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- 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 inaudio amplifier Block diagram of audio amplifier Parameters for audio amplifier Applications Conclusion
- 3. INTRODUCTION • An audioamplifier 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 poweramplifier 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 AUDIOAMPLIFIER Voltage amplification stage 1 Driver stage 2 Output stage 3
- 6. BLOCK DIAGRAM OFAUDIO 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 AUDIOAMPLIFIER These are interdependent , increasing gain often leads to undesirable increases in noise and distortion.
- 9. APPLICATIONS OF AUDIOAMPLIFIER 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 workingand applications of audio amplifliers
- 11.