... novel multiple information encryption by user-image-based gyrator transform hologram is proposed. In encryption process, each ... encoded, modulated by random phase function and then gyrator transformed to get the gyrator spectrum of user image. Subsequently, each channel of ... encoded, multiplied by modulated user image, and then gyrator transformed to obtain the gyrator spectrum of secret image. The encrypted digital hologram is recorded by the interference between the gyrator spectrum of user image and the spherical wave ...
Tópico(s): Advanced Optical Imaging Technologies
2017 - Elsevier BV | Optics and Lasers in Engineering
Ramy A. Saad, Ahmed M. Soliman,
Abstract In this paper, CCII‐based gyrators are synthesized, modeled, and analyzed using the generalized symbolic framework for linear active circuits. The systematic synthesis method using admittance matrix expansion, ... to generate optimized nullor–mirror descriptions for the gyrator. The resulting CCII‐based circuit representations for the gyrators, obtained from mapping nullor–mirror pairs in the ... the type of the CCII terminals handling the gyrator input and output signals. In topology I, the gyrator input and output terminals are CCIIs Y – Z ‐ ...
Tópico(s): Advancements in Semiconductor Devices and Circuit Design
2007 - Wiley | International Journal of Circuit Theory and Applications
Ali Toker, Ali Zeki, Oğüzhan Çiçekoğlu,
All possible gyrator circuits using the minimum number of voltage and current unity-gain cells are extracted, as a result of ... unity-gain cells, are very suitable for such gyrators, it is shown that inclusion of the recently ... design enables implementation of all types of extracted gyrators. The number of possible gyrator configurations is eight, one of them being the well-known Sedra–Smith gyrator and another its x -input counterpart; both utilize only CCIIs. The remaining possible six gyrators are new and utilize ICCIIs as well. Like ...
Tópico(s): Advancements in PLL and VCO Technologies
2001 - Taylor & Francis | International Journal of Electronics
... elements, which are used in the realisation of gyrators, are investigated. Nullator-norator equivalent circuits for gyrators are derived by using the n.i.c. ... into physical networks by using the proved equivalence. Gyrator circuits are obtained by replacing nullors by operational amplifiers. A stability analysis of the gyrator circuits is produced and a relevant theorem concerning ... The feasible Qfactors and the accuracy of the gyrator circuits are indicated by some experimental results. A ... c. theory, and it is shown that the gyrator circuits described can be used as g.i. ...
Tópico(s): Radio Frequency Integrated Circuit Design
1969 - Institution of Electrical Engineers | Proceedings of the Institution of Electrical Engineers
W.H. Holmes, W. Heinlein, S. Grützmann,
The practical realization in gyrator-C form of a seventh-order Cauer-parameter low-pass filter with 40-dB stopband attenuation is described. The three ... filter were replaced by capacitor-loaded semi-floating gyrators. The gyrators were realized in hybrid form using thick-film ... RC filter methods) shows the inherent suitability of gyrator-C filters for integration. Also in this paper some of the special problems and characteristics of gyrator-C filters are theoretically discussed, in particular the realization of gyrators with floating ports, gyrator Q-enhancement, and component ...
Tópico(s): Acoustic Wave Resonator Technologies
1969 - Institute of Electrical and Electronics Engineers | IEEE Journal of Solid-State Circuits
Ken Adams, E.F. Deprettere, J.O. Voorman,
This chapter describes the importance of gyrator in electronic systems. The developments in the electronic technology combined with increasing insight into the theoretical basis of physical systems have led to a growing interest in the gyrator and its applications. The gyrator is an example of a nonenergic system. The ... port combinations of the nonenergic one-ports. The gyrator-resistor combination is known as an isolator and ... found that no other nonreciprocal element than the gyrator is required to characterize linear, time-invariant, nonreciprocal ...
Tópico(s): Photonic and Optical Devices
1975 - Elsevier BV | Advances in electronics and electron physics
Xin Zhuang, Chung Ming Leung, Jiefang Li, G. Srinivasan, D. Viehland,
Magnetoelectric (ME) gyrators are unique circuit elements capable of direct conversion of the current to voltage or vice versa. In order ... the power conversion and loss processes in the gyrators, an equivalent input loss factor has been developed ... conversion efficiency for the electric power in ME gyrators. Studies have been carried out for modeling the ... equations reveals that the efficiency of the ME gyrator is related to the product of the effective ... key ingredients to enhance the efficiency of ME gyrators. We have successfully realized a power efficiency of ...
Tópico(s): Ferroelectric and Piezoelectric Materials
2018 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Industrial Electronics
Chung Ming Leung, Xin Zhuang, Min Gao, Xiao Tang, Junran Xu, Jiefang Li, Jitao Zhang, G. Srinivasan, D. Viehland,
... this study, three different coil-based magnetoelectric (ME) gyrators of different geometries, including gyrators with high power output, have been designed and ... piezoelectric/magnetostrictive/piezoelectric (P-M-P) type ME gyrators, which consisted of nickel zinc ferrite (NZFO) and ... ceramic plates. Compared with M-P-M ME gyrators, the P-M-P ones exhibited a higher ... of the NZFO ferrite layer in the ME gyrator explains the resilience of the P-M-P ... The findings open the possibility of using ME gyrators in high power applications.
Tópico(s): Magnetic and transport properties of perovskites and related materials
2017 - American Institute of Physics | Applied Physics Letters
... color-information security system based on joint-extended gyrator transform correlator is introduced. In this method, the ... mask and a random phase key code are gyrator transformed separately. The two obtained information multiplexed to form a joint gyrator power spectrum, which is again gyrator transformed to get a joint-extended gyrator power spectrum. The same phase key code is ... any noise and distortion. The angle parameters of gyrator transform in each channel are additional encryption keys ...
Tópico(s): Advanced Optical Imaging Technologies
2012 - Elsevier BV | Optics and Lasers in Engineering
... expansion method for systematically synthesizing OTA-based floating gyrators. After describing nullor-mirror components of OTAs, class I, II and III gyrators, which can be built with standard OTAs, are ... equivalent models described by NAM. The class-I gyrators employing two DO-OTAs have four equivalent realizations, the class-II gyrators employing three SO-OTAs have eight equivalent realizations, and the class-III gyrators employing four SISO-OTAs have 16 equivalent realizations. ... notch filter constructed by the OTA-based III gyrator are presented to verify the realizability of the ...
Tópico(s): Radio Frequency Integrated Circuit Design
2012 - Elsevier BV | AEU - International Journal of Electronics and Communications
The three port gyrator was introduced and defined in [1] in two alternative forms of the admittance matrix (Y). Four alternative realizations of the three port gyrator using three transconductance amplifiers (TA) are given, three of them are new. Sixteen alternative three port gyrator circuits using four current conveyors (CCII) or four ... grounded resistors are given. Eight alternative three port gyrator circuits using two CCII or two ICCII or ... resistors are also introduced. Eight alternative three port gyrator circuits using two CCII or two ICCII or ...
Tópico(s): Wireless Power Transfer Systems
2011 - Elsevier BV | AEU - International Journal of Electronics and Communications
A. Cid‐Pastor, L. Martı́nez-Salamero, Corinne Alonso, G. Schweitz, Javier Calvente, S. Singer,
A systematic procedure to synthesise power gyrators for variable switching frequency operation is presented. Based on the gyrator equations, topological constraints are first established and two types of gyrators, i.e. G and R, are defined. A ... to have the unconditionally stable characteristics of G-gyrators with a controlled input current whereas a buck ... Čuk converter are shown to behave as G-gyrators with a controlled output current if damping networks ... is shown to behave as a power R-gyrator with stable dynamics.
Tópico(s): Multilevel Inverters and Converters
2006 - Institution of Engineering and Technology | IEE Proceedings - Electric Power Applications
Wenqing Sun, Lei Wang, Jun Wang, Hua Li, Quanying Wu,
... phase masks based on gamma distribution in the gyrator domain is proposed. In this scheme, two random ... And then they are encoded by the first gyrator transform. The resulting information is again encrypted by ... second gamma distribution random phase mask at the gyrator frequency plane. The final results are encoded by the second gyrator transform. Numerical simulations are presented to confirm the ... validity, and flexibility of the proposed idea. The gyrator transform rotation angle sensitivity test is also simulated. ...
Tópico(s): Advanced Image and Video Retrieval Techniques
2018 - Springer Nature | Journal of the European Optical Society Rapid Publications
Isha Mehra, Areeba Fatima, Naveen K. Nishchal,
The gyrator transform is a linear canonical transform, which generates the rotation of an optical signal in position-spatial frequency planes. Gyrator wavelet transform is a relatively newer optical information processing tool obtained by combining the gyrator transform with the wavelet transform. This combination provides ... study of features, applications, and implementation of the gyrator wavelet transform is presented. This work studies the features of the gyrator wavelet transform, which can find a role in ...
Tópico(s): Seismic Imaging and Inversion Techniques
2017 - Institution of Engineering and Technology | IET Image Processing
Chung Ming Leung, Xin Zhuang, Junran Xu, Jiefang Li, G. Srinivasan, D. Viehland,
A gyrator that is capable of current-to-voltage conversion can be realized with a magnetoelectric (ME) composite of ... thickness of the two ferroic phases in a gyrator of Terfenol-D and PZT. Both experimental and ... layers (n), magnetic field bias (HBias) and several gyrator parameters, such as the resistance load (RL), were ... to composite (n = 0.28) in coil-ME gyrators, a high power efficiency of 73.9% was ... HBias range. This improved power efficiency promises ME gyrators for power transfer devices.
Tópico(s): Magnetic and transport properties of perovskites and related materials
2017 - American Institute of Physics | Applied Physics Letters
Isha Mehra, Naveen K. Nishchal,
... a new optical information processing tool termed as gyrator wavelet transform to secure a fully phase image, based on amplitude- and phase-truncation approach. The gyrator wavelet transform constitutes four basic parameters; gyrator transform order, type and level of mother wavelet, ... its sensitivity to the encryption parameters, such as, gyrator transform order, and robustness has also been analyzed. ... computer simulation results demonstrate the abilities of the gyrator wavelet transform as an effective tool, which can ...
Tópico(s): Fractal and DNA sequence analysis
2015 - Elsevier BV | Optics Communications
... and a double structured phase mask in a gyrator transform domain is proposed. The amplitude transmittance of ... mask. They are then encoded by the first gyrator transform. The resulting information is again encrypted by a second random phase mask placed at the gyrator transform plane and transmitted through the second structured phase mask, and then encoded by the second gyrator transform. The system parameters of the structured phase mask and gyrator transform in each channel serve as additional encryption ...
Tópico(s): Saffron Plant Research Studies
2012 - Optica Publishing Group | Applied Optics
... securing color information based on Arnold transform in gyrator transform domain. A color image is first separated ... image plane, and employed first Arnold transform and gyrator transform. The second random phase mask is placed at gyrator transform plane, and employed second Arnold transform and gyrator transform. The system parameters of Arnold transform and gyrator transform in each channel serve as additional keys ...
Tópico(s): Advanced Data Compression Techniques
2011 - Elsevier BV | Optics and Lasers in Engineering
Zhengjun Liu, Lie Xu, Chuang Lin, Shutian Liu,
Based on an optical gyrator transform system, an image encryption algorithm is designed and studied. An original secret image is regarded as the output intensity of the second gyrator transform. A coherent nonuniform optical beam is converted into the input of the first gyrator transform. A Gerchberg-Saxton phase retrieval algorithm is ... for obtaining the compensation phases in the first gyrator transform pair. The compensation phases are regarded as ... algorithm. The parameters of the laser beam and gyrator transform can serve as the additional key of ...
Tópico(s): Advanced Steganography and Watermarking Techniques
2010 - Optica Publishing Group | Applied Optics
A. Cid‐Pastor, L. Martı́nez-Salamero, Corinne Alonso, Abdelali El Aroudi, Hugo Valderrama‐Blavi,
... can be efficiently implemented by means of power gyrators. A modular architecture for a dc bus based on the connection of N g-gyrators and one r-gyrator is proposed to perform source splitting and achieve ... paralleling the N output ports of the g-gyrators whose corresponding input ports are excited by independent ... Output voltage regulation is provided by the r-gyrator stage, which is connected in cascade with the ...
Tópico(s): Multilevel Inverters and Converters
2009 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Power Electronics
A systematic approach for synthesising gyrator-C active transformers using MOS transistors is presented. The topology of gyrator-C active inductors and their characteristics are briefly reviewed ... This is followed by the development of ideal gyrator-C active transformers, where only the capacitor loads ... active transformers are investigated in detailed. Non-ideal gyrator-C active transformers are developed with the consideration ... and mutual inductances is derived. The configuration of gyrator-C active transformers with multiple primary and secondary ...
Tópico(s): Analog and Mixed-Signal Circuit Design
2007 - Institution of Engineering and Technology | IET Circuits Devices & Systems
M. Wakefield, Howard A. Bell, Elaine Fitches, John Edwards, Angharad M. R. Gatehouse,
... the subsequent development of its solitary endoparasitoid Meteorus gyrator (Thunberg) was also studied. No significant effects on the life cycle parameters of M. gyrator developing in L. oleracea fed on GNA-containing ... at parasitism had a greater influence on M. gyrator development than the presence of GNA. Potential GNA- ... the gut and body tissues of larval M. gyrator. Despite detection in host tissues, GNA could not be detected in adult M. gyrator and therefore it is likely that at the time of pupation M. gyrator are able to void the GNA in the ...
Tópico(s): Insect symbiosis and bacterial influences
2006 - Cambridge University Press | Bulletin of Entomological Research
Doron Shmilovitz, I. Yaron, S. Singer,
A new approach to efficient gyrator realization is described. The approach was motivated by the observation that a /spl lambda//4 segment of transmission line exhibits gyrator-like behavior. A gyrator that operates at low-frequency band, including dc, ... line, are loss free (in principle), the resulting gyrator is also lossless. Such a gyrator can find applications in power processing circuits. A ...
Tópico(s): Advancements in PLL and VCO Technologies
1998 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications
A gyrator circuit containing only three transistors has been designed by providing an active feedback path such that the ... the excellent performance of the circuit as a gyrator, impedance inverter, and isolator over wide ranges of ... their application demonstrated by actual design of the gyrator circuit to realize specified open-circuit (o.c.) ... easily obtained by adjusting single passive elements. The gyrator is then cascaded in between two RC two- ...
Tópico(s): Radio Frequency Integrated Circuit Design
1965 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Circuit Theory
... traditional approach to simulate ungrounded inductors in active gyrator filters uses two gyrators with all equal transconductances. However, this paper shows that the differences between gyrator transconductances can be employed to obtain certain advantages. ... by using an appropriate theoretical model of the gyrator simulated floating inductance in the filter design process. ... gives a unified approach for theoretical analysis of gyrator LC filters with floating inductors.
Tópico(s): Innovative Energy Harvesting Technologies
2008 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Circuits & Systems II Express Briefs
Xin Zhuang, Chung Ming Leung, J. Li, D. Viehland,
... the power conversion and loss processes in magnetoelectric gyrators. Two types of loss mechanisms were identified by using a transformer-gyrator structure, which transfers power between magnetic and magnetomechanical ... A missing portion of the power in a gyrator was then identified to be a returned power ... 70% and 50% were achieved for magnetoelectric (ME) gyrators based on Metglas/Pb(Zr,Ti)O3 laminated ...
Tópico(s): Magnetic and transport properties of perovskites and related materials
2017 - American Institute of Physics | Applied Physics Letters
... security system based on generalized Arnold map in gyrator transform domain is investigated. In this cryptosystem, a ... independently permutated with generalized Arnold map and then gyrator transformed. The gyrator spectrum of each channel is multiplied together to ... key, respectively. Finally, the first encrypted image is gyrator transformed and then phase- and amplitude-truncated to ...
Tópico(s): Cryptographic Implementations and Security
2015 - Elsevier BV | Optics Communications
... encoding and watermarking using coupled logistic maps and gyrator wavelet transform is presented. The proposed method employs ... two symmetrically coupled identical logistic maps and then gyrator transformed. The gyrator spectrum of each channel is multiplied together and ... keys beside parameters of coupled logistic maps and gyrator transform. As a result, the key space is ...
Tópico(s): Image and Video Stabilization
2015 - Optica Publishing Group | Journal of the Optical Society of America A
... system based on singular value decomposition (SVD) in gyrator transform (GT) domains is proposed. In the encryption ... modulated by random phase masks and then separately gyrator transformed at different parameters. The three gyrator spectra are joined by multiplication to get one ... by SVD. All the three parts are individually gyrator transformed at different transformation angles. The three encoded ...
Tópico(s): Fractal and DNA sequence analysis
2014 - Elsevier BV | Optics and Lasers in Engineering
A new asymmetric cryptosystem using Schur decomposition in gyrator transform (GT) domain is introduced. In this approach, ... image by using convolution. The convoluted image is gyrator transformed. The gyrator spectrum is then amplitude- and phase-truncated. The ... decomposition. Finally, U and T parts are independently gyrator transformed to obtain two encoded images, which can ...
Tópico(s): Cellular Automata and Applications
2014 - Elsevier BV | Optics and Lasers in Engineering