimentally evaluated by the same authors. To further assess the performance of the aforementioned simulation environment, a comparison between simulated and measured results was carried out, confirming the capability to predict DoA performance.

scholarly journals Hybrid ZnO/MoS2 Core/Sheath Heterostructures for Photoelectrochemical Water Splitting

Applied Nano ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 148-161
Author(s):  
Katerina Govatsi ◽  
Aspasia Antonelou ◽  
Labrini Sygellou ◽  
Stylianos G. Neophytides ◽  
Spyros N. Yannopoulos
Keyword(s):  
Visible Light ◽  
Wide Band ◽  
Nanowire Arrays ◽  
Maximum Efficiency ◽  
Light Illumination ◽  
Wide Band Gap ◽  
Long Term Stability ◽  
Visible Light Illumination ◽  
Nanowire Surface ◽  
Wide Range

The rational synthesis of semiconducting materials with enhanced photoelectrocatalytic efficiency under visible light illumination is a long-standing issue. ZnO has been systematically explored in this field, as it offers the feasibility to grow a wide range of nanocrystal morphology; however, its wide band gap precludes visible light absorption. We report on a novel method for the controlled growth of semiconductor heterostructures and, in particular, core/sheath ZnO/MoS2 nanowire arrays and the evaluation of their photoelectrochemical efficiency in oxygen evolution reaction. ZnO nanowire arrays, with a narrow distribution of nanowire diameters, were grown on FTO substrates by chemical bath deposition. Layers of Mo metal at various thicknesses were sputtered on the nanowire surface, and the Mo layers were sulfurized at low temperature, providing in a controlled way few layers of MoS2, in the range from one to three monolayers. The heterostructures were characterized by electron microscopy (SEM, TEM) and spectroscopy (XPS, Raman, PL). The photoelectrochemical properties of the heterostructures were found to depend on the thickness of the pre-deposited Mo film, exhibiting maximum efficiency for moderate values of Mo film thickness. Long-term stability, in relation to similar heterostructures in the literature, has been observed.

scholarly journals The effect of subionospheric propagation on whistlers recorded by the DEMETER satellite – observation and modelling

2007 ◽  
Vol 25 (5) ◽  
pp. 1103-1112 ◽  
Author(s):  
O. E. Ferencz ◽  
Cs. Ferencz ◽  
P. Steinbach ◽  
J. Lichtenberger ◽  
D. Hamar ◽  
...  
Keyword(s):  
Ionospheric Plasma ◽  
Lightning Discharge ◽  
Wide Band ◽  
Satellite Observation ◽  
Guided Wave ◽  
Propagation Characteristics ◽  
Wave Modelling ◽  
Full Wave ◽  
Demeter Satellite ◽  
Guided Wave Propagation

Abstract. During a routine analysis of whistlers on the wide-band VLF recording of the DEMETER satellite, a specific signal structure of numerous fractional-hop whistlers, termed the "Spiky Whistler" (SpW) was identified. These signals appear to be composed of a conventional whistler combined by the compound mode-patterns of guided wave propagation, suggesting a whistler excited by a lightning "tweek" spheric. Rigorous, full-wave modelling of tweeks, formed by the long subionospheric guided spheric propagation and of the impulse propagation across an arbitrarily inhomogeneous ionosphere, gave an accurate description of the SpW signals. The electromagnetic impulses excited by vertical, preferably CG lightning discharge, exhibited the effects of guided behaviour and of the dispersive ionospheric plasma along their paths. This modelling and interpretation provides a consistent way to determine the generation and propagation characteristics of the recorded SpW signals, as well as to describe the traversed medium.

CMIA Based on Op-Amp Power Supply Current Sensing Technique

2018 ◽  
pp. 15-28
Author(s):  
Leila Safari ◽  
Giuseppe Ferri ◽  
Shahram Minaei ◽  
Vincenzo Stornelli
Keyword(s):  
Power Supply ◽  
Current Sensing ◽  
Op Amp ◽  
Supply Current
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