CLASS-D AMPLIFIERS
Abstract
Class D amplifiers present us with a revolutionary solution, which would help us eliminate loss and distortions caused due to conversion of digital signals to analog while amplifying signals before transmitting it to speakers. This inchoate piece of knowledge could prove to detrimental in improving and redefining essence of sound and take it to a different realm.

This type of amplifiers do not require the use of D-A conversion and hence reduce the costs incurred for dev ....etc

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Abstract
This paper proposes a feed-forward control in a halfbridgeresonant dc page link inverter. The configuration of feed-forwardcontrol is based on synchronous sigma-delta modulation and the halfbridgeresonant dc page link inverter consists of two inductors, onecapacitor and two power switches. The simulation results show theproposed technique can reject non-ideal dc bus improving the totalharmonic distortion.
Keywords—Feed-forward control, Resonant dc page link inverter,Synchronous sigma-delta modulation.
I. INTRODUCTION[/b ....etc

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This article is presented by:
SUDEESH S
COMPUTER SCIENCE AND ENGINEERING
SCHOOL OF ENGINEERING
COCHIN UNIVERSITY OF SCIENCE &TECHNOLOGY,
KOCHI-682022
OPTICAL CAMOUFLAGE
ABSTRACT

While new high-performance, light-transmitting materials such as aerogel and light-transmitting concrete compel us to question the nature of solidity, a new technology developed by ....etc

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Wireless Charging
Submitted By
Mr.Deshmukh Sachin Bharat
Er. Rathi P.K. Er. Borkar B.S.
Seminar Guide Seminar Co-Ordinator
Department of Information Technology,
Amrutvahini College of Engineering,
Sangamner “ 422608
ABSTRACT
It seems these days that everyone has a cellular phone. Whether yours is for business purposes or personal use, you need an efficient way of charging the battery in the phone. But, like most people, you probably donâ„ ....etc

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Presented By
Haseena Hassan


The Half Adder & Full Adder
The Half Adder
Adds two binary digits
Produces a sum bit(S) and a carry bit(C)
Carry C is the AND of A and B
ie,C=AB
Sum is the X-OR of A and B
ie,S=AB+AB
The Full Adder
Adds two bits and a carry input
Outputs a sum bit and a carry
Adds the bit A&B and carry frm previous column(carry in)
Logic Diagram of full adder
....etc

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INTRODUCTION:
Battery is a device that stores energy and makes in it an electrical form. An electrical battery is a device for creating or storing electrical energy composed of several similar cells that are connected together. An electrical cell is a single unit, possibly one cell in a battery of multiple cells.
In 1748, Benjamin Franklin coined the term battery to describe an array of charged glass plates. The voltaic pile was a chemical battery developed by Alessandro Volta in 1800. In 1800, William Nicholson and ....etc

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SEMINAR REPORT ON SMPS
Presented BY
PRIYANKA N.
VIDYA VIKAS INSTITUTE OF ENGINEERING AND TECHNOLOGY

INTRODUCTION:
SMPS i.e. Switch Mode Power Supply, before starting to introduce this topic we first have to
know what power supplies are
Power Supply: A device for the conversion of available power of one set of characteristics to
another set of characteristics to meet specified requirements.
Conventional series regulated linear supplies maintain a constant voltage by dissipating excess
power in ohmic ....etc

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Phase Angle Control in Triac-based Single-phase AC Regulators


Instructional Objectives
Study of the following:
¢ The circuit used for the phase angle control in triac-based single-

phase ac regulators (ac to ac voltage converters)
¢ The operation of the various blocks used in the circuit, along with

the waveforms
¢ The harmonic analysis of the output voltage of a single-phase ac

regulator with resistive load
Introduction
In the last lesson - second one in the first half of this ....etc

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Single-phase half-bridge inverter


Operational Details

Consists of 2 choppers, 3-wire DC source
Transistors switched on and off alternately
Need to isolate the gate signal for Q1 (upper device)
Each provides opposite polarity of Vs/2 across the load

DC Supply Current
If the inverter is lossless, average power absorbed by the load equals the average power supplied by the dc source.
For an inductive load, the current is approximately sinusoidal and the fundamental component of the o ....etc

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CHAPTER 1
INTRODUCTION
1.1 MOTIVATION
Electronic mail”often abbreviated as e-mail or email”is a digital communication mechanism, designed primarily for human use, which consists of message content, an author and one or more recipients. It is a facility typically added quickly to any online communication service, whether a single machine or a network. In some other words Email is simply the shortened form of electronic mail, a protocol for receiving, sending and storing electronic messages. Email has gained ....etc

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Name– study of half adder logic circuit.
Aim – to study the working of half adder for two binary digits addition.
Apparatus – IC 7408, IC 7486, circuit board, LEDs, power supply +5V DC, connecting wires, soldering iron, cutter etc.
Circuit diagram


Procedure –
1) Solder the circuit on the given board.
2) Connect respective pins of each gate to the corresponding pins of other gate.
3) Connect the outputs ‘sum’ and ‘carry’ to two LEDs.
4) Apply diff ....etc

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