Circuit of an automatic switch for audio power amplifier stage is presented here. The circuit uses stereo
preamplifier output to detect the presence of audio to switch the audio power amplifier on only when
audio is present. The circuit thus helps curtail power wastage. IC1 is used as an inverting adder. The
input signals from left and right channels are combined to form a common signal for IC2, which is used
as an open loop comparator. IC3 (NE556) is a dual timer. Its second section, i.e., IC3(b), is configured
as mono ....etc

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CAPACITIVELY COUPLED BIOSIGNAL INSTRUMENTATION SYSTEM FOR POWER AND SIGNAL ISOLATION
SEMINAR REPORT
Submitted by
Archana Nair . I
Seventh Semester B.Tech
Applied Electronics and Instrumentation
DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING
COLLEGE OF ENGINEERING
TRIVANDRUM
2010

ABSTRACT

Requirements for patient safety and a high interference rejection ratio in medical equipment create a demand for effective isolation devices. A system scale approach that uses cap ....etc

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mode of operation of a telephone amplifier.it uses an LM386 which amplifies the signal coming into the telephone inorder to increase the volume
....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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Microelectronics is a subfield of electronics. As the name suggests, microelectronics relates to the study and manufacture (or microfabrication) of very small electronic designs and components. Usually, but not always, this means micrometre-scale or smaller. These devices are typically made from semiconductor materials. Many components of normal electronic design are available in a microelectronic equivalent. These include transistors, capacitors, inductors, resistors, diodes and (naturally) insulators and conductors can all be found in microel ....etc

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Abstract

A human's ability to perform physical tasks is limited by physical strength, not by intelligence. We define extenders as a class of robot manipulators worn by humans to augment human mechanical strength, while the wearer's intellect remains the central control system for manipulating the extender. Our research objective is to determine the ground rules for the design and control of robotic systems worn by humans through the design, construction, and control of several prototype experimental direct-drive/non-direct-drive multi-deg ....etc

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Sub Code : 10ES32 IA Marks : 25
Hrs/ Week : 04 Exam Hours : 03
Total Hrs. : 52 Exam Marks : 100
UNIT 1:
Diode Circuits: Diode Resistance, Diode equivalent circuits, Transition and
diffusion capacitance, Reverse recovery time, Load line analysis, Rectifiers,
Clippers and clampers. 6 Hrs
UNIT 2:
Transistor Biasing: Operating point, Fixed bias circuits, Emitter stabilized
biased circuits, Voltage divider biased, DC bias with voltage feedback,
Miscellaneous bias configurations, Design operations, Transistor switching
networks, PNP transi ....etc

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dear sir
sub:i request to download your ofc notes
i am kavyashree h .c .i study 7th sem ece. i request to download the 7th sem ofc notes.
thanks you sir




rtyurtyur
dear sir
sub:i request to download your ofc notes
i am kavyashree h .c .i study 7th sem ece. i request to download the 7th sem ofc notes.
thanks you sir




rtyurtyur
dear sir
sub ....etc

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Antennas/radar/SONAR/microwave/based on fiber-optical communication large projects
1. mobile phone signal Jammer for GSM, CDMA and 3 g networks with early
2. implementation of high sensitive indication of the GSM signal detector with audio and Visual alert
3. realization of the model of target Radar direction with the system ID of the remote station alert
4. study of the parabolic antenna for direct to home communication
5. using the microcontroller of the protected data, using fiber-optic lines
6. the target range Score Using ultrasonic sonar ....etc

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A Multi-cell Linear Power Amplifier for Driving Piezoelectric Loads
RAKESH K P
S-7 AEI
Roll No: 48
College Of Engineering , Trivandrum
2007-11 batch


Introduction
Describes about multicell amplifier , developed by connecting floating signal modules in series to drive piezoelectric devices.

PIEZOELECTRIC devices or actuators have been used as positioners or driving motors in many fields such as optics, precision machining, and fluid control, as well as in optical disk drives ....etc

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