Audio Amplifier Circuit



In the first part of lab#1 you will construct a low-power audio amplifier/speaker driver based
on the LM386 IC from National Semiconductor. The audio amplifier will be a selfcontained, battery-operated component. In the second part of the lab you will construct a
microphone circuit using a compact electret condenser microphone cartridge. These circuit
modules are important building blocks of many audio communications systems, and will be
used in our ultrasonic transceiver system. ....etc

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power amplifier circuit diagram



Circuit Description
There are many instances where a simple and reliable power amplifier is needed - rear and centre channel speakers for surround-sound, beefing up the PC speakers, low powered tweeter amplifier, etc. For those who want to build their own 'Gainclone' amplifier, this will certainly do the job :-)
This project (unlike most of the others, but in a similar vein to Project 19) is based almost directly on the typical application ci ....etc

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EQUIVALENT CIURCUIT AND PRE-DETERMINATION OF PERFORMANCE CHARACTERISTICS OF 1 INDUCTION MOTOR
AIM:
To draw the performance characteristics of a single phase induction motor by conducting the no-load and blocked rotor test.
FUSE RATING:
125% of 7.6A=10A
THEORY:
A 1- induction motor consists of stator,rotor and other associated parts.In the rotor of a single phase winding is provided.The windings of a 1- winding(provided) are displaced in space by 120 .A single phase current is fed to th ....etc

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send me all the latest informations about Data Pre Processing .
plus send me the latest abstract. ....etc

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Pre-Term Birth Prediction using Neural Network

This project has three contributions: 1) to evaluate how changing the a priori distribution of the training set affects the performance of a back-propagation feed-forward Artificial Neural Network (ANN) in predicting PreTerm Birth (PTB) for obstetrical patients, 2) to assess the effectiveness of the weight elimination cost function in improving the ANN's classification of PTB and in identifying a new minimal dataset, and (3) to determine if PTB can be predicted outside of clinical trial s ....etc

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Amplifier circuit


As we have developed di erent models for DC signals (simple large-signal model) and AC
signals (small-signal model), analysis of BJT circuits follows these steps:
DC biasing analysis: Assume all capacitors are open circuit. Analyze the transistor circuit

using the simple large signal mode as described in pages 77-78.
AC analysis:

1) Kill all DC sources
2) Assume coupling capacitors are short circuit. The e ect of these capacitors is to set a
lower cut- ....etc

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Mini Mic Pre-Amplifier Circuit based IC LM358



Simple Audio Pre-Amp circuit
Designed based on single Transistor 2N3904, this circuit will provide good gain for weak audio signals such as electret microphone. Easy to build and really simple for pre-amp circuit

Condenser Mic preamplifier
This is a very simple preamplifier circuit for condenser microphone. This mic preamplifier also can be used for dynamic microphone.

You can replace the BC549 with BC109C. For bette ....etc

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Prepared by:
Burkhard Stiller
George Fankhauser
Bernhard Plattner
Nathalie Weiler


Executive Summary

Electronic Commerce platforms offer an opportunity for businesses and challenges for research. As closed markets
do require generic transport services only, open Electronic Commerce marketplaces need to deal with the
delivery of advanced electronic services due to intense trends to value added information services. After having
deployed proprietary platforms, solutions with global access networks commenced ....etc

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LABORATORY INVESTIGATION OF LOW SWIRL INJECTOR FOR LEAN PRE-MIXED GAS TURBINES

SEMINAR REPORT Submitted by
KIRAN .G.
S7M2
ROLL NO-30
Department Of Mechanical Engineering
College of Engineering, Thiruvananthapuram 16
OCTOBER 2010




ABSTRACT

Laboratory experiments have been conducted to investigate the fuel effects on the

turbulent premixed flames produced by a gas turbine low-swirl injector (LSI). The

lean-blow off limits and flame emis ....etc

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rc coupled amplifier circuit using transistor using bc548

Amplifier is a circuit that is used for amplifying a signal. The input signal to an amplifier will be a current or voltage and the output will be an amplified version of the input signal. An amplifier circuit which is purely based on a transistor or transistors is called a transistor amplifier. Transistors amplifiers are commonly used in applications like RF (radio frequency), audio, OFC (optic fibre communication) etc. Anyway the most common application we see in our day to day life is ....etc

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