Ashish Ranjan

Simulation and experimental study of ZnO thin film deposited over p-Si with Al contact

This paper comes with Zinc Oxide (ZnO) thin film deposition over virtually grown p-Si substrate and fabricated using the E-beam evaporation PVD technique. The simulation analysis of ZnO TF/p-Si introduces photo-generation rate, spectral response that has been carried out using the Silvaco ATLAS software. The surface morphology and structural characterization has been done by Field Emission Scanning Microscopy (FESEM) and X-Ray Diffraction (XRD) analysis. The electrical characterization is verified in dark and light condition which shows the rectifying behavior of the Al schottky contact. The turn-on voltage is around 1V for the device.

Fractional order device modeling using higher order approximation

This paper introduces higher order approximation for the fractional order device using numerical methods. The proposed method for the approximation of fractional order device is emanated from the well-known Newtons method based higher order iterations namely, Householder. The designed model emulates the characteristics of fractional order device. The realization of fractional order capacitor is done using passive network synthesis method and compared with existing methods. The fractional device obtained from numerical methods is well verified through PSPICE simulation.

Design of transmission gate using electro-optic effect of lithium niobate based Mach–Zehnder interferometers

Optical integrated circuits for computing and information processing could overcome the speed limitations of semiconductor electronics. However, in photonics, very few fundamental building blocks equivalent to those used in multi-functional electronic circuits exist. In this paper, transmission gate based on electro-optic effect inside lithium niobate based Mach–Zehnder interferometers (MZI) is described. Transmission gates are typically used as building blocks for logic circuitry in integrated circuit design. It is a combination of NMOS and PMOS transistors. Lithium niobate based MZI has a phenomenal competence to switching optical signal to a desired output port. Here, proposed device is elucidated with the help of mathematical description and thereafter simulation using MATLAB. 2xa0

Realization of single and double cole tissue models using higher order approximation

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Four Input Single Output based third order universal filter using Four Terminal Floating Nullor

×xa01 multiplexer is also designed using proposed transmission gate. The study is verified using beam propagation method.

Fourth Order Band Pass and All Pass Filter using Single FTFN

This paper brings an active fractional order device realization using an Op-amp (LM741) and few passive components. The fractional device model is derived from the rational approximation of fractional-order operator. Here continued fraction expansion is used to obtain the transfer function for the active realization of s ±0.5. RC-RC decomposition technique is used to synthesize the transfer function. The verification of the design is done using PSPICE to validate the theoretical as well as ideal result.

Universal Biquadratic filter with minimum number of Active FTFN

This paper brings a design methodology of biological tissues that exhibits Single Cole and Double Cole model. These tissue models are based on fractional order RC ladder logic design. The Nyquist plots for these Cole models are obtained after finding the impedance parameters by using very familiar indirect measurement scheme like Continued Fraction Expansion (CFE) method. For getting the wide range of frequency 10 terms of CFE is considered for better result. Biological tissue Modeling based on fractional order circuit model have practical applications in biomedicine and bioengineering. The fractional order biological tissue models and its related impedance plots obtained through PSPICE simulation.