amplifier power supply

Thread Starter

rchandu

Joined Sep 28, 2010
3
what is the need to give power supply for an amplifier, does it convert into the form of ac signal, which is the input given by us.
 

R!f@@

Joined Apr 2, 2009
9,918
Without PSU, the circuit will not work, no biasing, no out put...nothing.

And yes from the power supply output is produced. Dc is converted to AC with respect to input.
 

R!f@@

Joined Apr 2, 2009
9,918
It all depends on the amplifier tht U have in mind.
Stereo or mono and Power requirements to the desired load.

All in all a stereo one will need twice the current rating that is needed for the same mono amp.
Current and voltage depends on the amp power rating.
Voltage supplied from the PSU should typically 3 to 5V higher than the output voltage swing to prevent clipping at full output.

Clipping will damage any amp plus speakers. And will also result in severe distortion.

For further info go here .

 

David Bridgen

Joined Feb 10, 2005
278
what is the need to give power supply for an amplifier
Where else would the output sound (the output power) come from?

The power input to the amplifier, from either a battery or from a mains power source, is converted by the loudspeaker/s into audio power.

The very simplified diagram aims to show that the amplifier's output stage/s and the loudspeaker are in series across the supply.

During a positive excursion of the input signal current flows from the positive supply, the upper output transistor and the 'speaker.

During a negative excurion of the input signal current flows from the negative supply, the 'speaker and the lower output transistor.


 
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