An Integrated Silicon Carbide (SiC) Based Single Phase Rectifier with Power Factor Correction



I. INTRODUCTION
Power supplies are one of the most crucial building
blocks of a modern society, converting high-voltage AC
into low-voltage DC for use in electronic circuitry in office
equipment, telecommunication, and consumer electronics.
Over 2.5 billion AC/DC power supplies are currently in use
in the United States alone, about 6 to 10 billion are in use
worldwide, thus improv ....etc

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A SONOS memory cell is formed from a standard polysilicon NMOS transistor with the addition of a small sliver of silicon nitride inserted inside the transistor's gate oxide. The sliver of nitride is non-conductive but contains a large number of charge trapping sites able to hold an electrostatic charge. The nitride layer is electrically isolated from the surrounding transistor, although charges stored on the nitride directly affect the conductivity of the underlying transistor channel. The oxide/nitride sandwich typically consists of a 2 nm thi ....etc

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Presented by
Sudheesh K N


Micromachining
Implies parts are made to the size of 1 to 999 m
By the definition micro engg: as the field where component sizes are a few millimeters
Important aspects
Unit removal
Equipment precision
Classification According to Machining phenomena
Removal by mechanical force
Removal by ablation
Removal by dissolution
Plastic deformation
Laser micro machining
Uses a power source (FS laser, Excimer laser) that emits a beam with very high quantum energy.
Laser M ....etc

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Abstract
This presentation describes a new valveless micropump for bidirectional use. The micropump was fabricated by bonding a fluidic channel and a membrane actuator. The fluidic channel was etched on a glass substrate and the membrane actuator was made on a silicon wafer. The membrane is actuated by a piezoelectric ceramic (PZT) plate so that the membrane generates blowing and suction flows successively along an oblique channel which is connected to the main channel. A blowing flow from an oblique channel into the main channel generates ....etc

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Introduction
A number of different micropumps have been developed over the last decades. Among the various kinds of working principles, the micropump using membrane actuation is known as a promising approach. Therefore, a lot of membrane micropumps have been studied with various actuators. The valve is another issue for the development of micropumps. Since a piezoelectric micropump with check valves was first presented by Van Lintel et al. , passive or active check valves have been widely used for micropumps. The micropump with check valves ....etc

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