this paper presents a novel control method to improve the efficiency of low-voltage dc-dc converters at light loads. pulse width modulation (pwm) converters have poor efficiencies at light loads, while pulse frequency modulation (pfm) control is more efficient for the same cases. switching losses constitute a major portion of the total power loss at light loads. to decrease the switching losses...

Forward converters generally exhibit poor power factor when employing in the AC-DC conversion, due to the presence of zero input current near the zero crossing of line input voltage. In this paper, a single-switch forward converter with high power factor and low storage capacitor voltage stress is proposed. By adding a stack up voltage on top of the reflected input voltage on the forward conver...

BACKGROUND Fluctuation-induced phenomena caused by both random and deterministic stimuli have been previously studied in a variety of contexts. They are based on the interplay between the spectro-temporal patterns of the signal and the kinetics of the system it is applied to. The aim of this study was to develop a method for designing fluctuating inputs into nonlinear system which would elicit ...

Nowadays, high importance is given to low energy devices (such as refrigerators, deep-freezers, washing machines, pumps, etc.) that are able to produce reactive power in power lines which can be optimized (reduced). Reactive power is the main component which overloads power lines and brings excessive thermal stress to conductors. If the reactive power is optimized, it can significantly lower th...

A mathematical optimization problem is formulated to design several components of an electrical power distribution system for next generation aircraft. A simple interconnected system consisting of an input filter and a DC-DC buck converter is used as the prototype for the optimization demonstration. The components are designed for minimum weight subject to performance, stability, and peak volta...

Abstract: This paper focuses on analysis and experimental results of 6-bit charge-redistribution DAC and 6-bit charge-redistribution DAC using split array configuration. These DAC configurations are designed and simulated using GPDK 180nm CMOS technology. DAC is an important component within the SAR ADC. The charge redistribution DAC in a Split capacitor configuration has a total capacitance wh...

Current mirror (CM) is the basic building block in analog and mixed mode circuit design. For high performance analog circuit applications, the current transfer ratio, output impedance and output swing are the most important parameters to determine the performance of the current mirror. CM’s are important for analog integrated circuits because of their wide use as constant sources or active load...

In this paper, selective harmonic elimination pulse width modulation (SHEPWM) using Real Coded Genetic Algorithm (RGA) and Particle Swarm Optimization technique (PSO) for single phase Matrix converter is developed and discussed. In these techniques, the objective function is optimized for optimum switching angles. The switching frequency is fixed and is equal to output frequency. The objective ...

A low power, adaptive bandwidth tracking Phase Locked Loop (PLL) is presented in this paper. Designed PLL operates over a wide frequency range of 250MHz to 1GHz with a fixed multiplication factor of 8. PLL is optimized for 0.2% UI of r.m.s. jitter over the whole frequency range with bandwidth tracking to keep the power consumption minimum. In addition, a multiplier block is used to increase the...