A5103093415- Advancements in PLL and VCO Technologies
- Radio Frequency Integrated Circuit Design
- Electromagnetic Compatibility and Noise Suppression
- Low-power high-performance VLSI design
- Analog and Mixed-Signal Circuit Design
- Microgrid Control and Optimization
- Islanding Detection in Power Systems
- Electric Motor Design and Analysis
- Power Systems Fault Detection
- Semiconductor Lasers and Optical Devices
- Multilevel Inverters and Converters
- Botany, Ecology, and Taxonomy Studies
- Botanical Research and Applications
- Sensorless Control of Electric Motors
- Plant Diversity and Evolution
- Superconducting Materials and Applications
- Induction Heating and Inverter Technology
- Optimal Power Flow Distribution
- Gait Recognition and Analysis
- Context-Aware Activity Recognition Systems
- Anomaly Detection Techniques and Applications
Quaid-e-Awam University of Engineering, Science and Technology
2017-2022
Aix-Marseille Université
2013-2016
Centre National de la Recherche Scientifique
2015
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence
2013-2014
University of Sindh
2013
South Valley University
2006
The charge pump phase locked loop (CP-PLL) is widely used subsystem in modern mixed-signal electronic systems that are utilized digital and wireless applications such as clock generation, synchronization frequency synthesis. In the classical mode, combination of a current switched detector (CP-PFD) circuits produces an ideal pulse width modulated constant during one sampling period, which permits suitable transient performance. Nevertheless, many commercially CP-PLL chips (e.g., 4046 family)...
In islanding, a portion of the power network, comprised loads and distributed generation (DG) units, is isolated from rest grid forms micro (MG). this condition, it becomes essential for islanded MG to operate in stable controlled manner by providing ancillary services. When cut off main grid, islanding must be detected DG units. condition that one controllers should switched voltage-frequency (VF) control mode. network loses slack reference established VF controller. The voltage frequency...
The GARDNER's stability theory is vital for linear modeling and empirical design of the 2 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">nd</sup> 3 xmlns:xlink="http://www.w3.org/1999/xlink">rd</sup> order charge-pump phase locked loop (CP-PLL). This criterion general to identify boundary in steady state. It has been particularly applied PLL with a conventional current switched (CSCP). Ideally, CSCP supplies symmetrical pump currents. In some...
The Power Quality (PQ), security, reliability etc., are the prime objectives of power system. protection is developed in such a way that it should be selective, fast, reliable and cost effective. study about islanding Low Voltage (LV) CIGRE distribution networks like this has been proposed paper. This achieved by developing against short circuit faults which might appear at Medium (MV) bus. network with significant penetration Distributed Generations (DGs) complicated process. DG units...
The charge-pump Phase-Locked Loop (CP-PLL) is a widely used subsystem in wireless communication and smart system applications to perform the function of frequency synthesizer. Since CP-PLL mixed-signal system, it more complex analyze behavior, especially when voltage switched charge-pump-PLL (VSCP-PLL) used. A robust approach required for such non-linear pulse width modulated where overall gain loop varying due non-constant pump current. To sampled behavior VSCP-PLL, Event Driven (ED) model...
The analysis of the behavior Charge Pump Phase-Locked Loop (CP-PLL) is a challenging task due to its mixed-signal architecture. Out two types, i.e. Current Switched CP-PLL (CSCP-PLL) and Voltage (VSCP-PLL), prior produces symmetrical pump currents, resulting in an appropriate transient performance be analyzed. loop parameters are important set gain, target frequency, assure stability system. more bandwidth loop, which dependent on filter perform stable operation locking time. In this paper,...
This research focuses on the modeling of human gait in order to recognize a by their walking style. Gait analysis is very important parameter, especially for biometric systems and also healthcare applications. In this research, captured using only single Inertial Measurement Unit (IMU) sensor, which positioned top ankle. MATLAB mobile application used access IMU sensor. A small study 30 participants was conducted two databases are then developed with different features. The first database...
In modern electronic systems, PLLs are widely used for frequency synthesis applications. have a mixed analog-digital nature, which makes difficult to characterize its overall non-linear behavior using general theory of feedback system. To simulate the transient PLL often circuit level simulator is used. The divider separates loop in low and high parts leading small sampling time simulation time, major technological bottlenecks behavioral or transistor models. this paper, electrical...
The charge-pump phase locked loop (CP-PLL) is a mostly used integrated circuit (IC) in various modern electronics applications to perform several functions. Due its mixed analog and digital nature, often level simulators are characterize overall nonlinear dynamic behavior. Since the existing analytical methods not efficient account non-ideal non-linear effects. Furthermore, considering CP-PLL for frequency synthesis function, low high part result very long simulation times. Consequently,...
The charge-pump phase locked loop (CP-PLL) is a mixed signal system and it challenging task for designer to analyze the exact switching behavior of PLL using any general concept feedback systems. As order filter (LF) enhanced cancel pre-filter noise spurious signals, more complexity in analysis inevitable. operating with voltage switched (VSCP) complicated system, since representation not unique all states frequency detector (PFD). Therefore, possible characterize transfer function. In this...
The charge-pump phase-locked loop (CP-PLL) has gained an essential place in the wide area of radio frequency (RF) communication and industrial electronics. Since it is a combination analog digital elements, enhances complexity to study transient behavior arbitrary ordered CP-PLL using any general feedback system concept. Concerning PLL circuit, particularity that operating with voltage switched charge pump (VSCP) supplements peculiarity arising form non-constant current. Whereas its...
The aim of this study to provide possible criteria consider the stability Voltage Switched Charge-Pump Pump Phase Locked Loop (VSCP-PLL). Stability conventional CP-PLL architecture is often determined by Gardner's plane, when PLL system locked and near fixed point. In latest work it has been shown that, criterion not conservative enough considering initial condition far from However, based on operating with a Current Charge (CSCP), which provides an ideal pump current during switching...
This paper aims to present electromagnetic analysis and evaluation of efficiency linear generator for marine wave energy conversion using Finite Element Method (FEM). A Linear Generator (LG) with a novel shape magnet is proposed which has superior characteristics improves the as compared conventional magnet. Analysis (FEA) been carried out LG conventional, validates results identifies that enhances performance existing Two modes are analyzed; stationary dynamic their such mesh plot, no-load...
This paper presents a technique for starting three-phase reluctance motor fed from single-phase supply under low frequency supply. based on chopping the waveforms of voltage to achieve desired frequency. The chopper drive consists two switches, one chopped waveform and other discharged storage energy motor. can runs with due super harmonics accompanied division which increase steepness average torque-slip curve near synchronous speed. feasibility principle operation validity theoretical...