This paper studies a particular single-stage power-factor-correction (PFC) switching regulator employing a discontinuous-conduction-mode (DCM) boost-input cell and a continuous-current-mode (CCM) forward output cell. Although this single-stage PFC regulator can provide a reasonably high power factor when its PFC stage is operating in discontinuous mode, substantial reduction in line-current har...

This paper proposes fluorescent electronic ballast with high power factor and low line input current harmonics. The system performance can be improved by a charged pump circuit. Details of design and circuit operation are described. The proposed electronic ballast is modified from single stage half bridge class D electronic ballast by adding capacitor parallel with each power switch and setting...

Optical circuits are capable of providing large bandwidth improvements relative to electrical-switched networks in high-performance computing (HPC) systems. However, due to the circuit switching nature of optical systems, setup delays may prevent HPC systems from fully utilizing the available bandwidth. This paper proposes an applicationguided circuit management technique that can achieve laten...

Resistive RAMs (ReRAMs), where the resistance is changed by voltage and current biases, have extensively been studied to develop high-speed and large-capacity nonvolatile memories as well as functional nonvolatile memories. ReRAMs are so far intended for use as alternatives to contemporary flash memories, but the applications are not limited to Boolean alternatives. Although physical mechanisms...

In this paper we illustrate a new protocol stack, namely the FCNS (Future Core Networks System), primarily designed for carrying signalling information in the UMTS core network packet switched domain that will provide interoperability with the circuit switched domain and greater flexibility, robustness and security than the proposed schemes from the telecommunications community. The paper is di...

Telephone networks can be well modeled using an exponential distribution because they show a relatively homogeneous and predictable behavior over large time scales. In contrast to these circuit-switched networks the Internet has very diierent characteristics. At rst people tried to create simulations of this global network with the same tools that were used before, but soon realized that its tr...

In this paper we consider a local area network (LAN) of dual mode service where one is a token bus and the other is a carrier sense multiple access with a collision detection (CSMA/CD) bus. The objective of the paper is to find the overall cell/packet dropping probability of a dual mode LAN for finite length queue M/G/1(m) traffic. Here, the offered traffic of the LAN is taken to be the equival...

In the previous lecture, we discussed the five-layer model of networking. In this lecture, we will discuss four topics. First, we’ll look at the original goals for the Internet when it was first designed. This is useful because it’ll help us understand why the Internet is the way it is. Second, we’ll look at two approaches to building networks: packet and circuit switching. We’ll explain why th...

Soft switching of DC-DC converter is done here. This is obtain good efficiency and to reduce the switching losses. Zero voltage switching reduces the switching losses in the circuit. This is done by using boost converter. Soft-switching characteristic of the proposed converter reduces switching loss of active power switches and raises the conversion efficiency. A voltage step-up function and a ...