Class D audio amplifiers have gained significant influence in sound reproduction due to their high efficiency. One of the most commonly used control methods in class D amplifiers is known as self-oscillation. An parameter of key interest in self-oscillating class D amplifiers is the switching frequency, which can be directly related to the performance of the amplifier. This paper will clearify ...

The effort to obtain ever-increasing power density of switched-mode power supply has been limited by the size of passive components. Operation at higher frequencies considerably reduces the size of passive components, such as transformers and filters; however, switching losses have been an obstacle to high-frequency operation. To reduce switching losses and allow high-frequency operation, reson...

Multilevel inverter has so many advantages than conventional two level inverter. As the number of level increases the output approaches to a pure sinusoidal wave.Multilevel inverter using both fundamental frequency switching and higher frequency switching. In this paper discuss only about higher frequency switching.In higher frequency switching we are using two signals, one is reference signal ...

We recently proposed a dynamic copy-choice model for retroviral recombination in which a steady state between the rates of polymerization and RNA degradation determines the frequency of reverse transcriptase (RT) template switching. The relative contributions of polymerase-dependent and polymerase-independent RNase H activities during reverse transcription and template switching in vivo have no...

An explicit solution of the equation for the classical harmonic oscillator with smooth switching of the frequency has been found . A detailed analysis of a quantum harmonic oscillator with such frequency has been done on the base of the method of linear invariants. It has been shown that such oscillator possesses cofluctuant states, different from widely studied Glauber’s coherent and ”ideal” s...

If an oscillator is driven by a force that switches between two frequencies, the dynamics it exhibits depends on precise manner of switching. Here we take one-dimensional and consider scenarios in which switching occurs: (i) driving forces have different or (ii) as single forcing whose frequency values. The difference subtle, but entirely changes long term behaviour, concerns whether switch can...

Noise is essential for the existence of a liquid market, and if noise traders are not present in the market, the trade volume will drop severely and an important aspect of the market philosophy will be lost. However, these noise traders bring noise to the market, and the existence of noise in prices indicates a temporary deviation in prices from their fundamental values. In particular, high-fre...