Recently, the V type of constant on-time control has been widely used to improve light-load efficiency. In V implementation, the nonlinear PWM modulator is much more complicated than usual, since not only is the inductor current information fed back to the modulator, but the capacitor voltage ripple information is also fed back to the modulator. Generally speaking, there is no sub-harmonic osci...

In this paper presents a literature survey on improvement of power factor and reduction of harmonics in three phase induction motor by Pulse Width Modulation (PWM) techniques. Also presents the current status of the improvement of power factor and reduction of harmonics in three phase induction motor by PWM techniques. Authors strongly believe that this survey article will be very much useful t...

Abstract— This paper proposes a fixed-frequency pulsewidth-modulation based sliding mode current controller for boost converters. The aim of having such a nonlinear controller is to support the control applications of boost converters requiring a fast dynamical response over a wide range of operating conditions. The methods of modeling the system and translation of the sliding mode control equa...

Currently, the cellphone industry is moving towards an integrated CMOS solution for power amplifiers. Cheaper phones for consumers and better bottom lines for companies are the result of this. The goal of this thesis is to investigate the use of pulse width modulation in a high efficiency integrated CMOS power amplifier for a wireless application. Though high efficiency CMOS power amplifiers ex...

This article proposes a novel mean for tuning the natural frequency of an electromagnetic resonant shunt, using pulse-width modulation (PWM) circuit. It is used to modulate value capacitance and electrical shown be proportional command parameter PWM, duty cycle. An easy efficient strategy tune shunt in real time then proposed, thus obtaining low powered always stable vibration control device. T...

Performance of Rake reception of Ultra Wideband (UWB) signals is evaluated from energy capture perspective. In addition to ordinary all Rake (ARake) and selective Rake (SRake) receivers which are considered in conventional spread spectrum communications, we introduce optimum ARake and SRake receivers which include the estimation of delay of the combining multipaths. Impact of pulse-width is dis...

We comment on a recent Letter [Opt. Lett. 35, 4121 (2010)], in which the authors discuss an optimal pulse-width modulation (OPWM) method for sinusoidal fringe generation. We consider that the comparison of the squared binary method (SBM) and the sinusoidal pulse-width modulation (SPWM) method has considerable deficiencies.