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VOLUME 3, ISSUE 9, SEPTEMBER 2015
Active Compensation of CFOA based Non-Inverting Amplifier
Dattaguru V. Kamath, Ashoka A
Design and Comparison of Two X Slotted and One Wide Slot Loaded and No Slot- Loaded Square Shaped Micro-strip Patch Antenna
Dhammanand S. Nagrale, Abhinavbharghav
Fractional Calculus based Dynamic Analysis of Stepper Motor with Leadscrew
Priyabrata BIswal, Girija Sankar Rath, Jagadish Chandra Pati
|DOI: 10.17148/IJIREEICE.2015.3903
Response of 2-input 3-state MIMO Model of an Instrument Control Motor
S P Kumar Patnaik M, DR. M. Ramesh Patnaik
Robust Digital Image Watermarking Based on Gradient Vector Quantization and Denoising using Bilateral Filter and its Method Noise Thresholding
I. Kullayamma, P. Sathyanarayana
A Simple and Fastest Method of Evaluating Available Transfer Capability
M. Venkateswara Rao, S. Sivanagaraju, Chintalapudi V Suresh
Design of Secured Wireless Real Time Electronic Voting Machine
Subhadeep Chakraborty, Sandip Karmakar, Rima jana, Subhradeep Dey
Design and Determination of Optimum coefficients of High-Q IIR Notch Filter
Subhadeep Chakraborty, Abhishek Dey, Kushal K. Saha, Nabanita Dutta
Closed Loop Control of an Interleaved Buck Converter with High Step-Down Conversion Ratio and Low Switch Voltage Stress
Navami Mohan, Dr. N. Prabhakaran
Comparison between Conventional and Modified Cascaded H-Bridge Multilevel Inverter-Fed Drive
Gleena Varghese, Tissa Tom, Jithin K Sajeev
Performance Prediction of Solar Thermal Parabolic Trough Concentrator System (STPTCS) by Enhancement of Heat Transfer
Y. K. Nayak, U. K. Sinha, Nilesh Kumar, P. Kumar
A Novel Multilevel Inverter with Reduced DC Sources
Ambili R, Fareeda A Kareem
Abstract
Active Compensation of CFOA based Non-Inverting Amplifier
Dattaguru V. Kamath, Ashoka A
DOI: 10.17148/IJIREEICE.2015.3901
Abstract: In this paper, we consider active compensation techniques using a voltage buffer to enhance the bandwidth of current feedback operational amplifier (CFOA) based finite gain non-inverting voltage amplifier. The use of feed forward capacitor in addition to voltage buffer is shown to achieve minimum phase error in the resulting frequency response. The proposed circuits require one additional CFOA/ capacitor. The effect of finite output impedance at z terminal, input resistance at x terminal, and current mirror pole of the CFOA are studied. The circuits considered have been simulated in PSPICE using a behavioral macro-model of the CFOA as well as that of a practical CFOA AD 844.
Keywords: Current-feedback op-amp (CFOA); Active compensation;Passive compensation.
Keywords: Current-feedback op-amp (CFOA); Active compensation;Passive compensation.
Abstract
Design and Comparison of Two X Slotted and One Wide Slot Loaded and No Slot- Loaded Square Shaped Micro-strip Patch Antenna
Dhammanand S. Nagrale, Abhinavbharghav
DOI: 10.17148/IJIREEICE.2015.3902
Abstract: In this paper we present a proposed design for square shaped micro-strip patch antenna by cutting two X shape slots and one wide slot at the surface of the square patch. Using proposed antenna design and probe feeding at proper position we will compare the resultant return loss, VSWR and impedance with the results of no slot loaded square shaped micro-strip patch antenna. We are using IE3D simulation software for designing and analysis. We have observed that using slotted patch antenna and using probe feed at proper location we can get better return loss, VSWR and impedance.
Keywords: Slotted Square shaped micro-strip patch antenna, return loss, VSWR.
Keywords: Slotted Square shaped micro-strip patch antenna, return loss, VSWR.
Abstract
Response of 2-input 3-state MIMO Model of an Instrument Control Motor
S P Kumar Patnaik M, DR. M. Ramesh Patnaik
DOI: 10.17148/IJIREEICE.2015.3904
Abstract: The paper deals with behavior of Multi Input Multi Output (MIMO) state space models for different types of inputs. To achieve a satisfactory response the study of plant control is necessary. The standard input signals are analyzed by taking a state space industrial D.C servo motor model. The model is built using control and simulation loop present in Lab VIEW software. The responses depend on the values of state-space matrices, magnitude of the gain provided in the feedback mechanism and also on the behavior of the continuous linear systems like Integrator and Derivative functions.
Keywords: MIMO, Lab VIEW, State space, Model Predictive Control (MPC).
Keywords: MIMO, Lab VIEW, State space, Model Predictive Control (MPC).
Abstract
Robust Digital Image Watermarking Based on Gradient Vector Quantization and Denoising using Bilateral Filter and its Method Noise Thresholding
I. Kullayamma, P. Sathyanarayana
DOI: 10.17148/IJIREEICE.2015.3905
Abstract: Digital watermarking is a solution to the problem of copyright protection and authentication of multimedia data while working in a networked environment. We propose a robust quantization-based image watermarking scheme, called the gradient direction watermarking (GDWM), and based on the uniform quantization of the direction of gradient vectors. In GDWM, the watermark bits are embedded by quantizing the angles of significant gradient vectors at multiple wavelet scales. The proposed scheme has the following advantages: 1) Increased invisibility of the embedded watermark, 2) Robustness to amplitude scaling attacks, and 3) Increased watermarking capacity. To quantize the gradient direction, the DWT coefficients are modified based on the derived relationship between the changes in coefficients and the change in the gradient direction. This watermarking technique is more robust to various sizes of watermark images. The Gaussian filter is a local and linear filter that smoothens the whole image irrespective of its edges or details, whereas the bilateral filter is also a local but non-linear, considers both gray level similarities and geometric closeness of the neighboring pixels without smoothing edges. The extension of bilateral filter: multi- resolution bilateral filter, where bilateral filter is applied on approximation sub bands of an image decomposed and after each level of wavelet reconstruction. The application of bilateral filter on the approximation sub band results in loss of some image details, where as that after each level of wavelet reconstruction flattens the gray levels there by resulting in a cartoon-like appearance. To tackle these issues, it is proposed to use the blend of Bilateral and its method noise thresholding using wavelets. In various noise scenarios, the performance of proposed method is compared with bilateral denoising method and found that, proposed method has inferior performance.
Keywords: Bilateral, Bilateral and Detailed Thresholding, Denoising, Digital Watermarking, Gradient Direction Quantization, Robust.
Keywords: Bilateral, Bilateral and Detailed Thresholding, Denoising, Digital Watermarking, Gradient Direction Quantization, Robust.
Abstract
A Simple and Fastest Method of Evaluating Available Transfer Capability
M. Venkateswara Rao, S. Sivanagaraju, Chintalapudi V Suresh
DOI: 10.17148/IJIREEICE.2015.3906
Abstract: Congestion management is necessary in electricity market, when the transmission network is unable to accommodate the transactions required in that particular system. If the congestion management is not taken care, then the system operating limits will not be in the prescribed limit. In competitive markets, the congestion management is more complex than the ordinary system and it leads to more disputes among the power suppliers as well as consumers. In order to overcome these limitations, each utility manages the congestion, by following certain physical or financial mechanisms. The ATC of power system network gives the status of unutilized power at any time and depends on many factors due to the thermal, voltage and stability considerations. The main factors which will decide the ATC are system load level, load distribution in network, power transfer between areas, and the limit imposed on the transmission network etc. This information will be helpful for power marketers, sellers and buyers to participate in the commercial activities.For this, severity index is considered to identify the most critical transmission line in a given system. Later, the effect of ATC under normal and contingency conditions is analyzed on IEEE-6 bus & Indian -24 bus test system with supporting numerical and graphical results.
Keywords: ATC; contingency condition; direct method;
Keywords: ATC; contingency condition; direct method;
Abstract
Design of Secured Wireless Real Time Electronic Voting Machine
Subhadeep Chakraborty, Sandip Karmakar, Rima jana, Subhradeep Dey
DOI: 10.17148/IJIREEICE.2015.3907
Abstract: Electronic Voting Machine or EVM is generally used to count the poll result at the time of vote. In EVM generally a counting part is available where the counting are done and the count value is stored in the memory. In this paper, the design of the Wireless EVM has been proposed where the counting will be done in a remote section to avoid the fault or error caused by the several problems such as wrong button press, wrong counting, theft caused by the Stationary EVM. The data will be transferred from the EVM machine through a transmitter and this signal will be caught up by the receiver of the Counting module. The count will be shown at the display side as per preference that is the real time display cab ne turned off during the poll time. In this device, the voter cannot press the poll button of their preference twice as the device will be deactivated after single press. That is why the design proposed in this paper is of reduced error and works efficiently.
Keywords: Wireless Data Acquisition, RF Module, Microcontroller, Security, Signal encoding and decoding, Wireless Count, Real time system.
Keywords: Wireless Data Acquisition, RF Module, Microcontroller, Security, Signal encoding and decoding, Wireless Count, Real time system.
Abstract
Design and Determination of Optimum coefficients of High-Q IIR Notch Filter
Subhadeep Chakraborty, Abhishek Dey, Kushal K. Saha, Nabanita Dutta
DOI: 10.17148/IJIREEICE.2015.3908
Abstract: In Digital Signal Processing, there are different applications are found for Filters. The filters are categorised and designed as IIR filter or FIR filter for different applications dependent upon impulse response. In this paper a notch filter is designed of high quality factor to cut specifically 100Hz. This notch frequency is chosen because at that frequency some noise may be observed or harmonics of the main signal may me observed that can be referred as the noise. To stop or notch those type of noise and as the frequency standard for main electricity is 50Hz , the corresponding suitable Notch filter is designed which perfectly cut 100Hz frequency without using any amplification device. The simulations are done on the IIR Notch Filter and the result shows that the analog filter, that is designed from which the IIR filter is designed is highly accurate in specification of components and other required parameters which is reflected in the coefficient values.
Keywords: IIR Filter, Notch filter, Digital filters, analog to digital mapping, coefficients.
Keywords: IIR Filter, Notch filter, Digital filters, analog to digital mapping, coefficients.
Abstract
Closed Loop Control of an Interleaved Buck Converter with High Step-Down Conversion Ratio and Low Switch Voltage Stress
Navami Mohan, Dr. N. Prabhakaran
DOI: 10.17148/IJIREEICE.2015.3909
Abstract: Interleaving can be thought of as a method of paralleling converters but it has got additional benefits to offer in addition to those obtained from conventional approaches of paralleling converters. Interleaved converters due to its simple structure and low control complexity are widely used in applications where non-isolation and high output current with low ripples are required. They have got certain drawbacks such as high cost and high switching losses and require high voltage rated devices. These drawbacks can be rectified by means of a new interleaved DC-DC converter in which two input capacitors are series-charged by the input voltage and parallel discharged for providing a much higher step-down conversion ratio. This paper employs capacitive voltage division principle for increasing the step- down conversion ratio and reducing voltage stresses of active switches. Thus lower voltage rating switches can be used to reduce switching losses and the overall efficiency is improved. Moreover, due to the charge balance of the blocking capacitor, the converter features automatic uniform current sharing characteristic of the interleaved phases without adding extra circuitry or complex control methods. The closed loop control of the paper is carried out using MATLAB R2012a environment and results are obtained. The closed loop control is given using a PI controller. Finally, a prototype circuit is implemented with 110 V input voltage and 5.5 V output voltage.
Keywords: IBC, interleaving technique, step-down conversion ratio, low switch voltage stress.
Keywords: IBC, interleaving technique, step-down conversion ratio, low switch voltage stress.
Abstract
Comparison between Conventional and Modified Cascaded H-Bridge Multilevel Inverter-Fed Drive
Gleena Varghese, Tissa Tom, Jithin K Sajeev
DOI: 10.17148/IJIREEICE.2015.3910
Abstract: Inverters are static power electronics devices which convert dc input voltage to ac output voltage with the desired magnitude and frequency. The output voltage waveforms of ideal inverters should be sinusoidal. But practically it is square-wave or quasi-square-wave. To get better waveforms with low harmonic distortion, multi- level inverters are used. Multilevel inverter starts with a level of three. The topology used here is cascaded H-Bridge and the modulation technique is sinusoidal pulse width modulation. Here a comparison between conventional and modified cascaded H-Bridge inverter is done. The load of the inverter is induction motor. The number of output voltage level is five. Simulation is done in MATLAB 2011b environment and the waveforms are obtained. Finally, a prototype circuit of modified Cascaded H-Bridge inverter is implemented.. The results are analyzed using MATLAB/SIMULINK software. The hardware implementation is done using FPGA.
Keywords: Sinusoidal Pulse Width Modulation, Cascaded H-Bridge, Total Harmonic Distortion, FPGA.
Keywords: Sinusoidal Pulse Width Modulation, Cascaded H-Bridge, Total Harmonic Distortion, FPGA.
Abstract
Diagnosing lung status using PPG-derived respiratory signals
Saino Renjit
DOI: 10.17148/IJIREEICE.2015.3911
Abstract: The measurement of human respiratory signals is crucial in field of medicine. A disordered breathing pattern can be the first symptom of different mechanical or psycho-logical dysfunctions. Therefore, a real-time monitoring of the respiration pattern is a critical need in medical applications. In clinical settings, respiration measurement methods are used a large number of sensors to the patient‟s body for recording vital signals, which might interfere with natural breathing of the patients and also cause discomfort if used for longer durations. This paper presents a novel algorithm for diagnosing lung status using photoplethysmographic (PPG) derived respiratory signals. The algorithm contains two steps. First one is the Respiratory cycle extraction process and second one is the Classification of respiratory activity. The pulse oximeter‟s PPG signals can be well utilized for extracting respiratory activity, avoiding the usage of additional sensor for recording respiratory signal. Modified Multiscale Principal Component Analysis (MMSPCA) is used for extraction of respiratory activity embedded in the PPG signals. Functioning of the proposed algorithm is tested on the dataset consists of different PPG patterns i.e., normal, hypoventilations, hyperventilation‟s and kussmaul recordings available with MIMIC database of Physio net archive. The second part is the evaluation of lung status according to the respiratory signal which is extracted from the PPG signal in the first part. Multiclass support vector machine (MSVM) classifier or Kernel Nearest-Neighbour (knn) classifier are used to classify the respiratory signals according to the features extracted from respiratory signal. This paper presents a comparative study of the classification of respiratory cycle using MSVM and k-nn classifier.
Keywords: Modified MSPCA (MMSPCA), principal component analysis (PCA), Pulse oximeter‟s Photoplethysmo- Graphic (PPG) signal, respiratory signal, wavelets, Multiclass Support Vector Machine (MSVM), K-nn classifier.
Keywords: Modified MSPCA (MMSPCA), principal component analysis (PCA), Pulse oximeter‟s Photoplethysmo- Graphic (PPG) signal, respiratory signal, wavelets, Multiclass Support Vector Machine (MSVM), K-nn classifier.
Abstract
Performance Prediction of Solar Thermal Parabolic Trough Concentrator System (STPTCS) by Enhancement of Heat Transfer
Y. K. Nayak, U. K. Sinha, Nilesh Kumar, P. Kumar
DOI: 10.17148/IJIREEICE.2015.3912
Abstract: Performance prediction of STPTCS has been studied by enhancement of heat transfer rate using nanofluid, plain twisted tape and nail twisted tape inserts. Nanofluid and twisted tape inserts based STPTCS are commonly used in the area as such as industries, heating and cooling for buildings, thermal power plants, solar cooker, automobiles etc. This paper provides enhancement and performance prediction in heat transfer in absorber tube of concentrator using nanofluid and twisted tape inserts. The results obtained by simulation using C++ program.
Keywords: Solar Thermal Parabolic Trough Collector/Concentrator System (STPTCS), Nanofluid, Twisted Tape Insert, Heat Transfer, Heating and Cooling, Friction factor.
Keywords: Solar Thermal Parabolic Trough Collector/Concentrator System (STPTCS), Nanofluid, Twisted Tape Insert, Heat Transfer, Heating and Cooling, Friction factor.
Abstract
A Novel Multilevel Inverter with Reduced DC Sources
Ambili R, Fareeda A Kareem
DOI: 10.17148/IJIREEICE.2015.3913
Abstract: Multilevel inverters have become more popular in high power and high voltage application. They have a unique structure which makes it possible to reach high voltages with less harmonic content. Harmonic content of the output voltage waveform decreases as the number of output voltage level increases. The main advantages are lower Total Harmonic Distortion (THD), less stress on the power switches and higher efficiency. However, increase in the device count due to increased voltage levels makes the control method complex and hence expensive. This paper presents a nine level inverter with reduced DC sources which is capable of obtaining all additive and subtractive combinations of input DC levels. This topology requires less power switches compared to conventional multilevel inverter and less gate drives. The proposed topology is presented through a nine-level inverter with an appropriate modulation scheme and detailed simulation has been carried out in MATLAB/Simulink. A comparison is made between proposed topology and the conventional multilevel topology on the basis of device count, number of levels in the output voltage and THD.
Keywords: Multilevel Inverter (MLI); Phase Opposition Disposition SPWM; Power Electronics; Total Harmonic Distortion (THD).
Keywords: Multilevel Inverter (MLI); Phase Opposition Disposition SPWM; Power Electronics; Total Harmonic Distortion (THD).
Abstract
The Study of Active and Passive Transducers
S.Abhishek
DOI: 10.17148/IJIREEICE.2015.3914
Abstract: This paper illustrates the working of active and passive transducers, their characteristics and it lights up the theoretical study with its application. This thesis focuses the real world use of active and passive transducers with their major types of classifications.
Keywords: Sensing element, transductiom element, Thermocouple, LDR.
Keywords: Sensing element, transductiom element, Thermocouple, LDR.
Abstract
Overview of OPAMP and OTA based Integrators
Dattaguru V. Kamath
DOI: 10.17148/IJIREEICE.2015.3915
Abstract: The circuit realization of lossless and lossy integrators using active devices like opamp and OTA have been discussed. The realization of integrator in single ended and fully differential configurations is considered. The voltage- mode and current-mode integrators reported in the literature have been considered. The realization of OTA-based transadmittance type integrator has been considered. The OTA based integrator circuits have been simulated in PSPICE using a behavioral macro-model of the OTA as well with a practical CMOS OTA circuit. The amplitude and phase response plots obtained for OTA based integrators are presented.
Keywords: Opamp; Operational Transconductance Amplifier (OTA); Lossless and lossy integrator; Voltage-mode and current-mode integrator
Keywords: Opamp; Operational Transconductance Amplifier (OTA); Lossless and lossy integrator; Voltage-mode and current-mode integrator
Abstract
New OTA-C Current-mode Comb Filter
Dattaguru V. Kamath
DOI: 10.17148/IJIREEICE.2015.3916
Abstract: A new circuit realization for OTA-C current-mode comb filter is proposed to remove the undesirable multiple frequency signals. The proposed filter uses only OTAs and capacitors, hence suitable for monolithic integrated circuit implementation. The proposed OTA-C comb filter is simulated in PSPICE using a behavioral macro-model of the OTA as well with a practical CMOS OTA circuit. The workability of the comb filter is verified for hum signal frequencies of 60, 180 and 300 Hz that are found in bio-medical signals. The results obtained are in good agreement with theory.
Keywords: Operational Transconductance Amplifier (OTA); Continuous-time (CT) or analog filter; Voltage-mode and current-mode filter; Single-Output OTA (SO-OTA); Dual-Output OTA (DO-OTA); CMOS OTA; Harmonic interference; Comb filter
Keywords: Operational Transconductance Amplifier (OTA); Continuous-time (CT) or analog filter; Voltage-mode and current-mode filter; Single-Output OTA (SO-OTA); Dual-Output OTA (DO-OTA); CMOS OTA; Harmonic interference; Comb filter