Electrical and Electronics

This paper presents the design and implementation of sharpening of maximally flat cascaded integrator comb compensation filters. Cascaded integrator-comb (CIC) digital filters are computationally efficient implementations of low pass filters. No multiplication characteristic makes them popular in hardware devices. The modified sharpened cascaded integrator comb compensation filter is used to improve magnitude response and gain. For narrow and wide-band compensation second-order and fourth-order linear phase filters are considered. Power-of-two decimation factors of CIC filter is M and number of adders are depends upon decimation factor. Closed form equations for the computation of the filter coefficients are provided. The new technique delivers gain and stop band attenuation correction comparable to existing techniques.

The experiment carried out on voltage and current measurement on TTL logic gates, by the students of electrical and information engineering in the final year of their studies, in the department’s laboratory, which help to understand the voltage and current characteristics of TTL gates and how also how to measure the voltage and current values of TTL gates. This experiment basically shows how voltage and current of TTL gate can be measured. KL- 22001 Basic Electrical/Electronic Circuit lab and KL-26001 Combinational Logic Circuit experiment module are the major equipment used to perform the experiment .These were used because it is much more self-explanatory and easier to work with compared other models. It was discovered that Due to its higher resistance value the LS series, TTL gates have lower input current than the standard series TTL gates. Their output currents are about equal.

In this paper, we present an efficient technique for compression of enhancement layers in scalable video coding (SVC). First we propose an improved interlayer prediction scheme which exploits the inherent redundancy of the underlying Laplacian pyramid with non biorthogonal filters. Secondly we introduce an orthogonal transform in parallel with the current 4x4 transform to improve the coding efficiency of the enhancement layer further. The improved prediction and the transform are implemented in the SVC reference software JSVM 4.0 as additional prediction modes. Experimental results demonstrate coding gains up to 1 dB for I pictures, and up to 0.7 dB for both I and P pictures, over a current implementation.

Electro Magnetic Interference (EMl) emission is always of grave concern for power electronic circuit designers. Due to rapid switching of high current and high voltage, interference emission is a serious problem in switching power circuits. Many products fail to make it to the market because of their failure to comply with the government EMI regulations. Numerous companies have cited EMI problems as the culprit in the delay of their product introduction; a new chaotic pulse width modulation (PWM) scheme is proposed and implemented to reduce the conducted electromagnetic interference (EMI) in power converters. Based on the analysis of constant frequency, Experiments have been made on a power converter. The experiment results show that the EMI spectrum is decided completely by the PWM spectrum, and the chaotic frequency-spreading has an obvious impact on EMI suppressing, compared with the other schemes. To chaoize a frequency-modulated signal which then modulates the carrier frequency. The proposed scheme not only suppresses the peaky EMI, but also avoids the occurrence of low-order noises and mechanical resonance.

A versatile low-voltage CMOS Fuzzifier circuit with a trapezoidal transconductance characteristic and independently programmable slope, height and horizontal position is designed in 0.35 m standard CMOS technology. The proposed circuit uses adaptive biasing linearization techniques to achieve wide tuning range. Simulation results using HSPICE and level 49 parameters (BSIM3v3) that verify the functionality of circuit with 1.5 V supply are presented.

Using fuzzy logic controller automatic braking system for automobiles is proposed. The response of the system will be simulated by using Fuzzy Logic Toolbox in MATLAB. The purpose of this controller is to brake a car when the car approaches for an obstacle at a specific range. For this, the Fuzzy Logic Controller is design using the Fuzzy Logic Toolbox in MATLAB. The system uses six rules and three membership function. The two parameters such as distance and speed will be observed. Output of the controller will determine the force of the car brake. Then PIC microcontroller is used to control servo motor based on detection pulse information to push pedal brake to brake the car and reduce the speed to maintain the safety distance between the front vehicles.

This paper presents power flow analysis of radial and meshed distribution systems taking into consideration of uncertain variations in load and line parameters. Interval arithmetic technique is used to model the power flow equations of distribution system to obtain the bus voltages and line active and reactive power flows. INTLAB Toolbox [14] is used to obtain the Hull of voltage profiles, line active and reactive power flows and line losses. Here we have studied the case of voltage profile, which is the key factor in deciding the active and reactive power flows in each line. The developed algorithm has been studied by considering Radial Distribution test systems of 15-Bus, 30-Bus, 33-Bus and 69-Bus available in the literature. The authors have verified the results obtained by the respective test systems with the developed algorithm for base case load and line data. The developed algorithm is easily modifiable to study the weakly meshed distribution system and this has been demonstrated for 33-Bus and 69-Bus test systems for which the Hull voltage profiles have been presented.

Intelligent driver systems and vehicle connectivity have made systems like RFID based traffic control systems, automatic collision notification obsolete. In addition to collision notification, cooperative collision avoidance and other applications using connectivity between the vehicle and signalized intersections have emerged. Applications avoiding collisions, enhancing fuel economy and reducing greenhouse gases (GHG) are the subject of this paper. The interaction between vehicle and traffic management systems could revolutionize the traffic problems of a crowded metropolitan city. This paper will employ connectivity as an enabling technology for sustaining the vision of smart and green transportation systems.

In the present study, the objective was to study the synthesis and analyse the zinc oxide nanoparticles from Anisochilus carnosus leaf extract. The study revealed that the plant extract possessed significant phytochemicals. The nanoparticles were synthesized using the leaf extract and analysed using UV, FTIR, SEM and XRD. Different functional groups were found to be present indicating the presence of diverse compounds in the extract. The zinc oxide nanoparticles also possessed potent antibacterial activity against many pathogenic organisms.

The global electrical energy consumption is rising and there is a steady increase of the demand on the power capacity, efficient production, distribution and utilization of energy. Power electronics, the technology of efficiently processing electric power, play an essential part in the integration of the dispersed generating stations for higher efficiency and better performance of the power systems. This project deals with the simulation of grid connected inverter for Photovoltaic applications. Space vector pulse width modulation (SVPWM) technique has been adopted for generating pulses for the two level inverter. The entire system comprising of Photovoltaic array (PVA) and two level inverter has been developed in Mat lab-Simulink. The PVA model characteristics including the effects of temperature and solar irradiation change on maximum power point are also presented in this paper. The inverter output has been synchronized with the grid using d-q theory and the power flow is controlled at 200kw. Finally, the inverter has been tested in grid connected mode.