About audio amplifier

1. AUDIO AMPLIFIER
Presented by,
S.B.Reshma ,
ECE-2 year,
115011013903.
All Rights reserved. Not for distribution. Single user license

2. SYNOPSIS
Introduction
Working principle
Stages in audio amplifier
Block diagram of audio amplifier
Parameters for audio amplifier
Applications
Conclusion

3. INTRODUCTION
• An audio amplifier is an electronic amplifier that strengthens
low-power , inaudible electronic audio signals which is strong
enough for driving loudspeakers or headphones
• This includes both amplifiers used in home audio systems
and instrument amplifiers like guitar instruments

4. WORKING PRINCIPLE
The power amplifier works on the basic
principle of converting the DC power
drawn from the power supply into an AC
voltage signal delivered to the load

5. STAGES IN AUDIO AMPLIFIER
Voltage
amplification
stage
1
Driver stage
2
Output stage
3

6. BLOCK DIAGRAM OF AUDIO AMPLIFIER
Voltage amplification stage1
Driver stage2
Output stage3

7. DIFFERENT STAGES
Voltage amplification
stage
• It consists of 2
or more RC
coupled class A
amplifiers which
gives necessary
voltage gain
Driver stage
• It provides
enough current
gain in order to
drive the output
stage
Output stage
• It is connected
to the
loudspeaker
• It gives
improvement to
the power gain
and transfers
power to the
loudspeaker
with minimum
loss

8. PARAMETERS FOR AUDIO AMPLIFIER
 These are
interdependent ,
increasing gain often
leads to undesirable
increases in noise and
distortion.

9. APPLICATIONS OF AUDIO AMPLIFIER
Important
applications
• Public address
system
• Theatrical and
concert sound
reinforcement
systems
Domestic
applications
• stereo
• home-theatre
system
Instrument
applications
• Guitar amplifiers
• Electric keyboard
amplifiers

10. CONCLUSION
These are working and applications of audio
amplifliers

11. THANK YOU