Audio amplifier circuit is for a complete optical transmitter. The circuits increase and filter the voice audio signals from an electrets microphone. These are designed for different voltage levels. audio amplifier circuit uses more than one channels that can be in parallel or series. diffident power audio amplifiers for powerful small speakers or other light loads can be created in a number of ways.

The first choice is usually an integrated circuit designed for the purpose. Discrete designs can also be built with readily available transistors and many designs are featured in manufacturers' application notes.
Stages Of Audio Amplifier Circuit

* Audio amplifier circuit are consisting of two stages of amplification.

* Operational amplifier

* General-purpose amplifier

The operational amplifier is used as a pre-amplifier whose gain is controlled by its feedback resistor. The is a general-purpose power amplifier used as the output driver for delivering power to the speaker. The volume of the speaker may be controlled via resistor or capacitor must be placed from corner to corner of the power supply to reduce the noise. The value of Resistor must be selected well to stop alternation.
Constructing Audio Amplifier Circuit

For constructing audio amplifier circuit you have to understand the following steps

* You have to understand electrical individualities of different audio speakers

* You should have the detailed characteristics of condenser microphones

* You must design a single-supply and battery-operated circuits

* It will be necessary for you to use the diode limiters for input protection

* You must know the use of de-coupling capacitors

* You should have complete knowledge for active filters for tone control

* You should know how to choose DC overcrowding capacitors

In constructing audio amplifier circuit is that you need just adding few submissive components and your amplifier will be ready. You can even amplify transonic range if you wish to neglect its usage, just to encourage you that this chip is more than enough to handle any range of audio signal. Although many manufacturer produce this different chips, in broad-spectrum, these various chips from various manufacturer normally obey with these following features

* Short circuit protection between all pins.

* High current output

* Built-in over temperature fortification.

* Low down harmonic and crossover alteration.

Different Applications Of Audio Amplifier Circuit

Audio amplifier circuit has the following applications

* AM-FM radio amplifiers

* Portable tape player amplifiers

* Intercoms

* TV sound systems

* Line drivers

* Ultrasonic drivers

* Small servo drivers

* Power converters
Audio Amplifier Circuit

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