A CMOS class D phase locked loop based PWM generator is presented in this paper. The implementation is done in a 90nm CMOS process using CADENCE tool. The architecture in this project eliminates the requirements for a high-quality carrier generator and a high-speed voltage comparator that are often required in PWM implementations. Voltage comparison is replaced by Phase comparison and precise r...

A new design of Ultra-Wide band (UWB) generator is described in this paper. The UWB impulse generator circuit is the most essential block in a mono-band UWB transmitter. The proposed ultra wide band impulse generator circuit utilizes the performances of the CMOS technology e®ectively, it is composed of a voltage controlled oscillator (VCO), and a rectangular pulse generator (RPG) and mixer. The...

In this study, Brillouin Gain Spectrum (BGS) is experimentally analyzed in the Brillouin Optical Time Domain Reflectometry (BOTDR) and Brillouin Optical Time Domain Analyzer (BOTDA). For this purpose, the signal level of the microwave generator is varied and the effects of BGS are investigated. In the setups, 20 km conventional single mode fiber is used to both setups and laser wavelengths are ...

This paper describes the design, construction, and testing of a multi-channel fetal electrocardiogram (fECG) signal generator based on LabVIEW. Special attention is paid to the fetal heart development in relation to the fetus' anatomy, physiology, and pathology. The non-invasive signal generator enables many parameters to be set, including fetal heart rate (FHR), maternal heart rate (MHR), gest...

Due to increase in number of vehicles, Traffic is a major problem faced in urban areas throughout the world. This document presents a newly developed Matlab Simulink model to compute traffic load for real time traffic signal control. Signal processing, video and image processing and Xilinx Blockset have been extensively used for traffic load computation. The approach used is Edge detection oper...

in this paper, the unified power flow controller (upfc) is enhanced with a chaotic particle swarm optimization (cpso) damping controller in order to mitigate the low frequency oscillations (lfo) in a single machine infinite bus (smib) power system. the designed damping controller is an optimized lead-lag controller, which extracts the speed deviation of the generator rotor and generates the out...

The special generator of testing signal was designed for the frequency of 441.171 kHz. The generator consists of the special crystal oscillator and a high power amplifier. The frequency stability of the generator is in order of 10/day, the output power 1W, the value of SINAD is close to 120 dB and the total harmonic distortion under 170 dB by using of linear narrow-band filter.

This paper presents a high-quality and area-efficient ramp generator to be used for on-chip testing of analog and mixed-signal circuits. An original adaptive scheme is developed to palliate the inaccuracy of a basic ramp generator. As a result, the proposed adaptive ramp generator exhibits very good performances in terms of slope precision and ramp linearity while maintaining a low area overhead.