Looking for a wiring diagram for rear bose 975 powered speakers. ....etc

[:=Read Full Message Here=:]

Common Emitter BJT Amplifier Design Current Mirror Design


Some Random Observations
Conditions for stabilized voltage source biasing
Emitter resistance, RE, is needed.
Base voltage source will have finite resistance, RB.
needs to be much larger than RB.
Small RB - relative to RS - will attenuate input signal.
Larger RE permits larger RB, but results in lower gain.
Gain = -RC/RE for RE >> re.
Split RE with bypassing increases gain.
Requires large bypass cap ....etc

[:=Read Full Message Here=:]

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

[:=Read Full Message Here=:]

Understanding Operational Amplifier Specifications



Introduction

The term operational amplifier, abbreviated op amp, was coined in
the 1940s to refer to a special kind of amplifier that, by proper
selection of external components, can be configured to perform a
variety of mathematical operations. Early op amps were made
from vacuum tubes consuming lots of space and energy. Later op
amps were made smaller by implementing them with discrete
transistors. Today, op amps are mon ....etc

[:=Read Full Message Here=:]

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

[:=Read Full Message Here=:]

I am looking for bose amplifier sigma 975 wiring diagram four wire connector ....etc

[:=Read Full Message Here=:]

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

[:=Read Full Message Here=:]

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

[:=Read Full Message Here=:]

Automatic temperature controlled fan
Here is a scheme through which the fan can be linearly thespeed controlledautomatically, dependingon the room temperature. The scheme is effective because it ishighly control thyristors forpower. Alternatively, samecircuit can be used to automatically control AC temperaturecontrolled.In this diagram, temperature NTC thermistor is sensorused, i.e. one Havinga multiplier negative temperatures. The resistance of the thermistor in Thevalue 25 with the isabout 1 kilogram-ohm.Op Amp A1 essentially works for ASI t ....etc

[:=Read Full Message Here=:]

i need the circuit diagram of rf amplifier for my mini project ....etc

[:=Read Full Message Here=:]